Mimaki JV3 pump motors and the wires

to supply power to the motor that operates the mechanism/pump?

 

stepper motors

As an electronics person who works with steppers every day you are exactly correct!

You will find each pair of wires have conductivity in the are of a few ohms to a few tens of ohms (motor dependent) if the motor is good. Think of the motor as being made of two independent coils of wires; the four wire motor is the simplest and easy to check using an ohmmeter/resistance meter.

Each coil (motor winding) is powered independently by the stepper motor controller chip on the circuit board.The timing and sequence of the power pulse in each coil govern the rotation of the motor.

If the two coils ohm out fine then motor is 99 percent good. They are quite reliable, esp in this appication where timing is not a big issue, the pump mechanism simply need to go round and round..

Hope that helps.