datasheet required! (motor+encoder)

[kumar_prashu]

hello everybudy
I have got a used motor with encoder , which it looks, have been drawn from CNC type machine. The rating plate (on the motor) only tells about rated voltage. and other things are missing.what soever it had mentioned, i m giving below

On the motor:

Canon precision japan
FH-7-1756
CN-38-12301
Type- BB 2.6.N0.1
DC-12V, 3.3W

On the Encoder:

Shinko Electric Co. Ltd.
customer No. FH7-5159

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A similar other motor reads:
FH-7-1758
pXN- 15EE23F
18893BC

I am new to servo motors and dont know how to make sure about the rpm of the motor and other useful things rerquired to make it run.
the encoder resembles like a disc with slits into it. so i assume that they are optical sensors.

If someone can tell me about how to run these particular motor then thanks to him. Also if u could refer me datasheet or any other similar type of device, from which i can conclude.

Thank you once again.