From: Crusty Curmudgeon
Subject: Re: How to determine the " common " of a Teac Motor taken out from a 5 1/4 disk drive??
X-Newsreader: Forte Agent 1.9/32.560
Date: Sun, 19 Jan 2003 08:53:57 -0600
NNTP-Posting-Date: Sun, 19 Jan 2003 08:52:32 CST
I have to ask... You did burn put the control program into the 89C2051, didn't
On Sun, 19 Jan 2003 18:18:24 +0800, "Laplace" wrote:
>I am working on this project
>Look at the extreme left side of the schematics.
>I paint leg 1 with "white correction fluid" and let it dry.
>leg 1 connect to red PIN of a digital meter and leg 2 give 75.5 ohm
>leg 1 connect to red PIN of a digital meter and leg 3 give 73.9 ohm
>leg 1 connect to red PIN of a digital meter and leg 4 give 74.2 ohm
>leg 1 connect to red PIN of a digital meter and leg 5 give 73.5 ohm
>leg 2 connect to red PIN of a digital meter and leg 3 give 147.2 ohm
>leg 2 connect to red PIN of a digital meter and leg 4 give 147.1 ohm +/-
>leg 3 connect to red PIN of a digital meter and leg 4 give 147.1 ohm +/-
>leg 4 connect to red PIN of a digital meter and leg 5 give 147.1 ohm +/-
>The components have already soldered. But "nothing moves" at all.
>I connected the max 232 according to this url
>Any help appreciated.
>Chuck Simmons wrote in message
>> Laplace wrote:
>> > 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
>> > ....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.
>> > Laplace.
>> 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 firstname.lastname@example.org
"Make peace an attitude. Want it. Make peace a habit. Live it. Make peace a reality. Share it." Mattie Stepanek, age 11,
speaking from his wheelchair to school children in Independence MO. Mattie, a published poet and television celebrity,
spoke at the annual peace assembly at Community of Christ headquarters, May 2002.