[jaru-eri]

I bought a set with 6 wired stepper motors (nema 23) for a time ago. 2 of them are for + and - Do I need to connect all wires from these motors, or is it enough to connect only 4 of them to the drivers?

The scheme that followed with the set doesn´t tell anything about where to connect the + and - wires. Can these motors be run only by four wires?

[Mariss Freimanis]

It depends on whose drives you plan to use. If the drives are unipolar then all six wires must connect to the drive. If the drives are bipolar (dual full-bridge) then only 4 wires connect.

On a 6-wire motor you have 2 connection choices; full-winding and half-winding:

1) Full-winding. Connect the end-wires from each winding and ignore the center-taps. Insulate them from each other and everything else. Set the drive to exactly 1/2 of the motor's rated unipolar current; if the motor is 4A rated, set the drive to 2A. The performance is exactly the same as a series connected 8-wire motor.

2) Half-winding. Use the center-tap and one end-wire of each winding. It doesn't matter which end-wire. Ignore and insulate the unused end-wires. Don't let them touch each other or anything else. Set the drive to the motor's rated current; if the motor is 4A rated, set the drive to 4A. This connection is almost identical (within 1%) to the parallel connection on an 8-wire motor.

3) Both settings give the same low-speed torque (zero to several revolutions per second). The half-winding connection (2) will give twice the power at high speeds (twice the torque compared to full-winding at 5 revs / sec on up) but the motor will be much warmer.

Mariss

[jaru-eri]

Here are some of the schemes that followed the set. Maybe these will explain what kind of drives it is.

There are 6 slots on the output side on the drivers but the scheme tell me to conect the + and - of these to the power supply. Can I instead connect these to the steppers and do some different connections from the power supply, or can I maybe connect the + and - wires from the steppers directly to the power supply?

[jaru-eri]

Edit:
I missunderstood the black and white wires. They are not + and - but center wires. Sorry for that.