Newsgroups: comp.robotics
Path: brunix!uunet!spool.mu.edu!agate!deep.rsoft.bc.ca!mindlink!a50
From: Cliff_Lum@mindlink.bc.ca (Cliff Lum)
Subject: Re: direct drive motors?
Organization: MIND LINK! - British Columbia, Canada
Date: Tue, 29 Jun 1993 01:56:54 GMT
Message-ID: <25998@mindlink.bc.ca>
Sender: news@deep.rsoft.bc.ca (Usenet News at rsoft.bc.ca)
Lines: 29

> Willard MacDonald writes:
>
> Msg-ID: <20ned9INN48e@ymir.cs.umass.edu>
> Posted: 28 Jun 1993 18:48:09 GMT
>
> Org.  : Department of Computer Science, University of Massachusetts
>
> Keywords:motors
>
> Hi,
> Does anybody know of a supplier of motors capable of direct drive.
> i.e.  I want to drive a robot leg without a transmission between the motor
> and the leg to allow it to be backdrivable.
> Thanks
> Bill
>
>

The motors if electric all need some sort of speed reduction. Best to use a
gearhead that has no backlash such as those from HARMONIC Drive Technologies.
I think this company also sells the motor and the gearhead as a unit.
If you don't want to use a transmission you would have to use a hydraulic
motor. Lots of torque.


Hope that helps
cliff


