by

|   September  5, 2009 at 2:12 PM

What kind of battery do I need for this?

by

|   October  7, 2009 at 0:56 AM

Batteries won't last long with a motor like this. You better use a power supply.

I tried to make it work with a little higher current, and I could feel the magnets move inside. Unfortunately, the head doesn't spin...
Any clues about what's happening here?

by

|   October  7, 2009 at 7:49 AM

What stepper driver chip/circuit are you using? This motor works quite nice with the EasyDriver (also sold by SparkFun). But you can't just put current into this motor - since it's a stepper motor, you need a stepper driver circuit that will sequence the two phases correctly.

by

|   October  8, 2009 at 1:28 PM

Thank you for the answer.
Of course I'm not just putting current into the motor.
I use a Unipolar Stepper controller from Phidgets (http://www.phidgets.com/products.php?category=13&product_id=1062) because I use it with max/msp and they objects for all their devices...
Again, I hear the magnets activate, but the head doesn't spin! I must be doing something right since I feel/hear the motor working. But something is wrong!
Also, I can't find a power supply with the right current/voltage combination!
Any help would be appreciated... thanks!

by

|   October 27, 2009 at 2:26 PM

This is a bi-polar stepper motor (all 4-wire stepper motors are bi-polar) and so you will not be able to use a uni-polar driver with it.

The product description should be updated with this information.

by

|   October  8, 2009 at 1:32 PM

Or could it be that this stepper is bi-polar and my controller unipolar?

by

|   October  9, 2009 at 3:53 PM

Is this NEMA 23? (Compatible with this tutorial:
http://reprap.org/bin/view/Main/McWire_Cartesian_Bot_1_2 )

by

|   October 27, 2009 at 10:30 AM

it looks like from yourtube videos I've seen that this motor used to come with a much longer shaft. Any word on whether this has changed with this batch of motors, or could the data sheet be off.

by

|   December  5, 2009 at 4:13 PM

just for people who buy this ive made a post on my blog for creating a surveilance system using the motor http://garagedeveloper.wordpress.com/2009/12/05/the-diy-surveillance-system-using-a-webcam-part-1/ . all is open source with code so :) thanks spark fun

by

|   December  7, 2009 at 2:14 PM

This is a 200 step motor? What is the % margin of error per step? For example, with 5% MoE I can expect 1/8 step accuracy. With 10% MoE I can only use 1/4 steps reliably.

by

|   December  7, 2009 at 2:47 PM

Found in the datasheet: 1.8 degrees +/- 5%

by

|   December 18, 2009 at 10:08 AM

Great motor. Any source for similar motors but smaller?
Thanks

by

|   January  4, 2010 at 1:23 PM

Seems to be a nema 17 (31mm)

by

|   January 15, 2010 at 12:53 AM

If you go by measurements on the picture here, motor body face size is about 26 mm square, yet datasheet with link above specifies 43 mm. Which motor exactly are you selling?

by

|   January 16, 2010 at 0:20 AM

I have this motor and the EasyDriver V4.2. I have looked at many different posts and it would appear that I have everything hooked up correctly. When I send pulses to the motor to drive it, the motor just vibrates. It may be a similar issue to that posted by Lyouss on Oct. 8th 2009. Another symptom is that when I do single steps, there are times when my power supply is drawing the entire amount of current (aprox. 0.6 amps) and there are times when the current drops to about 0.3 amps and the motor loses it's holding torque. Any help would be much appreciated.

by

|   January 22, 2010 at 9:04 AM

John, contact me at brian_schmalz (at) yahoo (dot) com and I can help you try and figure out what's going on with your setup.

by

|   January 22, 2010 at 7:01 AM

Does anyone know how to use this with Ladyada's motorshield?

by

|   January 29, 2010 at 3:09 PM

Does anyone know where I can find a pull-out curve for this motor? I need to know the torque vs. speed characteristics.