Sanyo Denki stepper motors
Type 103H448-0440

I originally received these motors as part of the Astromeccanica DA-1 LE kit, but after the DA-1 failed, I have later successfully modified them to suit a Boxdoerfer MTS-3SDI controller.

These pictures show the motors in the original configuration, where each motor case included a separate PCB and electronics. All of this was removed when adapting the Sanyo Denki stepper motors for the MTS-3SDI. Instead, the wires were soldered to a new DB9 connector as shown at the bottom of this page.

dec_motor0.html
dec_motor0.jpg
47.03 KB		 dec_motor1.html
dec_motor1.jpg
59.85 KB		 dec_motor2.html
dec_motor2.jpg
64.11 KB
dec_motor3.html
dec_motor3.jpg
68.09 KB		 dec_motor4.html
dec_motor4.jpg
48.16 KB		 ra_motor0.html
ra_motor0.jpg
46.56 KB
ra_motor1.html
ra_motor1.jpg
46.32 KB		 ra_motor2.html
ra_motor2.jpg
54.36 KB		 ra_motor3.html
ra_motor3.jpg
47.69 KB

The Sanyo Denki 103H448-0440 is a unipolar stepper motor with 6 Ohm winding resistance. I modified the motors as hown below, and it worked very well. If you use this information, please do it at your own risk.

Fitting Sanyo Denki stepper motors
for Boxdoerfer MTS-3SDI controller
DA-1 connection diagram
Sanyo Denki motor wire Solder to db9 pin number
(both motors)
red pin 1
yellow pin 2
orange pin 4
blue pin 5
white nc
black nc