Control driver's power through linuxcnc

rodw wrote:

I had a bit of a look at the halui pins and I did not see one that leapt out at me but you could achieve it with estop-latch.
Its not well documented but it is designed to build an estop chain in software.

As my machine grew, I added more estops so moved them all to estop-latches chained together. One of them was for a plasma torch breakaway which triggered an e-stop so that is functionally equivalent to what you want. You can trigger a relay from one of the e-stop outputs. Here is a complex example from my config. You can see I turn a few things on and off with the estop-out signal.(relays and warning lights)

Warning: Spoiler!

# --- ESTOP CHAIN STARTS ---
net latch-reset <= iocontrol.0.user-request-enable 
net latch-ok-in <= iocontrol.0.user-enable-out 

net latch-ok-in => estop-latch.0.ok-in
net latch0-out <= estop-latch.0.ok-out 
net latch0-out => estop-latch.1.ok-in
net latch1-out <= estop-latch.1.ok-out 
net latch1-out  => estop-latch.2.ok-in
net latch2-out <= estop-latch.2.ok-out 
net latch2-out => estop-latch.3.ok-in
#net latch3-out <= estop-latch.3.ok-out 
#net latch3-out => estop-latch.2.ok-in

net latch-reset => estop-latch.0.reset
net latch-reset => estop-latch.1.reset
net latch-reset => estop-latch.2.reset
net latch-reset => estop-latch.3.reset
net latch-out iocontrol.0.emc-enable-in <= estop-latch.3.ok-out
net estop-out estop-latch.3.fault-out

# --- EXTERNAL ESTOP SWITCH - CONTROL BOX---
net external-estop <= hm2_7i76e.0.7i76.0.0.input-00
net external-estop => estop-latch.0.fault-in

# --- EXTERNAL ESTOP SWITCH - CONSOLE ---
net console-estop <= hm2_7i76e.0.7i76.0.0.input-31-not
net console-estop  => estop-latch.3.fault-in


# --- PENDANT ESTOP SWITCH ---
net pendant-estop <=  hm2_7i76e.0.7i76.0.0.input-26-not
net pendant-estop => estop-latch.1.fault-in 

# --- TORCH BREAKAWAY E-STOP ---
net torch-breakaway <= hm2_7i76e.0.7i76.0.0.input-06
net torch-breakaway => estop-latch.2.fault-in

# --- E-STOP STEPPER DRIVE DISABLE ---
net estop-out hm2_7i76e.0.7i76.0.0.output-05

# --- E-STOP RED WARNING LIGHT ---
net estop-out hm2_7i76e.0.7i76.0.0.output-00
net estop-out hm2_7i76e.0.7i76.0.0.output-10
# --- ESTOP CHAIN ENDS ---

Muz94 wrote:

However, just to be clear, i'm going to switch to a 7i96 sooner than later, so i would not focus on the charge pump, i'd rather prepare a good schematic and then implement the whole estop circuit when i'll install the mesa board.

Muz94 wrote:

but for now the e-stop just stops the program, if something really goes wrong i still can't cut the power.

# --- E-STOP STEPPER DRIVE DISABLE ---
net estop-out hm2_7i76e.0.7i76.0.0.output-05