 | | | | | |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists will
hopefully forgive me for my previous indiscretions since this model is 100%
Lego!
Jennifer
| | | | | | | | | | | | | | | |
In lugnet.announce.moc, Jennifer Clark wrote:
| |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists
will hopefully forgive me for my previous indiscretions since this model is
100% Lego!
|
Thanks for another great write-up Jen - and another great model! Been looking
forward to the details :)
One question I have though - did you investigate using an adder-subtracter in
the base? using the centre axle for drive and the clutch gears for turning might
make driving easier, eliminating the lag problem with the clutch gears, which
would only affect turning. Not sure what effect it would have on the slewing
problem though....
ROSCO
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In lugnet.technic, Ross Crawford wrote:
| |
One question I have though - did you investigate using an adder-subtracter in
the base? using the centre axle for drive and the clutch gears for turning
might make driving easier, eliminating the lag problem with the clutch gears,
which would only affect turning. Not sure what effect it would have on the
slewing problem though....
|
I have done some tests in the past with adder-subtracter based tracked vehicles
and have two major problems with them. The first is that in straight line travel
you are only getting the benefit of one motor driving the tracks, whereas with
the normal method of one motor per track you get two motors doing this. The
other is that I found control of the vehicle less intuitive with the
adder/subtractor.
In any case, with the large gear reduction after the clutch gears, the lag is
really insignificant. You have to really look for it to notice, and if you
didn’t know about it I don’t think you would know it was there.
I think if one was to slew with an adder/subtracter it would drive the vehicle
and turn it simultaneously, probably a worse outcome than the current situation
which only drives the vehicle in a straight line.
My suspicion is that adder/subtracter diff arrangements are more appropriate for
robotic than human control.
Jennifer
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In lugnet.technic, Jennifer Clark wrote:
| |
In lugnet.technic, Ross Crawford wrote:
| |
One question I have though - did you investigate using an adder-subtracter
in the base? using the centre axle for drive and the clutch gears for
turning might make driving easier, eliminating the lag problem with the
clutch gears, which would only affect turning. Not sure what effect it would
have on the slewing problem though....
|
I have done some tests in the past with adder-subtracter based tracked
vehicles and have two major problems with them. The first is that in straight
line travel you are only getting the benefit of one motor driving the tracks,
whereas with the normal method of one motor per track you get two motors
doing this. The other is that I found control of the vehicle less intuitive
with the adder/subtractor.
In any case, with the large gear reduction after the clutch gears, the lag is
really insignificant. You have to really look for it to notice, and if you
didn’t know about it I don’t think you would know it was there.
I think if one was to slew with an adder/subtracter it would drive the
vehicle and turn it simultaneously, probably a worse outcome than the current
situation which only drives the vehicle in a straight line.
My suspicion is that adder/subtracter diff arrangements are more appropriate
for robotic than human control.
|
Hmmmm you may be right - I’m still disappointed you didn’t implement automatic
bucket release though ;)
And have you seen those new mini excavators that have the ability to move the
dipper assembly sideways? they have a sort of parallelogram linkage and another
hydraulic cylinder. I should try yo get a pic of one.
Also I saw the other day a JCB backhoe with an extendable dipper - it was
telescopic, with the hose for the bucket & bucket release doubled back inside
it. I’m not sure what it is intended for, but this guy was just using it when he
needed to change the backet, so he didnt have to have the alternate buckets so
close i guess. Anyway, there’s another couple of challenges for you ;)
ROSCO
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In lugnet.technic, Ross Crawford wrote:
| |
Hmmmm you may be right - I’m still disappointed you didn’t implement
automatic bucket release though ;)
|
One of these days :-) It is probably doable with the small pneumatic cylinder.
| |
And have you seen those new mini excavators that have the ability to move the
dipper assembly sideways? they have a sort of parallelogram linkage and
another hydraulic cylinder. I should try yo get a pic of one.
|
I came across this when building the JS70 model on my website, the datasheet
mentioned a “parallel offset boom” and I had no idea what it was until I asked
someone. It is indeed as you describe, and apparently avoids the need to
constantly reposition the excavator when digging trenches etc. Also good for
digging up agaist walls and so on.
| |
Also I saw the other day a JCB backhoe with an extendable dipper - it was
telescopic, with the hose for the bucket & bucket release doubled back inside
it. I’m not sure what it is intended for, but this guy was just using it when
he needed to change the backet, so he didnt have to have the alternate
buckets so close i guess.
|
Interesting, I saw exactly one of those a few weeks ago too, prior to this I had
never seen one, perhaps it is a new thing for this type of machine? I didn’t see
the operator do anything fancy with it either.
Jennifer
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In lugnet.announce.moc, Jennifer Clark wrote:
Stunning! Beautiful work, as usual. Excavators are fascinating and you have done
a great job at modeling both the functionality and appearance of the real thing.
I have been really impressed with the design and content of your website, and
this page is no exception. I especially like the renderings as they show the
inner workings really well. Can’t imagine how much work must have gone into
those.
Now, some particular questions:
-concerning the concentric drive through the turntable, would it be possible to
put the clutch gears back to back so the teeth mesh, or would this
be too short for the turntable? I think it would be great for Lego
to release more parts to allow concentric drive shafts. It would be
great for planetary gearing and other stuff.
-I’m curious why you didn’t use the switch on the 9v battery box for your
pressure regulator as in your previous controller. I used this design in my
last robot and found it worked much better than the polarity switch. The
‘dead band’ seems to be much smaller. Great job on the controller, by the
way. I like how you combined functions with the joysticks. I saw a similar
design done by Fabio Sali.
-how close is the geometry you used for mounting the cylinders back to back? It
seems like there are a lot of different methods out there on how to do
this, some better than others. From what I can tell, you have a brick and a
plate between the cylinders. Are they connected by anything else other than
the two liftarms at the sides? Wouldn’t the cylinder with its bottom
against the plate slide out?
Once again, great work, and thanks for sharing!
Rob
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In lugnet.technic, Rob Stehlik wrote:
| |
-concerning the concentric drive through the turntable, would it be possible
to put the clutch gears back to back so the teeth mesh, or would
this be too short for the turntable?
|
It would indeed be too short for the turntable. However, if Lego come out with a
spacer part, perhaps one or two studs long, that meshed with the teeth on the
clutch gears it would be possible to make concentric shafts of arbitrary length
and little backlash. The main problem then would be ensuring that there was
enough bracing to keep all the teeth on the spacers and clutch gears meshed.
| |
-I’m curious why you didn’t use the switch on the 9v battery box for your
pressure regulator as in your previous controller.
|
The small 9V battery in this box doesn’t provide as much current as having 6 AAs
in the larger battery box, and I needed a lot of current for all the motors. In
reality the small 9V battery box can’t power more than one motor effectively.
