Ricky ZhangDisclaimer:
I have zero experiences in stepper motor before. So I need to figure out how stepper motor works. The following is a log on my learning process of stepper motor.
Learning Process:
There are 3 types of stepper: unipolar, bipolar and hybrid stepper motor. We need to figure out what type of stepper motor and also its wiring.
I got an unknown source of stepper motor with model TEC CLA45-14601 on the label. There are six wires on it. Based on the number of wires and according to the Internet, this can be a unipolar or a hybrid.
Because I can't google its data sheet. I have to use digital meter to check the resistance of each pin combination. This youtube video is very helpful to grasp the idea how to identify coil and tap.
| Wire | Resistance | Note |
| Red | Red-Yellow: not connected Red-Brown: 20 Ohm Red-Blue: not connected Red-White: 11 Ohm Red-Black: not connected | RED, Brown, White is in the same coil Yellow, Blue, Black is in the same coil |
| Yellow | Yellow-Brown: not connected Yellow-Blue: 20 Ohm Yellow-White: not connected Yellow-Black: 11 Ohm | Black is tap |
| Brown | Brown-Blue: not connected Brown-White: 11 ohm Brown-Black: not connected | White is tap |
| Blue | Blue-White: not connected Blue-Black: 11 ohm | |
| White | White-Black: not connected | |
| Black |
Rule of thumb
- If not connected, they are not in the same winding
- For the same winding, the resistance between coil end and tap is the half of the resistance between two coil.
Based on such rule we can deduce which two are tap and which are belong to the same winding. See the notes above.
To be continue...
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