Hello All,

I periodically try to start Linuxcnc without turning on my CNC controller. When 
I do I get the error message that indicates it is not finding the 7i76.  
However, when I turn on the controller before Linuxcnc is initialized my 
steppers growl until Linuxcnc is initialized. 

So, I have been thinking about putting a power relay in the controller that 
would not turn on the power to the stepper power transformer until after 
Linuxcnc initialized using some signal like “machine-is-on”. So I would turn on 
power to the controller box before starting Linuxcnc but that would only turn 
on the 24v field power. The 5v power to the 7i76 comes from the 5i25 board. 

The lathe spindle power is currently controlled by a relay activated by 
machine-is-on, but I would probably change that to spindle-enable.

Does this idea make any sense?

Alan

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