I’d be interested to see if it can even power one motor as well under load as
the large 9V box.
| |
-how close is the geometry you used for mounting the cylinders back to back?
It seems like there are a lot of different methods out there on how to
do this, some better than others. From what I can tell, you have a brick
and a plate between the cylinders. Are they connected by anything else
other than the two liftarms at the sides? Wouldn’t the cylinder with its
bottom against the plate slide out?
|
It is as you see it, and there are no problems with cylinders coming apart. It
is very robust, the parts fit very tightly together, in fact I think it is
really on the threshold of what is reasonable in terms of lego tolerances.
Jennifer
| | | | | | | | | | | | | | | | | | |
In lugnet.announce.moc, Jennifer Clark wrote:
| |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists
will hopefully forgive me for my previous indiscretions since this model is
100% Lego!
|
Except for the stickers! :-) (1)
Wow, what an awesome model. How are you going to top yourself next? Spotlighted.
++Lar
1 - I’m not purist enough to eschew custom stickers, mind you, but I couldn’t
let your claim slide... :-)
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In lugnet.technic, Larry Pieniazek wrote:
| |
Except for the stickers! :-) (1)
|
I knew someone would say that! It had to be you Larry :-)
Jennifer
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Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> <http://www.genuinemodels.com/>
Amazing! A wonderful model, Jennifer. Thank you very much for sharing your
ideas and for putting so much time into showing us the details. I will spend
the
rest of the day watching this page. :o]
Hey LEGO/TLC! This is a very good model for you to follow up Daniel Siskinds
MOC Blacksmith Shop. Please, can we have this as a Model Team/Technic? ;o)
I wouldn't mind paying a lot to have one of those at home.
(That is, if both Jen and TLC approves of course.)
// Anton
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"Jennifer Clark" <jen@vulture.dmem.strath.ac.uk> wrote in message news:HovtHu.nFK@lugnet.com...
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> <http://www.genuinemodels.com/>
>
> The model is pneumatic/electric and is operated by a separate hand controller
> which also contains the pneumatic pump and pressure cutoff switch. Purists will
> hopefully forgive me for my previous indiscretions since this model is 100%
> Lego!
this is nothing special :)
it means jen made awsome model as usually
it's marvelous
many bows to you jen
pixel
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Hej!
Först:
Har ni inte sett Jennifer Clarks senaste mästerverk ska ni genast dit!
Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model
> and placed it online here :-
>
> <http://www.genuinemodels.com/>
Sedan har jag en fråga:
Hur översätter man "turntable" till svenska? Ordet "skivspelare" funkar inte
riktigt bra för mig.
Blir det "vridskiva", "snurrplatta" eller "rotationsnav"? Har vi någon
fordonstekniker ibland oss?
Peeron listar en bunt olika turntables:
http://www.peeron.com/cgi-bin/invcgis/psearch?query=turntable&limit=parts&anyword=0
// Anton
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| |
|
In lugnet.loc.se, Eric Hampusgård wrote:
>
> Har ni inte sett Jennifer Clarks senaste mästerverk ska ni genast dit!
> >
> > <http://www.genuinemodels.com/>
Inte tittat än...
> Sedan har jag en fråga:
> Hur översätter man "turntable" till svenska? Ordet "skivspelare" funkar inte
> riktigt bra för mig.
> Blir det "vridskiva", "snurrplatta" eller "rotationsnav"? Har vi någon
> fordonstekniker ibland oss?
Inte fordonstekniker, men fuskar med allt :-)
"Vridskiva" är förmodligen tekniskt korrekt. Jfr. tyska "Drehscheibe", som vi
för övrigt har lånat rakt in till vårt svenska "drejskiva".
I mättekniska sammanhang förekommer "rundbord", "indexeringsbord", men de har ju
den extra funktionen att man skall lägga saker på dom. "Indexering" brukar
dessutom innebära att man bara har vissa, fasta, lägen.
"Karusellmagasin" används ofta som namn på en roterande anordning med verktyg
för CNC-maskiner.
Sen har vi ju "vändskiva" som är namnet i tågsammanhang, ett ord som mera bygger
på syftet (att vända lok) än funktionen (snurra).
"Karusell-skiva" kanske är en bra variant?
AndersI
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In lugnet.loc.se, Eric Hampusgård wrote:
> Hej!
>
> Först:
> Har ni inte sett Jennifer Clarks senaste mästerverk ska ni genast dit!
>
> Jennifer Clark wrote:
> > I have finished the webpage for my JCB JS220 Excavator model
> > and placed it online here :-
> >
> > <http://www.genuinemodels.com/>
>
>
> Sedan har jag en fråga:
> Hur översätter man "turntable" till svenska? Ordet "skivspelare" funkar inte
> riktigt bra för mig.
> Blir det "vridskiva", "snurrplatta" eller "rotationsnav"? Har vi någon
> fordonstekniker ibland oss?
>
> Peeron listar en bunt olika turntables:
> http://www.peeron.com/cgi-bin/invcgis/psearch?query=turntable&limit=parts&anyword=0
>
> // Anton
Den där Jennifer kan verkligen bygga... Helt otroligt, både snygt som attan och
dessutom fulproppat med funktionalitet.
När jag som liten, och lyckligt ovetande om engelska termer, lekte med LEGO
kallade jag alla "turntables" för just snurplattor. Då var det förstås mest 2x2
plates och några 4x4x1 med snurr jag hadde, något Technik turntabel hadde jag
inte på den tiden.
/Henrik
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klippetiklipp.
> Sedan har jag en fråga:
> Hur översätter man "turntable" till svenska? Ordet "skivspelare" funkar • inte
> riktigt bra för mig.
> Blir det "vridskiva", "snurrplatta" eller "rotationsnav"? Har vi någon
> fordonstekniker ibland oss?
Det finns en mängd olika ord för funktionen som sådan.. men de är alla lite
olika beroende på i vilket sammanhang de används. Finns det egentligen en
"pryl" som motsvarar Legos "turntable" i verkligheten? (Som kan stå för alla
funktioner som finns =)
/J
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In lugnet.loc.se, Eric Hampusgård wrote:
> Sedan har jag en fråga:
> Hur översätter man "turntable" till svenska? Ordet "skivspelare" funkar inte
> riktigt bra för mig.
