Subject:
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Re: PC <> RCX Communication?
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 29 Nov 1999 12:23:10 GMT
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Viewed:
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864 times
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> Could you suggest the tweaking mechanism for the 'dead time' of gears.
> I am facing similar situation with a plotter that I am trying to program • on
> RCX. The length of a lines drawn with motor moving for same time in • opposite
> directions is not the same. There is an ratio of 5:6 in the length of the
> two lines.
>
> Could you suggest how you toubleshoot it?
The solution I came up with was to measure the time it took the gear train
to go from one direction - through it's dead zone - to biting in the other
direction.
Then whenever the gear train needs to switch direction, have the motor come
on for that amount of time. Experiment further and tweak this value until
you get it perfect...
Another solution would be to try to eliminate dead time in the mechanics, by
using chain over the gears or (if you need it geared down a lot) use the
tiny axle cover to one of the large white wheels with a yellow rubber band,
then again until you get the ratio you want. [I'm not too fluent in
part-speak]
> Maneesh
HTH,
Kornel Lambert (Email: kornel@black-hole.co.uk) (Mobile: 0780 885 3178)
(Phone: 0181 408 0796) (PGP Key: www.kornel.com/pgp.asc)
(Email-to-Pager: pager@kornel.com) (Web: www.kornel.com)
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Message is in Reply To:
 | | Re: PC <> RCX Communication?
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| (...) Hi! Could you suggest the tweaking mechanism for the 'dead time' of gears. I am facing similar situation with a plotter that I am trying to program on RCX. The length of a lines drawn with motor moving for same time in opposite directions is (...) (25 years ago, 29-Nov-99, to lugnet.robotics)
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