Newsgroups: comp.robotics
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From: schuch@phx.mcd.mot.com (John Schuch)
Subject: Re: A [real] low-cost (<$5) gripper actuator
Message-ID: <1993Jun30.132013.4008@phx.mcd.mot.com>
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Organization: Motorola Computer Group, Tempe, Az.
References: <15117@blue.cis.pitt.edu> <m2ucr9INNqj1@appserv.Eng.Sun.COM>
Date: Wed, 30 Jun 1993 13:20:13 GMT
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In article <m2ucr9INNqj1@appserv.Eng.Sun.COM> cmcmanis@yikes.Eng.Sun.COM (Chuck McManis) writes:
>I don't know if its been published but I've been using something
>very similar for years. Basically to convert an inexpensive DC motor
>into a linear actuator you attach a threaded rod to it and movable
>sleeve. Now in the pencil case it simply moves the lead pusher back
>and forth, however by using a #4-40 rod with a inside a brass tube
>you can get arbitrary lengths. My setup looks like this:
>
> (one of the better ASCII drawings I've seen deleted)


I have been using the about the same thing with a couple of changes;

I use a stepper motor instead of DC motor, and I use SQUARE brass tubing
instead of round. The square tubing stops the rotation problem if the
business end is not connected to something.

John

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| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
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