> Blir det "vridskiva", "snurrplatta" eller "rotationsnav"? Har vi någon
> fordonstekniker ibland oss?
Haha, Jag har ett starkt minne av att vi bröder kallade dem "snurrplattor" som
barn! Fast det är nog knappast en särskilt adekvat benämning.
Möjligen blev det "karusellbit" eller bara "karusell" senare...
:)
/Tore
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Woof! That looks great! Wow! You really know how to make 'em!
e
| | | | | | | | | | | | | | | | | |
In lugnet.announce.moc, Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> <http://www.genuinemodels.com/>
>
> The model is pneumatic/electric and is operated by a separate hand controller
> which also contains the pneumatic pump and pressure cutoff switch. Purists
> will hopefully forgive me for my previous indiscretions since this model is
> 100% Lego!
>
> <<http://www.genuinemodels.com/images/js220/figure_2_1_CRW_1567_thmb.jpg>>
>
> <<http://www.genuinemodels.com/images/js220/figure_2_13_CRW_1548_thmb.jpg>>
>
>
> Jennifer
Once again you've shown us your first class engineering and art using LEGO.
Oh, and I second Anton's post- "Hey LEGO! We want to see Jennifer's work made
into a retail set!"
Adr.
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| |
|
In lugnet.announce.moc, Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> http://www.genuinemodels.com/
Congratulations on your new child (or is it more like a pet?)!
Despite the fact that you have amazed me to a great extent at no less then five
different occations - I'm stunned!
This exceeds anything I've ever seen done in the field of Technic/Modelteam
previously - really! It pushes the envelope of LEGO construction to it's limits.
It's so obvious from reading your description, looking at the photos and
watching the movies that this MOC is fully developed. There is not much that can
be done to improve on it! The flaws of the model is mostly in the limits of the
brick, such as the somewhat digital behaviour of the pneumatic system. Still,
the model is so well tuned with speed vs. performance that it can be driven
smoothly - even under load!
Watching the "dig a hole"-movie is an eye-opener. Can a MOC out of LEGO really
be *that* realistic!? Sure, the person that drives it in the movie hits the
sticks in the wrong way a few times - still it proves that it can almost be
driven as smooth as hydraulics. Some achievment!
What's most amazing is not the amount of detail or the smooth functions but the
amount of work and persistance that obviously has gone into construction it. And
the well written details, the CAD-renders and the scenery the MOC is presented
in.
Queen of LEGO-gear; I bow humbly before the!
And how hard it might seem now, I'm sure you will continue to improve your own
techniques and make constructions in the future that will surpass this in every
way. But this, this is a milestone!
--
Best regards,
/Tobbe
<http://www.lotek.nu>
(remove SPAM when e-mailing)
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| |
|
In lugnet.technic, Tobbe Arnesson wrote:
>
> It's so obvious from reading your description, looking at the photos and
> watching the movies that this MOC is fully developed. There is not much that can
> be done to improve on it! The flaws of the model is mostly in the limits of the
> brick, such as the somewhat digital behaviour of the pneumatic system. Still,
> the model is so well tuned with speed vs. performance that it can be driven
> smoothly - even under load!
Thanks for those comments Tobbe, they are well received since this balance and
tuning of which you speak was the main thing I was aiming for with this model. I
wanted it to be robust as well, and indeed even after I thought I had completed
it back in April, when I exhibited it at the Modelshow Europe in Geldermalsen
flaws were still being exposed, in that case the slewing mechanism became less
efficient after a day being operated by the visitors. The improvements I made
after this made the slewing more efficient as well as more robust, and
incremental improvements have been made in a Darwinian fashion like this ever
since.
> Watching the "dig a hole"-movie is an eye-opener. Can a MOC out of LEGO really
> be *that* realistic!? Sure, the person that drives it in the movie hits the
> sticks in the wrong way a few times
That'll be me. It's not so easy when the camera is rolling :-)
Jennifer
| | | | | | | | | | | | | | | | | | | | | | | |
| |
|
In lugnet.technic, Tobbe Arnesson wrote:
> The flaws of the model is mostly in the limits of the
> brick, such as the somewhat digital behaviour of the pneumatic system. Still,
> the model is so well tuned with speed vs. performance that it can be driven
> smoothly - even under load!
>
> Watching the "dig a hole"-movie is an eye-opener. Can a MOC out of LEGO >really
> be *that* realistic!? Sure, the person that drives it in the movie hits the
> sticks in the wrong way a few times - still it proves that it can almost be
> driven as smooth as hydraulics. Some achievment!
Hi Tobbe
The functions aren't 'digital like", I know because I too have a digger just
like Jennifer's. You can move the sticks slightly and get a proportional output.
I built my model to test the dual axis control mechanism I came up with that Jen
name-checks on her site (thanks Jen).
Even when operating the arm in the down direction you can still regulate it's
speed if you have a deft touch on the sticks.
I watched Jen's digging vid and I think all she needs is a bit more practice. It
can be tricky as I know when I tried demonstrating the device at a Legofest.
And I don't suppose she has too many opportunities to take the model to the
beach.
I think when digging you should dig with the elbow and use the bucket's crowd
feature last.
My prediction for the future is maybe using different source's of air for
different functions. Jen's bucket crowds very quickly because it's powered at
the same pressure as that used to raise the 4 rams of the arm. If you had a
second supply at quarter pressure the two functions would be more proportional
to each other.
Steve
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| |
|
In lugnet.technic, Steven Lane wrote:
>
> The functions aren't 'digital like", I know because I too have a digger just
> like Jennifer's. You can move the sticks slightly and get a proportional
> output.
I'd agree with this, it is possible to control the pneumatic valves so that more
or less air gets through them. Rather than the problem with pneumatics being of
digital in nature, to my mind the biggest problem is their elastic or springy
nature.
> I watched Jen's digging vid and I think all she needs is a bit more
> practice.
You want to watch that mouth of yours pal :-) Seriously though, it was indeed
not my best digger performance. Conditions were not ideal on the beach and I was
trying to stay out of camera shot and keep the filming concise etc. In addition
to this....
> I think when digging you should dig with the elbow and use the bucket's crowd
> feature last.
Indeed so, scraping the dirt along with the dipper is the right thing to do,
then curling the bucket to scoop before lifting it out with the boom. The
trouble was that the dipper on the model did not have enough breakout force to
initially shift the sand, but the bucket did, so I had to jiggle the bucket
about a bit to either loosen up the sand and/or get the ideal leverage point for
the dipper, and then the dipper could be moved.
