Need Help!- stepper motor with 4 wires

[shauttra]

Hi!
I have a stepper motor 1.8 deg/step with 4 wires and 8 windings inside. Question is- what tipe of motor is it? Bipolar or unipolar motor?
Thanks!

[Bobbyr70]

bipolar motors only have 4 wires as far as I know.

[shauttra]

Ok, than it is bipolar motor, and i have a driver connected to the PC for bipolar motors, but motor does not work... Its make noise, but there is no movement...

[shauttra]

so, where is the problem? why motor does not work?

[chazmtu]

Hello,
I had the same problem with my unipolar motors in the past. Turned out they were wired incorrectly. Bipolar motors have two coils in them each with two wires. Try using a multimeter to test to see which wires go together. Resistance between two wires means their connected. Each wire should only have one other connected to it. hope that helps. Your board should tel you where each pair go.

Chuck

[Kelinginc]

4 wires motor is precofigured as bipolar mode. 8 wire motors can be wired as unipolar and Bipolar. see a example
http://www.kelinginc.net/SMotorstock.html
http://www.kelinginc.net/KL23H286-20-08B.pdf

[shauttra]

I had tryed all possible combinations of wire connection to driver, but motorr still dont move..
Driver have three incoming wires from batteries + - and 0, where i must connect 0 wire?
Thanks.

[chazmtu]

What kind of driver are you using(make and model)?

[shauttra]

There is poor info about controller.. It is bought on Ebay, type M106. There is something from description-
"For controlling a 4-lane bipolar stepper motor 3...17 V, max. 2 ampere. A double power pack (split power supply) is required for the current supply.Operating voltage: 4...18 V split power supply. Double DC voltage, dependent on the connected motor (always 1 V more than the motor requires). Motor connection: 1 bipolar stepper motor 4 connections 3...17 V max."
What means SPLIT POWER SUPPLY?

[chazmtu]

A split power supply is one that provides two voltages, such as plus and minus 5v. My guess is that the connector you were asking about with three connections(+,-,o) is as follows: "+" is for the positive voltage from your power supply(example +3...17v), "-" is for the negative supply(example -3...17v), and "o" is for ground. If your only using a one sided supply then thats probably the reason your motors don't run. You could probably build your own with a center tapped transformer and a few voltage regulators. Have any experience with a soldering iron? You could probably find a schematic online. Be careful tho, AC can be dangerous!!

[shauttra]

Thats sounds good!! Thats means the simple battery will not work? As i know, PC power supply have +5V and -5V output. I will try to do some experiments with this transformer.

[chazmtu]

You could test it out with two batteries, tho it would be a temporary solution.
connect two batteries in series + goes to positive, - to negative battery connection and ground goes to the connection between batteries.

(Negative Supply goes here) -Battery+ (Ground Here) -Battery+ (Positive Supply Goes Here)