help-no voltage across mesa 7i96s spindle TB-2 pins 23 and 21

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04 Oct 2024 03:32 - 04 Oct 2024 04:14 #311264 by PhilipME
I ran the servo motor in speed mode with potentio-meter. It ran fine.
but when I connected the servo driver to the mesa 7i96s, and configured the machine via pcconf wizard, I could not get the servo to run. The servo is running at low rpm but not responding to the axis spindle user interface. No voltage detected across pin 21 and 23 of  the mesa TB2

The x,y,z stepper motors running fine via jogging in axis interface.

Not interrested at this time in bi-directional operation. 

below find the pcconfig relevant pages, I will also include in a second post the connection diagram and spindle driver manual

Good day

Philip

 
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04 Oct 2024 03:36 - 04 Oct 2024 03:42 #311265 by PhilipME
this is how I wired. 

I also connected pin 6 (servo motor enable to common , not shown in the diagram)of the driver 

 


 
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04 Oct 2024 06:42 - 04 Oct 2024 06:51 #311268 by PhilipME
I found the mistake

pin 21 on the mesa should be no connection 

and the agrnd in the driver should be connected to ground

working like a charm, I just need to replace the resistor with slightly smaller like .3 kohms. I started with slightly larger resistor to avoid getting more than 10vdc to the motor driver

sorry for such non-adding value posts. it is uncharted road for me.

Good day

Philip
Last edit: 04 Oct 2024 06:51 by PhilipME.
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