The fact that it dug damp sand at all was enough for me; I had half expected
that it would not be able to.
> My prediction for the future is maybe using different source's of air for
> different functions. Jen's bucket crowds very quickly because it's powered at
> the same pressure as that used to raise the 4 rams of the arm. If you had a
> second supply at quarter pressure the two functions would be more proportional
> to each other.
Yes, I had thought about doing something similar for this model but for a
different reason. With independent pumps for each function then all functions
could be performed simultaneously rather than the air flowing down the easiest
route. I based this on the real JS220 which has 2 hydraulic circuits for the
boom functions. These can be combined into one for extra force, this could be
quite a smart addition to a lego excavator too.
In the end I didn't bother with this in the interests of parsimony. But as you
say, there is always tomorrow.
Jennifer
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| |
|
In lugnet.technic, Jennifer Clark wrote:
> In lugnet.technic, Steven Lane wrote:
> > I watched Jen's digging vid and I think all she needs is a bit more
> > practice.
>
> You want to watch that mouth of yours pal :-) Seriously though, it was indeed
> not my best digger performance. Conditions were not ideal on the beach and I was
> trying to stay out of camera shot and keep the filming concise etc. In addition
> to this....
>
> > I think when digging you should dig with the elbow and use the bucket's crowd
> > feature last.
>
> Indeed so, scraping the dirt along with the dipper is the right thing to do,
> then curling the bucket to scoop before lifting it out with the boom. The
> trouble was that the dipper on the model did not have enough breakout force to
> initially shift the sand, but the bucket did, so I had to jiggle the bucket
> about a bit to either loosen up the sand and/or get the ideal leverage point for
> the dipper, and then the dipper could be moved.
I recind my comment about you needing practice :-),wet sand is the worst type.
>
> The fact that it dug damp sand at all was enough for me; I had half expected
> that it would not be able to.
>
>
> > My prediction for the future is maybe using different source's of air for
> > different functions. Jen's bucket crowds very quickly because it's powered at
> > the same pressure as that used to raise the 4 rams of the arm. If you had a
> > second supply at quarter pressure the two functions would be more proportional
> > to each other.
>
> Yes, I had thought about doing something similar for this model but for a
> different reason. With independent pumps for each function then all functions
> could be performed simultaneously rather than the air flowing down the easiest
> route. I based this on the real JS220 which has 2 hydraulic circuits for the
> boom functions. These can be combined into one for extra force, this could be
> quite a smart addition to a lego excavator too.
Thats an even better idea I might borrow (blatantly steal :-) it!
Steve
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> The functions aren't 'digital like", I know because I too have a digger just
> like Jennifer's. You can move the sticks slightly and get a proportional output.
Yeah, I know, I know. But "digital like" was a term that I figured most people
would understand, and perhaps even apriciate if your initials are K.C. :)
Then enters the "ooh, I can beat this foreign kid in the language game"-brat...
:P
Heck, the 8462 Tow Truck can't be used w/o careful manouvering of the sticks.
Not to mention the rudders on my Hercules that used the small cylinders...
And Steve, don't you have some HTML to code?
*falls back trying to
learn-brickOS-in-less-then-24h-and-get-it-running-on-my-w2k-laptop*
At least the shelf life on the RCX had not expired!
With the glimpse in the eye,
/Tobbe
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|
In lugnet.technic, Steven Lane wrote:
>
> Hi Tobbe
>
> The functions aren't 'digital like", I know because I too have a digger just
> like Jennifer's. You can move the sticks slightly and get a proportional output.
>
> I built my model to test the dual axis control mechanism I came up with that Jen
> name-checks on her site (thanks Jen).
>
> Even when operating the arm in the down direction you can still regulate it's
> speed if you have a deft touch on the sticks.
>
> I watched Jen's digging vid and I think all she needs is a bit more practice. It
> can be tricky as I know when I tried demonstrating the device at a Legofest.
> And I don't suppose she has too many opportunities to take the model to the
> beach.
>
> I think when digging you should dig with the elbow and use the bucket's crowd
> feature last.
>
> My prediction for the future is maybe using different source's of air for
> different functions. Jen's bucket crowds very quickly because it's powered at
> the same pressure as that used to raise the 4 rams of the arm. If you had a
> second supply at quarter pressure the two functions would be more proportional
> to each other.
>
> Steve
A comment on how you might be able to control the speed of pneumatics is to add
an orifice to both of the line of the cylinder. This would regulate the amount
and speed of the air entering and leaving the cylinder. Hope this gives you some
ideas.
Thanks
PS I love the model. I think Lego should give you a job Jennifer, designing
models and selling you current ones. Do you destroy (take apart) your models? It
would be hard for me after spending weeks building it.
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In lugnet.technic, Jonathan MacIntyre wrote:
>
> PS I love the model. I think Lego should give you a job Jennifer, designing
> models and selling you current ones. Do you destroy (take apart) your models? It
> would be hard for me after spending weeks building it.
I keep most of them built up these days, you are right, it is definitely hard to
take these apart, they take months to build...
Really the only time I think about taking a model apart is when it is superceded
by a better one.
Jennifer
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In lugnet.announce.moc, Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> <http://www.genuinemodels.com/>
>
> The model is pneumatic/electric and is operated by a separate hand controller
> which also contains the pneumatic pump and pressure cutoff switch. Purists
> will hopefully forgive me for my previous indiscretions since this model is
> 100% Lego!
>
> Jennifer
Oh, wow.
This is yet another raising of your bar, Jennifer; I'm really,
really impressed with the integration of the pneumatics and
the fidelity of scale and appearance. This is just gorgeous,
with a tremendous write-up. And it's so, well, yellow!
Hey, I'm going to be in the UK from January to May, so maybe
if there's a meet, I'll even get to see this beauty in person.
(Or else, perhaps at the next Brickfest!) But even in virtual
presence, this is absolutely stunning. Wowowowowowow.
all best
LFB
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In lugnet.technic, Lindsay Frederick Braun wrote:
>
> This is yet another raising of your bar, Jennifer; I'm really,
> really impressed with the integration of the pneumatics and
> the fidelity of scale and appearance. This is just gorgeous,
> with a tremendous write-up. And it's so, well, yellow!
