Alt-BEAM Archive

Message #10139



To: beam@sgiblab.sgi.com
From: "Dennison Bertram" dibst11+@pitt.edu
Date: Sat, 12 Feb 2000 19:23:18 -0500
Subject: [alt-beam] Re: Geared Motors


I suppose, I made a general assumption because It's far to easy for a
begginner to get discouraged easilly after spending alot of money on a bad
pair of gearmotors. My generalizations while broad, will probably get you a
pretty nice gearmotor if you find one that fit's my charecteristics.

dennison

Dennison Bertram wrote:
>
> ... 10:1 gear ratio won't work. That is much to low. And
> you don't want something that starts at 6volts you want a
> motor that actually tops out at around 5volts.

Actually, I've got some very nice gearmotors rated at 12 volts / 60:1
gear ratio. They have a no-load speed of around 50 RPM.

Now, these things run (with nice torque) with a 3 volt supply, and a
loaded speed of 10 RPM.

SO ... don't make too many broad assumptions. With high quality
gearmotors, you can often run them at much lower voltages then they are
rated for, with a corresponding reduction in speed.

The moral is: if you have the money, buy one and try it. Or better yet,
ask on this list if anyone has tried the same gearmotor and what their
experience was.

Regards,
Bruce

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