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Driving a Hewlett- Packard Stepper Motor?

Greetings!

I am just getting my feet wet and have been doing a little research on stepper motors. 

I pulled two good- sized steppers from an HP printer a couple months ago, but I haven't been able to run them yet. 


I want to use an EasyDriver[https://www.sparkfun.com/products/retired/10267] to drive them, but due to the imposing ICs, I'm hesitant to just plug in the cables like a standard stepper. (I have identified one of the ICs(AN44050A) as a stepper controller)


Any recommendations on how to drive this puppy from a BeagleBone Black or other 3.3v logic controller?

~Tyler

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That's a stepper with an integrated driver. Best thing would be to trace out the incoming wires and drive the chip on board.

rene-vile1 year ago

it is a 3-phase brush-less dc motor with what looks like a sinusoidal driver... cant help you with the ic but i know the motor.

the three sop8 chips are propably rk4936 witch you can find tha datasheet on and pwm drive the motor.

motor voltage ic 24v

Brosing though the Archives eh? :P

i just fell over this in my search for that illusive an44050a chip, and since i know what the motor is i thought i would help the next person hunting the same answer... :)

Wired_Mist2 years ago

Yhea this looks like a brush-less motor. Thats Alot of circuitry for a Stepper driver. I Really Wish you had included a pic of the wires coming out and the pin-out; possibly what they were hooked into? Then you would be able to tell what it is.

If it is indeed a Stepper, Then Go with Steve up there !

Either way the board is Specifically designed to run the motor. No need to re-invent the wheel; Just use it :P

We'll all be be waiting for your Pic/Responce! Good luck :D

I dont think what you have there is a stepper motor, It looks more like a brushless dc motor. You maybe able to get it to run by hooking it up to a battery. Look near your leads on the PCB it may have some clues as to how to power it up. If there are no markings on the board, trace the tracks a to a capacitor. your looking for + and - . you might find that the red and black leads are the + and - . Hook those up to a 9 volt battery and experment with the other leads. You may find that earthing a lead or putting power to it will turn it on.