Thanks for the comments Lindsay, it is good to hear that the model is working
visually. One of my concerns was that the boom would look "bitty" with all the
workings such as pneumatic hoses, cylinder guides etc not present on the real
excavator on it. I tried to disguise this as much as possible.
BTW I tried to mail you about this, but am getting a reply saying your mailbox
is full.
Jennifer
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Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model and
> placed it online here :-
>
> http://www.genuinemodels.com/
Another great model, time to change wallpaper at work :-)
(It's your rendered truck for the moment)
I want one! But I can't afford it, neither the Lego nor the time.
How on earth do you find the time to finish off projects like this? And all
that documenting! Don't you get tired of the project when the building is
done?
The only thing I dislike is the color scheme on the web pages - white on
black drives my eyes crazy, and I have top stop watching your model for a
while, then go back and continue. It's not just your page, any page with
dark background is hitting my eyes hard :-(
--
Anders Isaksson, Sweden
BlockCAD: http://user.tninet.se/~hbh828t/proglego.htm
Gallery: http://user.tninet.se/~hbh828t/gallery/index.htm
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| |
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In lugnet.technic, Anders Isaksson wrote:
>
> How on earth do you find the time to finish off projects like this?
The models do take a very long time (many months), and sometimes I can spend
days on relatively trivial parts like the upper part of the cab, and then change
it to something else entirely later. It's just an incremental thing really, I
don't expect the model to be finished overnight, and patience is the key.
> And all
> that documenting! Don't you get tired of the project when the building is
> done?
Not at all :-) Taking the photos and videos is fun, and writing up the project
is nothing in time and effort compared with actually building the model. I enjoy
it also, it's just like talking to someone about your favourite MOC.
> The only thing I dislike is the color scheme on the web pages - white on
> black drives my eyes crazy, and I have top stop watching your model for a
> while, then go back and continue. It's not just your page, any page with
> dark background is hitting my eyes hard :-(
Interesting, maybe it is a personal preference, I don't mind it so much and
indeed bright white background with black text sometimes tires my eyes. What is
your prefence for colours? Is it a common concensus that a black background is
tiring on the eyes? I'd be interested to hear more about this.
Jennifer
| | | | | | | | | | | | | | | | | | | | | | |
In lugnet.technic, Jennifer Clark wrote:
> In lugnet.technic, Anders Isaksson wrote:
>
> > The only thing I dislike is the color scheme on the web pages - white on
> > black drives my eyes crazy, and I have top stop watching your model for a
> > while, then go back and continue. It's not just your page, any page with
> > dark background is hitting my eyes hard :-(
>
> Interesting, maybe it is a personal preference, I don't mind it so much and
> indeed bright white background with black text sometimes tires my eyes. What is
> your prefence for colours? Is it a common concensus that a black background is
> tiring on the eyes? I'd be interested to hear more about this.
When coding (i.e. 90% of my computer time, I prefer white on black, but on web
pages that presentation style does not work for me.
>
> Jennifer
Kevin
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In lugnet.technic, Kevin L. Clague wrote:
>
> When coding (i.e. 90% of my computer time, I prefer white on black, but on web
> pages that presentation style does not work for me.
It is interesting you say that, because that was one of the reasons I chose the
colour scheme for the website. I like to do my coding in xterms with black
backgrounds and sometimes even green text for the true "days gone by" effect.
I suppose you can't keep everyone happy all the time :-)
Jennifer
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In lugnet.announce.moc, Jennifer Clark wrote:
| |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists
will hopefully forgive me for my previous indiscretions since this model is
100% Lego!
|
Fantastic! And in the continuing tradition of truely excellent models in both
form and function. I have to admit to having had a little preview peek of this
model a few days ago and have been awaiting its “official” release on lugnet
with great anticipation ever since.
Then, the announcement finally came out and imagine my horror - 100% genuine
Lego parts throughout! What!!! Not a single drilled, cut, ground, scraped or
otherwise mutilated part anywhere.
Seriously though, I stand in awe of the skill that turns buckets of bricks into
masterpieces like this.
Congrats, Jen, you’ve done it again!
JB
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In lugnet.announce.moc, Jennifer Clark wrote:
| |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists
will hopefully forgive me for my previous indiscretions since this model is
100% Lego!
Jennifer
|
Holy plastic...
THAT’S the Technic sets that I want to see on the shelves of my local Toys R Us
!!!!! :-)
Thanks for sharing them.
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Wonderful Model! I saw the mpegs of it digging and moving etc. and I think it’s
amazing! I like the color. If I was rating it I would give it 9 of 10 even 10
of 10.
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| |
|
In lugnet.announce.moc, Jennifer Clark wrote:
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> <http://www.genuinemodels.com/>
Jen,
Some things I really liked:
• Gear reduction in the car body, as opposed to being located in the
superstructure. A nice solution to the backlash problem with the tranmission
parts.
• Use of transmission parts to create the concentric drive shafts through the
turntable. (a most excellent approach ;-)
• Anti-rotation guides for the doubled cylinders. I experienced this problem
with my R996. (Fortunately, I had doubled sets on each segment of the boom, and
I simply tied them together laterally with an axle.) But your guides solve the
problem and it looks great.
• Overall shape and appearance of the body is excellent. The curves, the snot,
the colors- most excellent.
• Back to back connection of cylinders- very clever. I had to try this for
myself. It appears the cylinder bottoms can slide a little, but only with
significant force. I conclude that the connection is tight enough to keep
anything from slipping during normal operation.
I thought at first glance that this model is a little less impressive than your
AC-50. The AC-50 is larger, has more features, and is probably the best crane
MOC ever built. However, after thoroughly reading your webpage and seeing the
features and images of the JS-220, I think perhaps it's your best model yet.
It is small, but highly refined and well designed. All the necessary features
are present, and they operate well. It seems you sacrificed very little in
appearance to gain the required functions of the model. Building such realistic
MOCs are always a fine balance between function and appearance. You've achieved
both with the JS-220 and quite well.
Well done! The only comment I have is that you kept us in suspense for too long
with the release of your webpage! :-)
best,
TJ
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In lugnet.technic, Thomas Avery wrote:
| |
• Use of transmission parts to create the concentric drive shafts through the
turntable. (a most excellent approach ;-)
|
Indeed! I have namechecked you for that one.
| |
• Back to back connection of cylinders- very clever. I had to try this for
myself. It appears the cylinder bottoms can slide a little, but only with
significant force. I conclude that the connection is tight enough to keep
anything from slipping during normal operation.
|
They can move slightly, I’ve just looked at the leader picture and it can be
seen on the boom cylinders :-
| |
I thought at first glance that this model is a little less impressive than
your AC-50.
|
I know exactly what you mean, and certainly it is less exciting in sheer number
of functions than the AC50-1, but personally I think there is something better
about the JS220, although I am not exactly sure what. Being able to get detailed
photos of the real machine before finishing the model helped a lot I think, very
little was left to guesswork, although in some ways this makes life more
difficult as there can be less fudges in appearance.
