>I've just picked up a small, but solid Shinano Kenshi Co. 1.8 degree/step 75
>ohm stepper motor ($4US), for a camera platform and its leads are:
>1- brown
>2- black
>3- orange
>4- yellow
>5- red
>Any ideas on the proper connects?
>Vic
Vic,
I have this book,"The Robot Builders Bonanza - 99 Inexpensive
Robotics Projects", Gordon Mccomb, Tab Books, that explains stepper motors
and alot of different motor controlers including the SAA1027 chip. I figure
telescopes and camera platforms are robots of a sort.
I hooked up a 5 wire stepper motor to my dinosaur (XT)'s printer
port along with a power supply. I got it to step after I figured out the
wiring. The printer port pulsed four mosfets for each of the steps.
Here's how I did it:
For 5 wire 4-phase stepper locate the common by measuring
the resistance between each of the wires. 1 and 2, 2 and 3, 3 and 1 and
so on. There should be 10 combinations of two wires each. The common will
be the wire which, in combination with the rest, has the lowest resistance.
The other four are to each of the four windings.
I just played with the combinations of the four wires to the pulsing
circuit, until I got the motor to step smoothly. Otherwise it will sit there
and occilate when you don't have the right combination. I don't think that
it will hurt the motor.
I'm not an expert though. I am only relating my experience.
Good Luck,
Chris
cnebark@ix.netcom.com