From: "John Jardine"
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 23:02:55 -0000
NNTP-Posting-Date: 19 Jan 2003 22:48:33 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Laplace wrote in message
> http://www.cfsl.mb.ca/cfsl/best_p/Anx_d5.html this is what I used, teac
> part no 14769070-90
> This is how a determine the "common" of a stepper motor for a Stepper
> 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
> 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,
> 4 .... leg 2 , the rotor will turn in "opposite direction" and move step
> If I am wrong, please correct me.
Your motor windings are correct. It is a standard 5 lead type. Your pin #1
needs connecting to the 5V supply.
It is easiest to check the motor 'phasing' if the wires are simply connected
onto the ULN2003 driver chip and the motor actually 'run'. Swap the wire
pairs if the motor just sits there and clicks and whirrs without moving.
So the pair of wires #2 and #3 go to the pins 15,16 and the pair of wires #4
and #5 goto the 14,13 pins.
Whichever way round the pairs are, there will be no damage.