Steppers out of Comodore 1525 printer?

[Cgann]

Hey all, been combing google looking for answers and found myself here. I've got a handful of stepper motors out of old Comodore printers and can't find any specs on them. I'm looking to use them in a desktop CNC but don't know if they're up to the task.

All the info I have is some nubmbers on the back of them. Does anyone have any info on these?
84300-1015
84320-1014
42SI-22DAG
42SI-22DAWA

TIA!
CG

[RomanLini]

Please post photos, people may be able to get an idea of the specs and torque etc based on seeing the motor type.

[Cgann]

Thanks for the guidance. Also, I stand corrected. It was a Commodore 1526 printer, not 1525. In case that makes a difference to anyone.

Photos of steppers to follow.

[Cgann]

I've uploaded photos of the following motors:
84300-1015
84320-1014
42SI-22DAG
42SI-22DAWA
If anyone can help by providing specs, torque, etc. please let me know.

Much appreciated!

[RomanLini]

Thanks for the photos. The frame size is Size17, they are "pancake" style (usually 7.5 degree per step ie 48 steps/rev) and the date codes are 1983 and 1984 so they are old magnet technology and will have quite low torques.

The last 2 photos show 7.5' markings and 50 ohms. They are unipolar motors and need unipolar drivers. That size pancake motor is normally rated for about 1.8W per phase so at 50 ohms that would mean a unipolar drive of 9.5v and 190mA.

At rated 9.5v and 190mA these small motors will have a very low torque, maybe 15 to 20 oz-in of torque.

As they are very low torque and only 48 steps/rev they are not great for CNC use except maybe for a very small lightweight machine like a tiny PCB engraver. Even in that case you will need fine threaded rod as leadscrews.

I know it's not what you wanted to hear but that about sums it up.

[Cgann]

I had a feeling this would be the case. No worries. But thank you so much for the information! It's very much appreciated.

Cheers!

CG