Subject:
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Re: Site updated
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 18 Aug 2001 18:28:29 GMT
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Viewed:
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1052 times
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In lugnet.technic, Steve Lane writes:
> In lugnet.technic, Jennifer Clark writes:
> > Interesting that you are using ungeared 9V motors for the tractor - is this
> > due to them being more powerful or because of a shortage of geared motors?
>
> The speed the gearbox runs at is quite high, I only reduce the
> motor speed by a factor of 5 before sending it to the gearbox. If you used a
> gear motor the revs that came out of the gearbox in first gear would be
> totally transmisson twisting :-).
I've been thinking about this question again today and after 2 minute's
research at:
http://web.mit.edu/sp.742/www/motor.html
I found out that the speed difference between the gear motor compared with a
non-geared motor geared down by a factor of five is only 33%. Therefore you
probably could use a gear motor in conjunction with a gearbox. I still think
though that replacing 3 or 4 non-geared motors with a corresponding number
of gear motors would produce two much torque. Maybe 1 gear motor should
substitue 2 non-gear motors. I think this because on the page listed above
it says that the gear motor is a lot harder to stall.
I will now rig up the Rotinoff with two gear motors and report back with the
results.
Steve
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Message has 1 Reply:
 | | Re: Site updated
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| (...) Excellent, we need some real science in this stuff for sure :-) My hunch is still that when geared down to the same rpm the ungeared motors deliver the greater torque, although admittedly I have never done a proper test to establish this. As (...) (23 years ago, 20-Aug-01, to lugnet.technic)
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Message is in Reply To:
| | Re: Site updated
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| (...) I'm particulary proud of my suspension because it's fully independant and hardness adjustable. (...) I suspect they do too. I notice in war films the track, just before it feeds back onto the rear drive sprocket, actually travels in a slight (...) (23 years ago, 30-Jul-01, to lugnet.technic)
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