Subject:
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Re: SSClagorpion - Status Report
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 18 Dec 2004 16:49:14 GMT
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Viewed:
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26455 times
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Well I have a leg design at current using 2 large cylinders that gets ~21
cycles/minute with 1 leg and a 6 way radial pump (I don't have enough pumps to
fill out the full 12 way...) but it's sturdy and strong and fully self
cycling...the problem is working a circuit to have 4 legs moving in tandem at a
time.. so I'm looking into a linkage design to handle the forward-backward
motion and a wired linkage design for the up-down motion..., how are you
planning your legs? individual motion with cylinders on all? how many
cylinders/leg?
The travel on a large cylinder seems to be ~5 studs, while the switch throw is
3 end to end.. is that about right?
I've found I can avoid the leakage if I'm using the cylinders in oblique angles,
thus minimizing the leteral torque, but I coud be wrong...
Mine is mostly Black and yellow as that is what I have the most of.. alas some
white has intruded as well...
Given my current design, it's going to be huge.. on the order of 2'x3'... does
that sound similar?
In lugnet.technic, Kevin L. Clague wrote:
> Hi Joseph,
>
> There is not much for new news. I have done some study of "limited throw"
> pneumatics. One of the things that makes the larger pneumatic pistons slower
> than the small ones is the 6x volume difference compared to small pistons.
>
> The travel distance of the large piston is larger than the distance traveled
> by a handle on a switch. By limiting the piston throw to the distance of the
> switch throw, then you effectively reduce the volume of the large piston. It
> also provides improved reliability. The large pistons tend to leak when fully
> expanded. The increased leverage makes it easier to break the seal.
>
> I've asked Santa for many red LEGO technic sets this year, and plan to start
> working again soon.
>
> Real life has been getting in the way of LEGO lately. It is work again. I'm
> getting paid to perform unnatural acts (OK, pretending I'm alpha particles) with
> computers.
>
> Kevin
>
>
>
> In lugnet.technic, Joseph Greene wrote:
> > Ok, It's December now...any status changes? I've gotten exhausted holding my
> > breath, so I've begun my own.. but must wait until January to buy the rest of
> > the parts I need...
> >
> >
> > In lugnet.technic, Kevin L. Clague wrote:
> > > In lugnet.technic, Joseph Greene wrote:
> > > > In lugnet.technic, Eric Sophie wrote:
> > > > <SNIP>
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Message has 1 Reply:
 | | Re: SSClagorpion - Status Report
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| (...) 21 cyles per second is good. It will go much slower with 7 more legs. Do you plan on having all the legs be self cycling? How will the legs stay coordinated? I plan on one pison for vertical, and one (maybe two) for horizontal. Do you know the (...) (20 years ago, 19-Dec-04, to lugnet.technic)
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Message is in Reply To:
| | Re: SSClagorpion - Status Report
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| Hi Joseph, There is not much for new news. I have done some study of "limited throw" pneumatics. One of the things that makes the larger pneumatic pistons slower than the small ones is the 6x volume difference compared to small pistons. The travel (...) (20 years ago, 18-Dec-04, to lugnet.technic)
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