I have a stepper motor ( Model = 23KM-K381-01V , NO.T6Z23-07 , DWG NO.56AA80112).
Motor Specifications:
Motor is unipolar , 6Wires , 2A current , 1.8 deg step angle.. Motor is second hand. I do not have datasheet of the motor. and the worst thing is no wire is connected to the motor. so I can not take benefit of color coding.
So my question is how do I know that which wire of the motor should be connected to A+ , A- , B+ , B- of the stepper motor driver...
Thanks in advance for the help.
You can identify the four windings by measuring resistance. Resistance of L1-to-centre-tap will equal resistance of L2-to-centre-tap. (And resistance of L3-to-centre-tap will equal resistance of L4-to-centre tap). All terminals of L1/L2 have infinite resistance to all terminals of L3/L4.
Six-wire stepper test circuit can go like this. Use a low-voltage DC source that doesn't heat the motor coils when one of the four switches are closed.:
simulate this circuit – Schematic created using CircuitLab
A typical 4-step sequence might be:
There are other step-sequence possibilities than this one. At each step, check which way the stepper rotates. You should be able to arrange the coils so that the sequence steps always clockwise.
Six wires are, almost certainly, two sets of three. Each set of three is respectively connected to a coil, and call them: minus, plus, and center-tap. The DC resistance between any two wires from the same set of three should be very small. The resistance between two of the wires will be double that of any other two in the set of three, so you can use that to identify the center tap. Ground both center taps. There are four ways the polarity of the remaining pairs could be, but only one of them will make sense with your stepping sequence. Brute force the possibilities.
