Author Topic: stepper motor help...  (Read 2123 times)

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Offline SmAsHTopic starter

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stepper motor help...
« on: January 24, 2008, 02:03:21 AM »
ok i have a stepper motor but it has four cords??? can someone please tell me what these are for and how to hook it up properly. ;)


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Offline Ro-Bot-X

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Re: stepper motor help...
« Reply #1 on: January 24, 2008, 02:25:55 AM »
It is a Bipolar Stepper motor.

A stepper motor has 2 coils. The Unipolar stepper's coils are split in half and the middle wire goes to ground. On some steppers the middle wires are separate (6 wires) and on others they are connected inside the stepper (5 wires). Voltage goes only in one direction through the half coils.

In the Bipolar stepper, the coils are not split and the voltage goes both ways through the coils. You will need a H-bridge to drive the coils properly, one H-brdidge for each coil (think as 2 DC motors in one). L293D or L298 dual H-bridge will work with this type of steppers (one for each stepper).

The bipolar stepper has a better power/weight ratio (less wire on the coils).
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Offline SmAsHTopic starter

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Re: stepper motor help...
« Reply #2 on: January 24, 2008, 02:31:01 AM »
oh...ok
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Re: stepper motor help...
« Reply #3 on: January 24, 2008, 08:33:30 PM »
There are also stepper motor drivers you can buy.

Offline SmAsHTopic starter

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Re: stepper motor help...
« Reply #4 on: January 24, 2008, 08:39:15 PM »
yea i know that but does anybody know which are neg - and which are pos +?
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Re: stepper motor help...
« Reply #5 on: January 24, 2008, 08:45:42 PM »
Quote
yea i know that but does anybody know which are neg - and which are pos +?
Its really easy to guess. Just randomly hook up the wires to a battery and see what happens. If you google it up, you can learn about patterns for controlling stepper motors.

Offline SmAsHTopic starter

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Re: stepper motor help...
« Reply #6 on: January 24, 2008, 08:52:16 PM »
lol ok ill look
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