Sankyo Motor MSDA020L81 - Unipolar/Bipolar?

I have several old 5.25" floppy drives that I want to pull useful parts from. One part I pulled was a Sankyo MSDA020L81 motor (see image below). I know it has a rotation of 18 degrees and is a 12V motor. It has six pins.

From Connector
WHITE
RED
YELLOW
BLUE
BROWN
BROWN

From Circuit
WHITE
BROWN
RED

YELLOW
BROWN
BLUE

Does anyone know how to tell if this is a bipolar or unipolar motor?
Do you have any tips on how to run something like this?

Thanks in advance!


Picture of Sankyo Motor MSDA020L81 - Unipolar/Bipolar?
TwinDaddyD (author) 2 years ago

Thanks for the tips, iceng and rick! Now I've got ideas on what else I can salvage from the drives as well!

iceng2 years ago

See the circuit schematics.

These machines are run by energizing one coil then the other in sequence.

The speed of the sequence makes the speed of the shaft at 18' per step, sometimes you can energize both coils for half stepping but there are heat limitations.

You can buy drivers that can run these machines or DIY.

Stepper_motor_coil_configurations.jpg
rickharris2 years ago

rickharris2 years ago