From: Dennis Clark
Subject: Re: Help please: Stepper wiring info needed
User-Agent: tin/1.5.9-20010723 ("Chord of Souls") (UNIX) (FreeBSD/4.6-STABLE (i386))
Date: 03 Nov 2002 02:12:18 GMT
In comp.robotics.misc JB wrote:
Since its from an "old" stepper, data will be scarce. Berger-Lahr is on
the web, use Google. They seem to like three-phase steppers, so it might
be a three-phase stepper. Usually old floppy drives used bipolar steppers.
Any dual H-bridge will control the two windings needed in that case. If
its a three-phase stepper (pretty unusual I think) then life will be a little
harder, but not too bad - You'll just have to knuckle out the stepping
sequence. Use an DVM to check. If you find two distinct coils, you have
a bipolar stepper. Since its an old 5 1/4" drive, you know its a 12V stepper.
Considering the source also, you can bet its less than 500ma per winding
too - They were generally low power.
I'll use another chance to advertise my book, "Building Robot Drive Trains"
that details how to decode and use stepper motors (Chapter 5). ;-)
* Dennis Clark firstname.lastname@example.org www.techtoystoday.com *
* "Building Robot Drive Trains" published by McGraw-Hill 2002 *
: I have a stepper from an old 5 1/4" floppy which I'm trying to find specs
: It's a Berger-Lahr 540056-002, 4-wire device.
: I need the voltage and current rating for this beast.
: thanks in advance,