Not quite a troglodyte, but......

Can someone point me in the direction of an information source for
data sheets (or similar) for what seems to be an obsolete custom
servo motor-tach? What I have is a pair of Electro-Craft PM SM-T
units that came on a very nice 400 lb custom made X-Y table with
ballscrews and about 18" travel in both directions. I would like to
be able to use the motors but have no CNC background, so kindly bear
with me when my unique terminology strays....
Particulars are: Electro-Craft Corp
Hopkins, MN
Permanent magnet Servo motor-Tach
Model 660-ENC (?1000?)
PN# (?1000?) 7-5552-1
Date code 131
The factory response was neither enlightening nor enthusiastic,
and the (?1000?) was spaced equally between the model and serial
designations but seems to belong to the serial number. The motors
were direct coupled to the ballscrews through a flex coupler, have
a .500 shaft, and an OAL of about 11". One had a bad experience that
knocked the end housing with PC boards and sensor off. If there is
no realistic use available to me they will be available to anyone
for cost of shipping.
Thanks, Brian