Servo Motor Identification

I have just gone from having no servo motors to having 8! My problem is
that I cannot find out the electrical characteristics of any of them.

The first two came from a Calcomp plotter, the type with a 3 foot or so pen
movement, possibly a 4XXX. The motors are labelled:

Universal Magnetics Corp.
Subsidiary of IMC Magnetics corp.
10211-301-001
ME21026017
8709
Cerritos. CA 90701.
There is no reference to voltage or current, apart from a plus sign next to
one of the brushes. There is an encoder on the end. I do not have the
controller. They are about 2 inches in diameter and about 4 inches long,
excluding the encoder.



The next 6 are from a Unimate Puma 500 series robot. There are two
different sizes, NEMA 23 and 34.

The base motors, NEMA 34, are about 4 and 3/8 long excluding the encoder and
potentiometer. They also contain a brake. Total length is 6.5 inches.

There are no labels on the motors. Hand written on the flange mounting
plate is:

ST = 14.0 (possibly lb ins)
SC = 7.1 AMP
BT = 1.8

No mention of voltage.

The wrist motors, NEMA 23, are about 1.75 inches long, excluding the encoder
and potentiometer. There is a label saying Unimation (Europe) Ltd, dated
March 1983. There re no other markings.

From the little I have been able to find on the PUMA motors I believe the
NEMA 34 motors are rated at 8 amps and the NEMA 23 motors at 4 amps.

If the SC = 7.1 Amps written on the NEMA 34 motors means stall current,
could I lock the armature and measure the voltage to get to 7.1 Amps, or
would this destroy the motor?


Can anyone help me with any information on these motors? I do not want to
destroy them!

Thanks

B

Brian H Le Page