Haydon stepper motors

pilot00

Howdy,

I have a stepper motor that I picked up and it says the following:

Haydon Switch and Instruments, Inc.
35402 5vdc 2.5w 15deg. rev.
Stepper Motor
Other markings on one side 8432 lot number??
Four wires: Blue,Green, Red, Black

I cannot find a data sheet on this stepper. Haydon representatives say that they
no longer have any information. Google search does not produce anything.

Anybody have a data sheet, wire diagram or any information??

Thanks.

Leon

You should be able to work out the connections with a DVM, by measuring the resistances between the wires. The resistances will give you some idea of the voltage requirement, also. I've done that before now, with a stepper motor for which I didn't have any data.

Leon

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James Long

Leon,

The label evidently already tells that. With the voltage and wattage, we can figure the amperage, but we can not figure the holding or moving torque.

5 vdc at 2.5 watts:

The windings should be about 10 ohms each.

Which would require 1/2 amp per winding, so by their label (which may not be accurate) you will need at least 2 amps to drive the stepper. I find your better off doubling that amount. You do not want the stepper to pull your voltage down and sink your power supply.

I searched and the stepper is probably a 4 wire bipolar stepper motor. They work a little different than a unipolar.

Bipolars have two coils which pulse from positive to negative, like below:

www.sscnet.ucla.edu/geog/gessler/topics/steppers.htm

Check it out, this will help explain how it works.

that url didn't help much, but the next one will

www.tigoe.net/pcomp/code/category/code/arduinowiring/51

James L

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James L
Partner/Designer

Lil Brother SMT Assembly Services

Post Edited (James Long) : 4/26/2009 7:39:50 PM GMT