"Paul Conners" wrote in message
...
180 vdc, 1 hp, pm motor.

with dmm what should be the first tests? motor is in a difficult location
to
examine visually so i'd like to start with electrical evaluation.

it measures 1.2 ohms between the 2 armature leads.

Motor out of the equipment. Turning armature slowly, the resistance
reading
between the armature leads varies from a low of 2.3 to high of 10; most
are
around 6-7 ohms. Resistance of each lead to motor frame is minimum 150K up
to
over 1 meg.

What's normal for such a motor?

Thanks.


Open it up and see if it has discolored windings. Does it smell burned? It
would seem to me that the resistance readings indicate compromised winding
insulation.