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!

Code:

# --- 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: However at the moment the heating is all managed by an arduino with a hand made "shield", it's connected to the pc throug serial (via usb) and it communicates with linucnc by a userspace hal component (a simple python script that manages the communication with the arduino and checks for alarms that should trigger the e-stop).
Even the e-stop latch works (i can trigger the e-stop if i call M104 and the thermistor is not connected or if i detect a temperature out of a "safe range"), but for now the e-stop just stops the program, if something really goes wrong i still can't cut the power.

Muz94 wrote: but for now the e-stop just stops the program, if something really goes wrong i still can't cut the power.