 | | JCB JS220 Excavator —Jennifer Clark
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| | | I have finished the webpage for my JCB JS220 Excavator model and placed it online here :- (URL) The model is pneumatic/electric and is operated by a separate hand controller which also contains the pneumatic pump and pressure cutoff switch. Purists (...) (20 years ago, 25-Nov-03, to lugnet.announce.moc, lugnet.technic, lugnet.robotics, lugnet.build, lugnet.loc.uk, lugnet.modelteam, FTX) !!
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| | | | | Re: JCB JS220 Excavator —Ross Crawford
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| | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | | | | Re: JCB JS220 Excavator —Ross Crawford
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| | | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.technic, FTX)
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| | | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) One of these days :-) It is probably doable with the small pneumatic cylinder. (...) 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 (...) (20 years ago, 28-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Rob Stehlik
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| | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Larry Pieniazek
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| | | | | (...) 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... :-) (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) I knew someone would say that! It had to be you Larry :-) Jennifer (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Eric Hampusgård
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| | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | Re: JCB JS220 Excavator —Paul Kleniewski
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| | | | | "Jennifer Clark" <jen@vulture.dmem.strath.ac.uk> wrote in message news:HovtHu.nFK@lugnet.com... (...) this is nothing special :) it means jen made awsome model as usually it's marvelous many bows to you jen pixel (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | Re: JCB JS220 Excavator + en översättningsfråga —Eric Hampusgård
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| | | | | Hej! Först: Har ni inte sett Jennifer Clarks senaste mästerverk ska ni genast dit! (...) Sedan har jag en fråga: Hur översätter man "turntable" till svenska? Ordet "skivspelare" funkar inte riktigt bra för mig. Blir det "vridskiva", "snurrplatta" (...) (20 years ago, 25-Nov-03, to lugnet.loc.se)
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| | | | | | | Re: JCB JS220 Excavator + en översättningsfråga —Anders Isaksson
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| | | | | | | (...) Inte tittat än... (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.loc.se)
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| | | | | | | Re: JCB JS220 Excavator + en översättningsfråga —Henrik Johansson
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| | | | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.loc.se)
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| | | | | | | Re: JCB JS220 Excavator + en översättningsfråga —Joakim Olsson
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| | | | | | | klippetiklipp. (...) inte (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.loc.se)
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| | | | | | | Re: JCB JS220 Excavator + en översättningsfråga —Tore Eriksson
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| | | | | | (...) 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 (20 years ago, 27-Nov-03, to lugnet.loc.se)
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| | | | | Re: JCB JS220 Excavator —Eric Sophie
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| | | | | Woof! That looks great! Wow! You really know how to make 'em! e (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | Re: JCB JS220 Excavator —Adrian Egli
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| | | | | (...) 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. (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | Re: JCB JS220 Excavator —Tobbe Arnesson
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| | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | | | Re: JCB JS220 Excavator —Steven Lane
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| | | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | | | | | Re: JCB JS220 Excavator —Steven Lane
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| | | | | | | | (...) I recind my comment about you needing practice :-),wet sand is the worst type. (...) Thats an even better idea I might borrow (blatantly steal :-) it! Steve (20 years ago, 26-Nov-03, to lugnet.technic)
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| | | | | | | | Re: JCB JS220 Excavator —Tobbe Arnesson
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| | | | | | | (...) 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, (...) (20 years ago, 26-Nov-03, to lugnet.technic)
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| | | | | | | | Re: JCB JS220 Excavator —Jonathan MacIntyre
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| | | | | | (...) 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 (...) (20 years ago, 12-Dec-03, to lugnet.technic)
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| | | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (20 years ago, 12-Dec-03, to lugnet.technic)
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| | | | | Re: JCB JS220 Excavator —Lindsay Frederick Braun
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| | | | | (...) 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, (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (...) (20 years ago, 30-Nov-03, to lugnet.technic)
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| | | | | Re: JCB JS220 Excavator —Anders Isaksson
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| | | | | (...) (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 (...) (20 years ago, 25-Nov-03, to lugnet.technic)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (...) (20 years ago, 26-Nov-03, to lugnet.technic, lugnet.publish)
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| | | | | | | | Re: JCB JS220 Excavator —Kevin L. Clague
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| | | | | | (...) 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. (...) Kevin (20 years ago, 26-Nov-03, to lugnet.technic, lugnet.publish)
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| | | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.technic, lugnet.publish)
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| | | | | Re: JCB JS220 Excavator —John Barnes
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| | | | | (...) 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 (...) (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Stephane Simard
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| | | | | (...) 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. (20 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Erik Bush
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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. (20 years ago, 26-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Thomas Avery
