Can not get stepper motors to move with Gecko g250x drivers

No, as I tried to convey I am literally changing 3 wires to switch between the 7i96s and Arduino, let me switch and send a couple of pictures.

Testing from 7i96s





Testing from the Arduino 

 

 

 

I could not upload videos but motor not spinning driven from 7i96s and does spin driven by Arduino. 
 

If possible I am more confused. I was trying to measure voltages while the Arduino was driving. The motor only turns in a CW direction, when CCW is requested it does not turn.

Also, because the signal ground comes from the Arduino the stepper is turning very slowly, but if I try measuring voltage from signal ground to any phase the motor speeds up, am I shorting something trying this?

It seem like a GNDing issue of some kind
Is it possible the G250X power ground is somehow
only making connection via the signal GND?
 

The G250x is a bit of a strange beast, IMHO. To get support for 4.0 Amps there are 4-pins per signal, each supporting 1.0 Amps. Pins 0-3 are power ground, 4-7 power positive, … pin 27 direction, pin 28 step, and pin 30 signal ground.

I have 1 ground wire which splits into 4 wires to each pin 0-3, the main wire comes from ground common in my enclosure, by common ground I mean I have a grounding terminal block that has both power supplies negatives connected.

Pins 4-7 have a similar split cable connecting to 48v positive

Pins 8-11 split cable to pin 1 of aviation connector. Phase A+

Pins 12-15 slit cable to pin 3 of aviation connector. Phase A-

Pins 16-19 split cable to pin 2 of aviation connector. Phase B+

Pins 20-23 split cable to pin 4 of aviation connector. Phase B-

Pin 25 current limiting resistor, to signal ground pin 30

Pin 26 not connected

Pin 27 DIR

Pin 28 STEP

Pin 29 not connected

Pin 30 signal ground

I think your pin numbering of the power is off-by-one
GND 1..4
+PWR 5..8

I would think that the power GND should go directly to the power supply.
to avoid GND loops.

If the G250X doesn't step when its step pin changes from ~0V to ~5V
under 7I96S control, that really suggests a wiring issue.
 

Yes, sorry old programmer issue all indices start at 0. So more correctly, 1-4, 5-8, 9-12, 13-16, 17-20, and 21-24

Are you suggesting the issue is II need to tie PSU ground to earth? Does earth no pass through the PSU?

My 48v PSU and 5/12v PSU share the same 0v source; I have one shared set of DIN terminals jumpered together for 0v. Further, I have continuity between the ground pin 2 on the 7i96s 5v power connector and the ground pins 1-4 of the G250x.

Do I need to tie the 0v terminals to earth on the 250v main power?

As I stated previously, my knowledge of electronics is somewhat dated.

I thought if I connected the V- (48v PSU) and COM (5v/12v PSU) to earth, I was potentially creating a Ground Loop, which I understood was potentially harmful to electronics. But I do realize that this means I have a floating ground.

So, I tied V- and COM to earth. However, this did not resolve the issue I am having.

I did find that my spindle contactor was closed as soon as I powered the system, so I have something misconfigured there.