Hypersensing with THCAD - better way to do ohmic sensing

PlasmaC has an output pin named plasmac.state-out that you may be able to use.

The states begin at 0 and in order are:
IDLE, PROBE_HEIGHT, PROBE_DOWN, PROBE_UP, ZERO_HEIGHT, PIERCE_HEIGHT, TORCH_ON, ARC_OK, PIERCE_DELAY, PUDDLE_JUMP, CUT_HEIGHT, CUT, PAUSE_AT_END, SAFE_HEIGHT, MAX_HEIGHT, FINISH, TORCHPULSE, PAUSED_MOTION, OHMIC_TEST, PROBE_TEST, SCRIBING, CONSUMABLE_CHANGE_ON, CONSUMABLE_CHANGE_OFF, DEBUG

I've been monitoring the plasmac.state-out pin. During jog moves between cuts it is at state 0 (idle). The other one I watched was plasmac:motion-type, which had a output of 1 during a jog. Either of these could be used, but how can we invoke an interrupt (pause) condition for plasmac? Is there a global pause hook we could tap?

Do you want to pause plasmac?

Yes, I'd like it to mimic the situation where ohmic probe triggered outside of probe state. Raises Z to safe height.

That would take some code changes to plasmac.

If you want realtime you could set motion.feed-inhibit to 1 which pauses motion. You would probaly need to latch it for safety because as soon as it resets to 0 the motion will continue.

If user space is good enough you could tie into: this exists in plasmac.tcl, you would need to break it and or it to your connection I guess.

Neither of these methods would give you an y error messages, they would just pause the machine.

Thanks, I'll give these a shot, could work just as well. My magnetic breakaway has about 2-3 degrees of alignment error due to no locating features other than matching pairs of magnets. A collision may not be enough to break the torch away, but enough to knock it off square. An ohmic trigger would prevent it