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| | | | | (...) 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 (...) (20 years ago, 26-Nov-03, to lugnet.technic)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) Indeed! I have namechecked you for that one. (...) They can move slightly, I've just looked at the leader picture and it can be seen on the boom cylinders :- (URL) (...) I know exactly what you mean, and certainly it is less exciting in sheer (...) (20 years ago, 26-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Dan Boger
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| | | | | (...) 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 :) (20 years ago, 26-Nov-03, to lugnet.publish)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | | (...) 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 (...) (20 years ago, 26-Nov-03, to lugnet.publish)
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| | | | | | | | | Re: JCB JS220 Excavator —Mike Thorn
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| | | | | | | | (...) 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 ((URL) uses a CSS (...) (20 years ago, 26-Nov-03, to lugnet.publish)
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| | | | | | | | | | Re: JCB JS220 Excavator —Dan Boger
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| | | | | | | | (...) 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 (...) (20 years ago, 26-Nov-03, to lugnet.publish)
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| | | | | | | | | | Re: JCB JS220 Excavator —Larry Pieniazek
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| | | | | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.publish)
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| | | | | | | | | | Re: JCB JS220 Excavator —Dan Boger
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| | | | | | | | (...) 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] (URL) Dan Boger dan@peeron.com (20 years ago, 27-Nov-03, to lugnet.publish)
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| | | | | | | | | | Re: JCB JS220 Excavator —Larry Pieniazek
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| | | | | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.publish)
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| | | | | | | Re: JCB JS220 Excavator —Ryan Farrington
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| | | | | | (...) (URL) 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 (URL) (20 years ago, 1-Dec-03, to lugnet.publish)
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| | | | | Re: JCB JS220 Excavator —David Koudys
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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 (20 years ago, 26-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Paul Krieg
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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 (20 years ago, 27-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —James Loewen
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| | | | | (...) 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 (20 years ago, 27-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Anders Isaksson
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| | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.publish)
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| | | | | Re: JCB JS220 Excavator —Dennis Bosman
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| | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.technic, FTX)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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 (...) (20 years ago, 27-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Beat Felber
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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 (...) (20 years ago, 30-Nov-03, to lugnet.technic, FTX)
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| | | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | | | (...) 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. (...) I used quite a (...) (20 years ago, 1-Dec-03, to lugnet.technic, FTX)
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| | | | | | | | Re: JCB JS220 Excavator —Beat Felber
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| | | | | | | (...) 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 (...) (20 years ago, 3-Dec-03, to lugnet.technic, FTX)
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| | | | | | | | | Re: JCB JS220 Excavator —Ross Crawford
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| | | | | | | | | (...) In my crawler crane I used axle pins with 1/2 bush on them, see (URL) 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... (...) (...) (20 years ago, 3-Dec-03, to lugnet.technic, FTX)
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| | | | | | | | | Re: JCB JS220 Excavator —Harro de Jong
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| | | | | | | | beat.felber@fhso.ch (Beat Felber) wrote in <HpC78s.1szu@lugnet.com>: (...) The disadvantage of this construction is that the track links are liable to snag on the edges of the plate. (20 years ago, 4-Dec-03, to lugnet.technic)
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| | | | | | | | Re: JCB JS220 Excavator —Jonathan MacIntyre
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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 (20 years ago, 15-Dec-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Ryan Farrington
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| | | | | (...) 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 (URL) (example of silver on black) (20 years ago, 1-Dec-03, to lugnet.publish)
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| | | | | Re: JCB JS220 Excavator —Jonathan MacIntyre
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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 (...) (20 years ago, 18-Dec-03, to lugnet.technic)
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| | | | | | | Re: JCB JS220 Excavator —Dennis Bosman
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| | | | | | (...) 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 (URL) LEGO Trucks & Heavy Equipment> (20 years ago, 26-Dec-03, to lugnet.technic, FTX)
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| | | | | | | | Re: JCB JS220 Excavator —Jonathan MacIntyre
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| | | | | | (...) Hello Here is a link to a MLcad file: (URL) 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 (...) (20 years ago, 28-Dec-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Max Maxwell
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| | | | (...) 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. (...) (20 years ago, 24-Dec-03, to lugnet.technic, FTX)
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| | | | | | Re: JCB JS220 Excavator —Dennis Bosman
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| | | | (...) 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. (4 URLs) Dennis Bosman (URL) LEGO Trucks & (...) (20 years ago, 26-Dec-03, to lugnet.technic, FTX)
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