Path: 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 Sender: usenet@dog.ee.lbl.gov Organization: Lawrence Berkeley Laboratories Lines: 22 X-Local-Date: Thu, 23 Aug 90 23:23:32 PDT 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