Newsgroups: comp.robotics
Path: brunix!uunet!news.cnri.reston.va.us!newsserver.jvnc.net!howland.reston.ans.net!gatech!swrinde!sdd.hp.com!hp-cv!hp-pcd!hpcvca!hpcvcec.cv.hp.com!abrown
From: abrown@hpcvcec.cv.hp.com (Allen Brown)
Subject: Re: Micro Motor Hints
Message-ID: <1993Jul14.235754.16214@hpcvca.cv.hp.com>
Sender: nobody@hpcvca.cv.hp.com
Nntp-Posting-Host: hpcvcec.cv.hp.com
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
References: <2211viINN8si@uwm.edu>
Date: Wed, 14 Jul 1993 23:57:54 GMT
Lines: 26

> 	PRESS-FIT AXEL ATTACHMENTS:
> Most small electric motors aren't built for abuse such as pounding
> pulleys onto the axel, or prying gears off the axel with a
> screwdriver.  DON'T push or pull a pulley/wheel/gear onto or off of
> an axel without first bracing the axel against the force.
> RICK MILLER                <rick@ee.uwm.edu>

I recently faced this problem with a larger motor.  The solution my
neighbor came up with was to hold a C wrench in the vice.  Then place
the motor shaft in the middle of the C with the motor on one face of
the wrench and the gear on the other.  We then tapped on the axel with
a drive pin.  The nice thing about this solution is that the motor had
no force on it other than vibration.

With a small motor you would not be able to find a wrench small enough
to do this.  But in that case you could simply hacksaw a slot into a
thin steel plate.  And you could probably use a small nail or brad
instead of the drive pin.

Warning: this solution requires three hands.  One to hold the hammer.
One on the drive pin.  And one to hold the motor to keep it from
falling when the gear comes off.
--
  Allen C. Brown  abrown@cv.hp.com or hplabs!hpcvca!abrown or "Hey you!"
      Not representing my employer.
    REAL fortran programmers can program fortran in any language.
