Kirk Wallace wrote:

>Other than obviously enabling the AXIS interface, what is the power
>button meant to do? 
>  
>
Actually, it doesn't enable the interface - that's a side effect ;)  
EMC2 has three states of being (some poorly named, but I won't get into 
that):
1) ESTOP - EMC2 will not command any motion, and it holds its e-stop 
output asserted.
2) ESTOP-Reset - EMC2 will not command any motion, but it does not 
assert the e-stop output.
3) Machine On - in this state, the machine is expected to be able to 
perform motion, and EMC2 will operate normally

Pressing F1 or the EStop button toggles from ESTOP to ESTOP-Reset
Pressing F2 or the "power on" button toggles from ESTOP-Reset to Machine 
On, or has no effect if the machine is in ESTOP

I think there's more information on estop and machine modes, but this 
should be a "close enough approximation" for now :)

- Steve

>Kirk Wallace
>  
>


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