8 Wires Steppers?

[kolias]

ok, my CNC router machine is done and all the wiring is done and power to the 3 drivers and breakout board is ok at 28.5VDC. Now I’m setting the MACH3 and get no motors movement

I suspect the problem is with the motors wiring. My stepper motors are 270oz in, 8 wires and wired as unipolar at 3.0A. Besides the 4 wires which are connected to A+, A-, B+, B-, the other 4 wires are connected to 1 wire and this 1 wire is connected to the common on the driver board.

Does this motor wiring sound ok ?

[cmnewcomer]

The attached PDF may help. About half way down, it discusses wiring for the 8 wire stepper in either parallel or series.

Best Regards.

Carl

[ger21]

Do the motors lock up when power is applied? If they do, then they are probably wired correctly. Are you sure you have the correct port address, and all the pins set correctly? Do the DRO's in Mach3 change when you try to move?

[bemfarmer]

Originally Posted by kolias ok, my CNC router machine is done and all the wiring is done and power to the 3 drivers and breakout board is ok at 28.5VDC. Now I’m setting the MACH3 and get no motors movement I suspect the problem is with the motors wiring. My stepper motors are 270oz in, 8 wires and wired as unipolar at 3.0A. Besides the 4 wires which are connected to A+, A-, B+, B-, the other 4 wires are connected to 1 wire and this 1 wire is connected to the common on the driver board. Does this motor wiring sound ok ?

Very sparse information here. The 4 common wires would connect together to the appropriate unipolar driver board pin, per its documentation.
Believe the gecko's are NOT unipolar drivers.
Make sure in ports and pins that DIR and Step pins are correct per your documentation, as some boards have them numbered opposite from the Mach3 video setup.

[kolias]

Originally Posted by cmnewcomer The attached PDF may help. About half way down, it discusses wiring for the 8 wire stepper in either parallel or series. Best Regards. Carl

Hi Carl

That is an excellent document and I thank you

Unfortunantly it does not address my problem; it refers to Bipolar stepper wiring only and my motors are Unipolar.

I thank you again for this excellent document.

[kolias]

Originally Posted by ger21 Do the motors lock up when power is applied? If they do, then they are probably wired correctly. Are you sure you have the correct port address, and all the pins set correctly? Do the DRO's in Mach3 change when you try to move?

When I first turn the power ON, I hear a "thumb" at the motors and that's it. The port address is the correct one according to the device mgr. The pins are correct. The DRO's do not change when I try to jog the motors

Thank you

[ger21]

If the DRO's do not change, then you have a problem with mach3. If the DRO's are not changing, then no movement is being sent out.

Check if the motors are locked when power is on. Can you turn them?

[kolias]

Originally Posted by ger21 If the DRO's do not change, then you have a problem with mach3. If the DRO's are not changing, then no movement is being sent out. Check if the motors are locked when power is on. Can you turn them?

Very sorry, the DRO's DO change when I try to jog the motors

[kolias]

Got my problem solved

It was the printer cable which did not have all pins wired thru. Went to the store and exchange it for another one and all is working fine now.