From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: How to determine the " common " of a Teac Motor taken out from a 5
1/4 disk drive??
Date: Sun, 19 Jan 2003 06:31:34 GMT
NNTP-Posting-Date: Sat, 18 Jan 2003 22:31:34 PST
> http://www.cfsl.mb.ca/cfsl/best_p/Anx_d5.html this is what I used, teac with
> part no 14769070-90
> This is how a determine the "common" of a stepper motor for a Stepper motor
> project. The board is built but the stepper motor does not move at all.
> There may be a lot of problem. I need to track down unknown/known "things"
> one by one.
> My method of find the common of the stepper motor is tested by in the
> following way.
> leg 1
> leg 2
> leg 3
> leg 4
> leg 5
> step 1 . if I apply 5 Volt +ve wire connects leg 1, -ve wire go to leg 2,
> ....leg 5 , the rotor will turn in one direction and move step by step.
> step 2 if I apply 5 volt +ve wire connects leg 1, -ve wire go to leg 5, leg
> 4 .... leg 2 , the rotor will turn in "opposite direction" and move step by
> If I am wrong, please correct me.
First, what do you mean by common for a stepper?
Second, measure and record the resistances from each wire to the others.
This will tell you how the motor is wired in most cases.
Third, I have not yet seen a stepper with a common except for the
Superior Electric Slosyn synchronous motors. All others I have seen are
4 wire or 6 wire with no "common." (An exception is the Berger-Lahr five
phase motors but you don't have one of those.)
Caveat. Brushless DC motors are properly classed as stepper motors since
they are magnetically identical to steppers. However, it is unusual to
refer to a brushless DC motor as a stepper. Moreover, my comments refer
to permanent magnet steppers which seem to be the most common type.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons email@example.com