Subject:
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Re: 2 Motors -> 1 axle
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 7 Jan 2000 23:05:15 GMT
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Viewed:
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557 times
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J G Gregory wrote:
> > Unfortunately, the motors were different enough that the gears actually
> > skipped teeth occasionally. Running in one direction would probably be
> > OK, but in this application I'm switching direction constantly, and it
> > didn't work. Also, even if the gears remained meshed, it's not an
> > effective use of the power in the motors: one of them is always pulling
> > the other one along, robbing the whole system of power.
>
> I think you are drawing entirely the wrong conclusions. As others have
> said, your mechanical connection is at fault, not the differences between
> motors.
I absolutely agree with that: better mechanics would prevent the skipping
teeth problem.
> Two motors are better than one. Period. (assuming they are going
> in the same direction ;-) They do not interfere with each other.
I'm not convinced of that, at least not yet. It seeems to me that if
there was enough differential force to skip teeth AT ALL, then even if I
force the skipping to stop, that differential force is still there, and
the motors will still be fighting each other. I agree that it will still
be better than only one motor, but I don't think it will be as good 2
that don't struggle with each other.
The differential solution, while it may add a small amount of frictional
loss, lets each motor contribute what it can without interfering with the
other.
Dave Johnson
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Message has 2 Replies:
 | | RE: 2 Motors -> 1 axle
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| If the two motors are supplied with similar electrical power, and there is any real work to be done, then the two motors will not "fight" each other. They will each contribute their part to get the work done. There is no need for any fancy (...) (25 years ago, 7-Jan-00, to lugnet.robotics)
| | | Re: 2 Motors -> 1 axle
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| Dave Johnson <djohnson@sirius.com> wrote in message news:0FNZ00K0NMSRQ3@...pbi.net... (...) There is no "differential force". At least nothing you could measure. The teeth are skipping because of inertia in the things that are connected to them. (...) (25 years ago, 8-Jan-00, to lugnet.robotics)
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