Mesa 7i77 and CNC Mill Spindle Brake

Hello,

I have an Anilam Crusader M 3 axis mill and am getting ready to do a retrofit on it to Linux CNC. I am using the Mesa 5i25 and the 7i77 cards. 

I have manual tool changing on the mill. The spindle brake on the original mill uses an air cylinder tied to a 24v DC solenoid to apply and release the brake. When the program calls a new tool, the spindle is turned off and the brake applied. When tool change is complete you would hit "start" on the control and that would release the brake and start the spindle simultaneously.

How could I do this with the Mesa 7i77? 

Any help is greatly appreciated so I can draw the wiring diagram to get started.

Thanks,
Steve

If I use a VFD can I use a breaking resistor and the 24v NC/NO contacts to actuate the air solenoid for the brake? So when spindle is "on" contacts are closed. When new tool is called VFD breaks the spindle and the NO contacts operate the air cylinder for the brake. At spindle start, brake will disengage when 24 v is removed. Would that work? If so it sounds much simpler than doing anything in the HAL file.

Thanks!!!
-Steve

I looked at an Automation Direct VFD that has a 24v DC control circuit (R10). Could I use that to turn the solenoid on  for the pneumatic brake actuator when the spindle is stopped so I can change tools? I have attached the page from the manual.  

Thanks,
Steve

Sorry I double posted the VFD info. I just figured out how to delete the 2nd one.

Thank You,

-Steve