Subject:
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Re: Vehicle with square wheels
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 14 Dec 2005 21:05:12 GMT
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Viewed:
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6218 times
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In lugnet.technic, Philippe Hurbain wrote:
> In lugnet.technic, Jordan Bradford wrote:
> > Fantastic work. I hadn't even started my attempt. I like your using the
> > battery box as the weight -- it's very simple and compact.
> >
> > I noticed from the video that it tends to veer left. Are the wheels losing
> > traction when they're fully flat?
>
> I think the veer left comes from gear backlash. Front and rear wheels are not
> maintained strictly 22.5° apart and the way it works, this introduces left/right
> dissymetry. My first attempt used 3 z24 gears with less backlash but of couse I
> could only offset front and rear by 15° or 30° and it didn't work.
>
> Philo
I built one similar to yours last night (I put gears on both sides as an
experiment). You're correct that it's the gear backlash that causes the wheels
to not quite turn at the same time. Pushing the wheels down manually with your
finger is a good way to watch it happen because the process is slower.
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Message has 1 Reply:
 | | Re: Vehicle with square wheels
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| Here is my attempt (not as elegant as Philo's!) I used old half bushes in a slightly different way. Gear lash seems pretty low. The gear train for the rotating weight needs some work though... (URL) Alexander (18 years ago, 15-Dec-05, to lugnet.technic)
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Message is in Reply To:
| | Re: Vehicle with square wheels
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| (...) I think the veer left comes from gear backlash. Front and rear wheels are not maintained strictly 22.5° apart and the way it works, this introduces left/right dissymetry. My first attempt used 3 z24 gears with less backlash but of couse I (...) (18 years ago, 12-Dec-05, to lugnet.technic)
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