Connecting the Oriental Motor Vexta PH265L-04 Stepper Motor

This Vexta motor is a discontinued NEMA23 unipolar stepper motor with a single shaft. Information is sketchy, but better than the Step-Syn 103-771-16; here are my best guesses at the specifications:

	Value	Unit
Degrees Per Step	1.8	Degree
Rated Voltage	5	VDC
Rated Current	1.0	A
Holding Torque	58.3	oz-in
Coil Resistance	5	Ohm
Inductance Per Phase	1.3?(hard to read)	mH
Rotor Inertia	0.6	oz-in2

Sources:

• Oriental Motor PH Series Installation Guide - shows wiring.
• JPEG of PH265-xx Datasheet - Data for PH265-04; I assume the PH265L-04 is similar. (via this CNCZone thread)

Wire Colors:

• Coil 1: GREEN/BLACK with YELLOW center tap
• Coil 2: BLUE/RED with WHITE center tap

Bipolar Mode using Copley Stepnet STP-075-07

Vexta Wire Color	Stepnet Connector	Stepnet Pin	Stepnet Signal
Not Connected	J2	1	Frame Ground
RED	J2	2	B-
BLUE	J2	3	B+
BLACK	J2	4	A-
GREEN	J2	5	A+
WHITE, YELLOW			Not Connected

CME2 has a dialog where you should enter the specifications for the stepper motor. I do not have guaranteed numbers for all the fields; I recommend using the specifications above as a start, and guess at some reasonable values (based on similar stepper motors) for the remaining values.

Unipolar Mode using Allegro Microsystems UCN5804

Drive Sequence (to turn Clockwise when facing the front of the motor):

• 2-Phase Drive: RED/GREEN, GREEN/BLUE, BLUE/BLACK, BLACK/RED

Sample connections to a Allegro Microsystems UCN5804 Unipolar Stepper Driver:
(Note: driver setup for 2 phase drive, turn clockwise when facing front of motor)

Pin	Signal	Connected To
1	Output B	Vexta BLUE wire
2	K BD	+24VDC
3	Output D	Vexta RED wire
4	Ground	Ground
5	Ground	Ground
6	Output C	Vexta BLACK wire
7	K AC	+24VDC
8	Output A	Vexta GREEN wire
9	One Phase	Ground
10	Half Step	Ground
11	Step Input	TTL Step Input Signal
12	Ground	Ground
13	Ground	Ground
14	Direction	Ground
15	Output Enable Low	Ground
16	Vdd	+5V
+24VDC		Vexta WHITE and YELLOW wires