Newsgroups: comp.robotics
Path: brunix!news.Brown.EDU!agate!howland.reston.ans.net!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!ncar!uchinews!cdsmail!timbuk.cray.com!hemlock.cray.com!kilian
From: kilian@cray.com (Alan Kilian)
Subject: Re: Mitzibushi(sp?) stepper ... HELP
Message-ID: <1994Feb25.092433.11468@hemlock.cray.com>
Lines: 31
Nntp-Posting-Host: palm
Organization: Cray Research, Inc.
Date: 25 Feb 94 09:24:33 CST

You probably have a two coil stepper which is also called a bipolar stepper.
If you had something like 5 wires I would guess a four coil unipolar stepper.

Could you use an Ohm meter an tell us what the resistance is between the wires?

If you get a resistance like 30 to 100 Ohms between White and Red
and another 30 to 100 Ohms between Blue and Green then you do have a
two coil bipolar stepper and you can step it like this:


Phase	White	Red	Blue	Green
0	+	-
1			+	-
2	-	+
3			-	+

Where + and - is the positive and negative side of the 12 Volt battery.

The motor will go around with only 6 volts if you want to be extra careful.

You need to try different combinations of the sequence 0,1,2,3
or 0,3,1,2 etc to figure out which one makes the motor go around properly.

If you get different Ohm readings, let us know.

                 -Alan

-- 
 -Alan Kilian           kilian@cray.com 612.683.5499 (Work) 612.721.3990 (Home)
 "Seeing is much more than the perception of images. 
  It is the application of knowledge" Some Visual Agnosia expert on NOVA
