Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!att!cbnews!knt
From: knt@cbnews.ATT.COM (kirk.n.trost)
Newsgroups: sci.electronics
Subject: Stepper Motor
Message-ID: <7137@cbnews.ATT.COM>
Date: 5 Jun 89 12:53:08 GMT
Reply-To: knt@cbnews.ATT.COM (kirk.n.trost)
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 40


Does anyone know the basics for stepper motor operation.  I've got
a stepper motor with the following data sheet:


           ----------- SW1 -------
           |                      |
          ---------               |
          |       |--- SW2 -------|
     -----| motor |               |------O  +5v
     |    |       |--- SW3 -------|
     |    ---------               |
   __|__   |                      |
    ___    ----------- SW4 -------
     _


	Four-Step Input Sequence
	------------------------

	Step	SW1	SW2	SW3	SW4
	----	---	---	---	---

	1	on	off	on	off
	2	on	off	off	on
	3	off	on	off	on
	4	off	on	on	off
	1	on	off	on	off


What is the meaning of this 'four-step input sequence'?
The data sheet also has an 'eight-step input sequence'.
Is there an easy way to get the motor to step using a single
TTL pulse?  Why all the different wires?


Thanks,


Kirk ...