Jennifer
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On Wed, Nov 26, 2003 at 05:45:30PM +0000, Jennifer Clark wrote:
> Interesting, maybe it is a personal preference, I don't mind it so
> much and indeed bright white background with black text sometimes
> tires my eyes. What is your prefence for colours? Is it a common
> concensus that a black background is tiring on the eyes? I'd be
> interested to hear more about this.
I prefer the light on dark colorscheme. But I'd recommend just having
several CSS files lying about, and allow the user to pick which one is
used (or even use their own :)
But that's just me :)
--
Dan Boger
dan@peeron.com
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In lugnet.publish, Dan Boger wrote:
>
> I prefer the light on dark colorscheme. But I'd recommend just having
> several CSS files lying about, and allow the user to pick which one is
> used (or even use their own :)
>
> But that's just me :)
Sounds reasonable, although it would probably be difficult to retrofit, given
that the rendered images on the website have black rather than transparent
backgrounds and would not look correct. The fact that I know nothing about CSS
would make this even more difficult.
Do you have any links to sites of the type you mention?
Jennifer
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| |
|
At 01:16 PM 11/26/2003, you wrote:
> In lugnet.publish, Dan Boger wrote:
> >
> > I prefer the light on dark colorscheme. But I'd recommend just having
> > several CSS files lying about, and allow the user to pick which one is
> > used (or even use their own :)
> >
> > But that's just me :)
>
> Sounds reasonable, although it would probably be difficult to retrofit, given
> that the rendered images on the website have black rather than transparent
> backgrounds and would not look correct. The fact that I know nothing about CSS
> would make this even more difficult.
>
> Do you have any links to sites of the type you mention?
>
> Jennifer
Jennifer,
CSS is super-easy to learn - pretty much just one line of ASP and one or
two text files containing a few lines of definitions. How to let the user
pick is not something I've had experience with. My home website
(http://www.roboticsresources.com/aerandir/index.php) uses a CSS style
sheet. (the CSS file is /style.css)
You're right - it would be difficult to retrofit because you'd have to
rename every page in your website to a .asp or .php. It's a small price to
pay for the flexibility to change instantly at any time the look and style
of the entire website.
Regarding the images, making the black backgrounds transparent would be
trivial. Paint Shop Pro or GIMP or Photoshop can all do it very easily. I
can do it if you like, it wouldn't take me long. Unfortunately it means
converting gif's or png's, both of which have drawbacks.
~Mike
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On Wed, Nov 26, 2003 at 06:41:29PM +0000, Mike Thorn wrote:
> You're right - it would be difficult to retrofit because you'd have to
> rename every page in your website to a .asp or .php. It's a small
> price to pay for the flexibility to change instantly at any time the
> look and style of the entire website.
Pft. You don't need to do that - just need to add a <link> tag (I
believe) to the header and you're all set. Don't even need to make it
smart - all the pages can point to a css that's really a dynamic file,
and that will output content based on a cookie or something like that.
All nice and easy in theory - I'll let you know if I ever implement
something like it :)
As for a site that uses something like that, try perlmonks.org.
Dan
--
Dan Boger
dan@peeron.com
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| |
|
In lugnet.publish, Dan Boger wrote:
> On Wed, Nov 26, 2003 at 06:41:29PM +0000, Mike Thorn wrote:
> > You're right - it would be difficult to retrofit because you'd have to
> > rename every page in your website to a .asp or .php. It's a small
> > price to pay for the flexibility to change instantly at any time the
> > look and style of the entire website.
>
> Pft. You don't need to do that - just need to add a <link> tag (I
> believe) to the header and you're all set. Don't even need to make it
> smart - all the pages can point to a css that's really a dynamic file,
> and that will output content based on a cookie or something like that.
>
> All nice and easy in theory - I'll let you know if I ever implement
> something like it :)
>
> As for a site that uses something like that, try perlmonks.org.
You may want to give a slightly better clue, it didn't jump out at me where to
change stylesheets to get your own style. True, I didn't spend a lot of time
digging but you're the one advocating the technique so it's on you to provide
the good clue.
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On Thu, Nov 27, 2003 at 01:53:07PM +0000, Larry Pieniazek wrote:
> > As for a site that uses something like that, try perlmonks.org.
>
> You may want to give a slightly better clue, it didn't jump out at me
> where to change stylesheets to get your own style. True, I didn't
> spend a lot of time digging but you're the one advocating the
> technique so it's on you to provide the good clue.
You have to be logged in, at which time you can go to your "user
settings" page [1], and select the "theme" from a pulldown list.
[1] http://perlmonks.org/index.pl?node=user%20settings
--
Dan Boger
dan@peeron.com
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In lugnet.publish, Dan Boger wrote:
> On Thu, Nov 27, 2003 at 01:53:07PM +0000, Larry Pieniazek wrote:
> > > As for a site that uses something like that, try perlmonks.org.
> >
> > You may want to give a slightly better clue, it didn't jump out at me
> > where to change stylesheets to get your own style. True, I didn't
> > spend a lot of time digging but you're the one advocating the
> > technique so it's on you to provide the good clue.
>
> You have to be logged in, at which time you can go to your "user
> settings" page [1], and select the "theme" from a pulldown list.
>
> [1] http://perlmonks.org/index.pl?node=user%20settings
Thanks... do you have any other examples that don't require becoming a user of a
site? I'm not sure I'm ready to become a monk (even assuming I thought myself a
good enough perl coder) just to see what you're driving at.
In other words, you may want to give a slightly better clue, since you're the
one advocating the technique.
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At 06:16 PM 11/26/2003 +0000, Jennifer Clark wrote:
> [snip] The fact that I know nothing about CSS
> would make this even more difficult.
http://www.htmlhelp.com/reference/css/
This site was what I needed to learn CSS. I know you can download the
"manual" in several versions, but I don't have the exact URL.
Have fun,
--Ryan
http://users.ifriendly.com/fourfarrs1
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In lugnet.announce.moc, Jennifer Clark wrote:
snip
Beautful job Jennifer!
