1 or 2 dedicated 120VAC circuits for my CNC?

tommylight wrote:

Use the Mist and/or Flood pins that already exist in LinuxCNC, just having those in hal will enable them and also show them in the Axis GUI.
Append the output pin to them, then in gcode adding M7 and/or M8 with M9 will happily turn on or off whatever is wired to those pins.
Something like
net coolant-flood hm2_pci-5i25.0.0.7i77.output-12
net coolant-mist hm2_pci-5i25.0.0.7i77.output-13
Edit the pins to suit your system/boards/wiring.

Thanks Tommy. This will get me headed in the right direction. What if I am using gmoccopy? Will I have to do something different?

OK so I added the following lines to my HAL file.

# external output signals
# --- ROUTER-ON ---
net coolant-mist   =>     hm2_7i76e.0.7i76.0.0.output-15
# --- DUST-COLLECTOR-ON
net coolant-flood   =>  hm2_7i76e.0.7i76.0.0.output-01


#  ---coolant signals---
net coolant-mist      <=  iocontrol.0.coolant-mist
net coolant-flood     <=  iocontrol.0.coolant-flood

I am able to see them trigger ON in Halshow using M7 & M8. I can also trigger them OFF with M9. BUT when they are triggered ON there is no power to my circuits (Output pins 15 and 01). I must be missing something. 
 

Yes I have it correct. It is the second pin.

I checked the pins and both pins are triggering in Halshow. Both pins are providing 24VDC when triggered.

Once I reconnected the wires and tested again, the router circuit now works as expected, but the dust collector circuit gives me a "Smart serial card remote error = (27) Over Current" error. I have researched this and I think my problem is that there is no flyback diode on the dust collector relay. Does this sound correct? If yes, can you tell me what diode I need to get and exactly how it should be soldered in?

Thanks