Bridgeport Series I stepper wiring

For those that may be interested:

I just received a call from Al Goshi at Ahha and he tells me that:

For the Sigma motors:
(identified by 8 terminals in pairs with a plastic partition
between the terminals of each pair)

Connect the phase windings in parallel and set the controller to 10
amps
terminals 6 & 3 connected to phase A+
1 & 5 connected to phase A-
4 & 8 connected to phase B+
2 & 7 connected to phase B-

For the Superior motors:
(identified by 8 terminals in a round pattern with no plastic
partitions)

Connect the phase windings in parallel and set the controller to 10
amps
terminals 6 & 3 connected to phase A+
2 & 1 connected to phase A-
4 & 7 connected to phase B+
5 & 8 connected to phase B-

He also suggested 1/8 stepping and increasing or decreasing the drive
current if the motors seem rough or 'noisy'.

Cheers,

Chuck Hackett
Omaha, Nebraska, USA
7.5" gauge UP Northern 844