Hi,

Sometime, I surf on Ebay and see some very  nice servo motor but I don't know nothing about servo.

How could I find out to identify those that could work with cnc setup.

I would like to make some test with servo controller, maybe smooth stepper

I know as I read some earlier post that they should accept step and direction but that's all I know so far.

Can servo motor be identify by the number of wire they have?

What kind of encoder or resolver work best, best resolution...

Thanks for any input

Jeff

Have paste some links from ebay to show you some exemples.



http://cgi.ebay.ca/Oriental-Vexta-Gear-Head-w-AC-Servo-Motor-60W-3000RPM-/170580375088?pt=LH_DefaultDomain_0&hash=item27b761f630

http://cgi.ebay.ca/MCG-2281-ME3475-SERVO-MOTOR-4-00-LB-2-36-AMPS-/110220341455?pt=LH_DefaultDomain_0&hash=item19a9a4f0cf

http://cgi.ebay.ca/Fanuc-servo-motor-A06B-0522-B251-model-1-0-/150544127930?pt=LH_DefaultDomain_0&hash=item230d2117ba

http://cgi.ebay.ca/MCG-Servo-Motor-2232-MT3343-44591-001-/380300295914?pt=LH_DefaultDomain_0&hash=item588ba9feea

Hi,

You identify the steppers by taking the marking/type number from the motor and looking it up on the manufacturers website or googling it.

Smootstepper is not a servo controller, it is a motion control interface for mach3.
To control the servo you ned a servo driver like Granite Devices http://www.granitedevices.fi/
Their VSD-E driver has several modes of control including step and direction.