Help needed with Stepper Motors

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Article #5789

#5789

From: Nathan G. Parker
Date: Fri, 24 Aug 1990 06:23

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  I just received a broken Rodime 20+ hard disk.  I opened it up and
took out the two stepper motors, thinking that they would be useful for
something, but I don't know how to use them.

  The larger motor (used to turn the disk) has no model number on it.
It has 5 wires coming out of it and feels like it has 4 positions (90
degrees).

  The smaller motor (used to move the head) says "Sinano Electric
4H4009S-0412  66A".  It has only 4 wires and feels like it has about
360 positions (about 1 degree).

   Can someone tell me how I could get these motors to do something
useful?  I'd like to be able to give one of these motors a certain
number of "clicks" and have it turn that number, in whichever direction
I choose.  Is this difficult?

   Please reply by mail.  Thanks.

      -- Nathan Parker
	<ngparker@george.lbl.gov>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!wuarchive!usc!ucsd!dog.ee.lbl.gov!usenet
From: ngparker@george.lbl.gov (Nathan G. Parker)
Newsgroups: sci.electronics
Subject: Help needed with Stepper Motors
Message-ID: <6630@dog.ee.lbl.gov>
Date: 24 Aug 90 06:23:31 GMT
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Organization: Lawrence Berkeley Laboratories
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X-Local-Date: Thu, 23 Aug 90 23:23:32 PDT