Subject:
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Re: JCB JS220 Excavator
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 25 Nov 2003 01:47:12 GMT
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Viewed:
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3761 times
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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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Message has 1 Reply:
 | | Re: JCB JS220 Excavator
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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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