As per usual, you always impress me with your MOCS!
Keep up the great work!
Dave K
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Hi Jennifer,
Very very nice. It looks well built, well written (I wish I could write as
well), and as always, well displayed! You are a master.
Sincerely,
Paul
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In lugnet.announce.moc, Jennifer Clark wrote:
| |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists
will hopefully forgive me for my previous indiscretions since this model is
100% Lego!
Jennifer
|
Very nice,
Jam-packed with functional mechanisms inside, clean and polished outside. In my
opinion, these are the signs of a true master technic builder.
-James
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| |
|
In lugnet.technic, Jennifer Clark wrote:
> In lugnet.technic, Anders Isaksson wrote:
> > The only thing I dislike is the color scheme on the web pages ...
>
> Interesting, maybe it is a personal preference, I don't mind it so much and
> indeed bright white background with black text sometimes tires my eyes.
Any high contrast scheme will tire the eyes, be it black on white or white on
black.
But there's more:
I don't have very good sight, wearing strong glasses (-9.5, -9.75 if that tells
you anything). Also only use one eye at a time (anyone of them, but not both
together).
I don't mind B/W so much on a really monochrome screen, as there it's only one
dot on screen for one pixel. On a color screen there are three dots (R,G,B) for
a pixel, not exactly in the same place. This introduzes a fuzziness in the
pixel. This fuzziness is quite enlarged by the 'chromatic abberation' (sp?
word?) in my glasses. Turning a bit to the side, I see the letters getting one
blue, and one red side :-)
This effect is more accentuated when the letters are lighted, better when the
letters are dark.
> What is your prefence for colours?
I find light yellowish background with black text quite nice.
AndersI
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In lugnet.announce.moc, Jennifer Clark wrote:
| |
I have finished the webpage for my JCB JS220 Excavator model and placed it
online here :-
http://www.genuinemodels.com/
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch. Purists
will hopefully forgive me for my previous indiscretions since this model is
100% Lego!
Jennifer
|
Hi Jennifer,
Excellent model! I really enjoyed playing with it in Geldermalsen. And I works
smoothly.
The only thing I’m wondering is how long it takes before the power is gone. I
mean, using five motors you must have powerfull batteries.
I’m building my own excavator now. It will be a classic one.
Best regards,
Dennis
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In lugnet.technic, Dennis Bosman wrote:
| |
The only thing I’m wondering is how long it takes before the power is gone. I
mean, using five motors you must have powerfull batteries.
|
While the model works with the standard Lego battery box as shown, I usually run
it from 8 NiMH rechargeables giving 9.6V. These are housed in the back of the
superstructure in the same place as the battery box. At exhibitions when the
excavator is in constant use, I’d expect to change the batteries once or twice a
day
| |
I’m building my own excavator now. It will be a classic one.
|
Excellent! I look forward to seeing that.
Jennifer
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| |
|
Hi Jennifer
It was definitely worth to wait for your newest marvel! It’s wheter a CAT nor a
Liebherr - finally a model that is truly different from what we’ve seen so far
;-)
When I saw the first pictures, I thought 1x6 tiles on the crawlers would look
great. But then I downloaded the action videos and had to realize that the tiles
would fall off quickly in such heavy duty applications.
It is most impressing to see your model move and dig (I would never dare to use
my creations in such harsh environments) - congratulations!
Although your site is - once again - very easy to follow and the pictures show
lots of details, there is something I couldn’t find out yet. It concerns the
track rollers. How have you built them to realize a smooth ride? Did you use the
16 tooth clutch gears like TJ has in his R996?
Just an idea for the case you should looking for your next challenge: what about
implementing drive, steering and a (remote) control to the 8455 backhoe loader?
You still could make it look like a JCB or a Case :-)
Greetings from Switzerland
Beat
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In lugnet.technic, Beat Felber wrote:
| |
When I saw the first pictures, I thought 1x6 tiles on the crawlers would look
great. But then I downloaded the action videos and had to realize that the
tiles would fall off quickly in such heavy duty applications.
|
Very true. In addition to this, had I applied 1x6 tiles the superstructure would
have fouled on them when slewing, there was not enough clearance between the
superstructure and the tracks to allow the fitting of 1x6 tiles.
| |
It is most impressing to see your model move and dig (I would never dare to
use my creations in such harsh environments) - congratulations!
Although your site is - once again - very easy to follow and the pictures
show lots of details, there is something I couldn’t find out yet. It concerns
the track rollers. How have you built them to realize a smooth ride? Did you
use the 16 tooth clutch gears like TJ has in his R996?
|
I used quite a few of the black technic “axle pin with friction” for rollers,
but in fact they don’t actually roll, the tracks just slide over them. It seems
to work quite well.
There is more history to the tracks than on the site though; after doing the
videos the tracks seemed to have stretched a bit and therefore came off quite
easily when turning corners. To remedy this I spring loaded the non-driven 24
tooth gears holding the tracks to keep them tight no matter how stretched the
tracks get, and it seems to work well. I’ll put some more information about this
on the website when I get the CAD stuff for it done.
| |
Just an idea for the case you should looking for your next challenge: what
about implementing drive, steering and a (remote) control to the 8455 backhoe
loader? You still could make it look like a JCB or a Case :-)
|
:-)
Have you seen the latest lego club magazine? They have a competition in it which
links the 8455 and a real JCB backhoe.
Jennifer
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| |
I used quite a few of the black technic “axle pin with friction” for rollers,
but in fact they don’t actually roll, the tracks just slide over them. It
seems to work quite well.
|
Never tried that one - nice space saving idea. What I tried some time ago was to
use plates with the studs on the side so that the track runs over the edge of
it. This allows to build very narrow track frames. If I remember right, in a
very old Dacta set, this idea was used to build a chain saw with the narrow
track links.
| |
There is more history to the tracks than on the site though; after doing the
videos the tracks seemed to have stretched a bit and therefore came off quite
easily when turning corners. To remedy this I spring loaded the non-driven 24
tooth gears holding the tracks to keep them tight no matter how stretched the
tracks get, and it seems to work well. I’ll put some more information about
this on the website when I get the CAD stuff for it done.
|
Looking forward to it.
| |
Have you seen the latest lego club magazine? They have a competition in it
which links the 8455 and a real JCB backhoe.
|
No, I haven’t. So far I haven’t become a world club member. Is it worth to do
so, except for the magazine?
Or is there a place on the net where a digital version of the club magazine can
be downloaded?
