G540, Relay Board and VFD

[ZJGardner]

Hello,

I've been running a G540 on my 3 Axis CNC Router for 2 years now. This is a huge upgrade from the previous board. However, I have a relay board and VFD sitting around that I would love to be able to use with my router. Being that the G540 switches pins 5 and 6 to ground, I am not sure how or if it is possible to connect my relay board to the G540.

The relay board I am using is the one below:
Probotix RBX-1 3-Channel Opto-Isolated Relay Board
https://www.probotix.com/RBX-1-3-Cha...ed-Relay-Board

I am also using a Hitachi router as my spindle. I would love to be able to hookup my VFD to this router. It looks like the VFD uses 2-5V signals for control, but the G540 uses 0-10V. Is it possible to make this VFD work with a G540?

The VFD board is:
CNC4PC C47 A/C Speed Control
https://www.cnc4pc.com/c47-a-c-speed...lay-board.html

Thanks for your help.

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[Happy Feet]

i think you could drive ur vfd through modbus.