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Author Topic: stepper motor finding home position  (Read 668 times)
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I have a stepper motor application where I need the motor to be able to rotate 360+ degrees, but I also need to know the precise position at any given time.  I could use an absolute encorder, but that seems overkill.  I just want a simple solution where I can easily find the home position and use it as reference when I turn the power on.  I'm thinking maybe an optical encoder that only has one slot?  I can't seem to find anything like that, but I would image they exist somewhere.  Or is there some better solution?  Any help would be appreciated.

thanks,
-Nathan
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Massachusetts, USA
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Common solutions are:

An optical sensor with a single hole/slot or tab to sense.
A physical switch with a notch or tab to sense.
A hall-effect switch with a magnet to sense.

Once you seek to the 'home' position you just have to keep track of steps to know where you are.
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Yes, that i what I want.  Where do I buy one?
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Yes, that i what I want.  Where do I buy one?

Here's one:

http://www.plccenter.com/Shop/VISHAY/TCST1230/FNFP
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That's just a sensor. I need something to sense.  Like a disc with a signal slot or something like that.
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A cardboard disc? Or a plastic one made from a milk-bottle top?

...R
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A switch you can get from radio shack.

http://www.radioshack.com/product/index.jsp?productId=2049719
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