Beat
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In lugnet.technic, Beat Felber wrote:
| |
| |
I used quite a few of the black technic “axle pin with friction” for
rollers, but in fact they don’t actually roll, the tracks just slide over
them. It seems to work quite well.
|
Never tried that one - nice space saving idea. What I tried some time ago was
to use plates with the studs on the side so that the track runs over the edge
of it. This allows to build very narrow track frames. If I remember right, in
a very old Dacta set, this idea was used to build a chain saw with the narrow
track links.
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In my crawler crane I used axle pins with 1/2 bush on them, see
here.
These didnt really rotate much either, but the bush fitted nicely in the centre
of the tracks keeping them nicely aligned. Of course mine wasn’t motorised...
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There is more history to the tracks than on the site though; after doing the
videos the tracks seemed to have stretched a bit and therefore came off
quite easily when turning corners. To remedy this I spring loaded the
non-driven 24 tooth gears holding the tracks to keep them tight no matter
how stretched the tracks get, and it seems to work well. I’ll put some more
information about this on the website when I get the CAD stuff for it done.
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Looking forward to it.
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This may be helped by the above method - there’s a lot of sideways movement of
the tracks when turning, which is probably a major contributor to the
stretching. Do the treads come apart more easily after the stretching? And does
it stretch to the limits of the spring loaded gears?
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Have you seen the latest lego club magazine? They have a competition in it
which links the 8455 and a real JCB backhoe.
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No, I haven’t. So far I haven’t become a world club member. Is it worth to do
so, except for the magazine?
Or is there a place on the net where a digital version of the club magazine
can be downloaded?
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If not can someone do a scan of this page and post it please?
Regards
ROSCO
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beat.felber@fhso.ch (Beat Felber) wrote in <HpC78s.1szu@lugnet.com>:
> > I used quite a few of the black technic "axle pin with friction" for
> > rollers, but in fact they don't actually roll, the tracks just slide
> > over them. It seems to work quite well.
>
> Never tried that one - nice space saving idea. What I tried some time
> ago was to use plates with the studs on the side so that the track runs
> over the edge of it. This allows to build very narrow track frames. If I
> remember right, in a very old Dacta set, this idea was used to build a
> chain saw with the narrow track links.
The disadvantage of this construction is that the track links are liable to
snag on the edges of the plate.
--
Harro de Jong
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Hello
Could you please let us know when you have posted the CAD files. I would love to
build one.
Thanks
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At 05:45 PM 11/26/2003 +0000, Jennifer Clark wrote:
> Interesting, maybe it is a personal preference, I don't mind it so much and
> indeed bright white background with black text sometimes tires my eyes.
> What is
> your prefence for colours? Is it a common concensus that a black background is
> tiring on the eyes? I'd be interested to hear more about this.
>
> Jennifer
I don't mind black on white, but I find white on black a bit too
contrasting. IMO, silver on black is better.
Cheers,
--Ryan
http://users.ifriendly.com/fourfarrs1/artron (example of silver on black)
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Hello
I have been trying to build a model based on this one. But I have been
having trouble on how to connect the boom or arm to the super structure. If
anyone has any idea please share.
Thanks
"Jennifer Clark" <jen@vulture.dmem.strath.ac.uk> wrote in message
news:HovtHu.nFK@lugnet.com...
> I have finished the webpage for my JCB JS220 Excavator model and placed it
> online here :-
>
> <http://www.genuinemodels.com/>
>
> The model is pneumatic/electric and is operated by a separate hand • controller
> which also contains the pneumatic pump and pressure cutoff switch. Purists • will
> hopefully forgive me for my previous indiscretions since this model is • 100%
> Lego!
>
> <<http://www.genuinemodels.com/images/js220/figure_2_1_CRW_1567_thmb.jpg>>
>
>
<<http://www.genuinemodels.com/images/js220/figure_2_13_CRW_1548_thmb.jpg>>
>
>
> Jennifer
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In lugnet.technic, Jonathan MacIntyre wrote:
| |
Hello
I have been trying to build a model based on this one. But I have been
having trouble on how to connect the boom or arm to the super structure. If
anyone has any idea please share.
Thanks
|
Hi Jonathan,
What exactly is your problem? Doesn’t fit the arm to the superstructure or is
the superstructure too weak? Do you have pictures of your work in progress?
Dennis Bosman
LEGO Trucks & Heavy Equipment
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In lugnet.technic, Dennis Bosman wrote:
| |
In lugnet.technic, Jonathan MacIntyre wrote:
| |
Hello
I have been trying to build a model based on this one. But I have been
having trouble on how to connect the boom or arm to the super structure. If
anyone has any idea please share.
Thanks
|
Hi Jonathan,
What exactly is your problem? Doesn’t fit the arm to the superstructure or is
the superstructure too weak? Do you have pictures of your work in progress?
Dennis Bosman
LEGO Trucks & Heavy Equipment
|
Hello
Here is a link to a MLcad file:
http://www3.telus.net/ddmtrans/Loader 2.mpd
I don’t have enough Lego pieces to build the whole thing so I have been
experimenting with what I do have and then building in MLcad. The only trouble I
am having is to do with the front part of the super structure. I am unable to
get the arm attached firmly. I don’t what it to fall off when I use it. If you
have a CAD file of a method or some pics it would be delightful.
Thanks
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In lugnet.announce.moc, Jennifer Clark wrote:
Simply amazing! The superstructure design and detail is so close to the real
JS220 that at a glance it is difficult to discern between real and Lego. What
makes it more amazing is the amount of mechanical stuff underneath the
superstructure. The fact everything works (digging arm, tracks) and works well
makes the model that much better.
| |
The model is pneumatic/electric and is operated by a separate hand controller
which also contains the pneumatic pump and pressure cutoff switch.
|
By any chance do you have a dat file of the hand controller? The controller
might be the best part of the model, and I’d like to try a similar controller
for a fairly large scale skid-steer vehicle I’m working on.
Well anyway, keep the cool models rolling out.
Max
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In lugnet.technic, Max Maxwell wrote:
| |
By any chance do you have a dat file of the hand controller? The controller
might be the best part of the model, and I’d like to try a similar controller
for a fairly large scale skid-steer vehicle I’m working on.
|
Hi Max,
The hand controller is very easy to build. After seeying Jennifer’s model on the
Modelshow Europe earlier this year I immediately started to build my own unit
without having pictures of hers.
Dennis Bosman
LEGO Trucks & Heavy Equipment
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