Need help to identify a couple of motors

[-jon-]

I managed to get hold of a few old printers and faxes yesterday and spent the evening extracting the motors. There are a couple that I like the "look" of but am not sure of their voltage requirements.
If anyone could help it would be appreciated.

Motor 1
Came from a Minoltafax2600
Markings - KH42 JM2 B040 1.8 deg No 8904 Japan Servo Co
4 wire

Motor 1
17PU H018 G2T T8X28 MINEBEA co
4 wire

I can put photos up later today if required

Also, does anyone know the conversion from oz/in to Kg/cm

Thanks in advance

Jon

[-jon-]

I also managed to find a couple of others.

Minebea Mini Angle steppers
23LM-K232-01
24V 0.2A 1.8 Degree
6 wire

Would these be suitable for a light duty X and Y axis, or should I look for something a bit more heavy duty?

Jon

[jeffs555]

Most of those motors are only around 10 or 20 oz-in, so not much use except for an extremely small and light machine. Also, you generally want motors less than 5 volts to get any kind of speed.

Here is an online converter which will go from oz-in to kg-cm.
http://www.linengineering.com/flash/Calculator.swf

[-jon-]

Thanks for the advice. Ill put those ones in a box till I find another use for them.

Would something like these be more suitable?

http://www.oceancontrols.com.au/moto...th_23HD601.PDF

Regards Jon

[jeffs555]

That one has much better static torque, but it might be a little slow. That is a relatively high voltage, high inductance motor. For best speed, you want a motor rated well under 5 volts. To get good speed, you want a chopper drive with a power supply 10 to 20 times the rated voltage of the motor. Ten times 7.2 volts is 72 volts, which is way too high for the cheaper drives, and getting close to the limit for the better drives.

[-jon-]

Cheers Jeff.

I have decided not to go with these ones either, as I read a post somewhere that saaid that altho they had good holding torque, whilst turning, you could stop them with very little force.
Looking at some 125oz, 3.6v 2A ones now which look a little better.

So to clarify, if I choose these motors, I should use a chopper board and have the motor supply voltage at 36v (providing the driver board will handle that).

Jon