Recent PlasmaC Update and No Motion

PurduePete wrote:

I recently updated PlasmaC. Usually dont do many updates so I was a bit behind. Been struggling to get hypersense working properly so one thing a friend and I tried was updating the plasmac and running ohmic3 component. After the update and making sure that configurator.py ran upgrade, I can't get any motion from the machine after pierce. When starting a program, it will move to position. After piercing the material it does not move from the pierce position at all. It will hover for 3-4 seconds with a read out on arc voltage and showing arc ok. But it hovers long enough to blow a hole so that src voltage cant be established to sufficiently meet the arc ok requirements. If the program is restarted, the arc wont even come close to establishing. Just get valid arc lost error. The arc ok light is on and everything appears good, so I'm baffled.

Does anyone have any suggestions on what to look at? I run mode 0 and have not had a problem before.

# ---OHMIC signals---
#0V = 139.8 KHz
#5v = 953.9 KHz
setp hm2_5i25.0.encoder.01.scale -1
setp hm2_5i25.0.encoder.01.counter-mode 1
setp hm2_5i25.0.encoder.01.filter 1

loadrt  ohmic3                  names=ohmicsense
addf    ohmicsense              servo-thread
loadrt  or2                     count=1
addf    or2.0                   servo-thread
 
setp ohmicsense.thcad-0-volt-freq    139800
setp ohmicsense.thcad-max-volt-freq  953900
setp ohmicsense.thcad-divide         32
setp ohmicsense.thcad-fullscale      5
setp ohmicsense.volt-divider         4.9
setp ohmicsense.ohmic-threshold      23.5
setp ohmicsense.ohmic-low            21.5
setp ohmicsense.mode                 1 
setp ohmicsense.num-readings         10
net ohmic-vel ohmicsense.velocity-in <= hm2_5i25.0.encoder.01.velocity

net ohmic-true ohmicsense.ohmic-on => debounce.0.2.in
net plasmac:ohmic-enable plasmac.ohmic-enable => ohmicsense.is-probing

net plasmac:motion-type => ohmicsense.motion-type-in
net ohmic:power <= ohmicsense.power-on

net plasmac:ohmic-enable => or2.0.in0
net ohmic:power => or2.0.in1
net or-out or2.0.out => hm2_5i25.0.7i76.0.0.output-01

PurduePete wrote:

I was running ohmic before switching to 3. So I skipped 2.

Yes, the connections hal was updated to ohmic3. Also tried changing it back to just ohmic without any effect.

Yes, I am using the resistor.

I should have been more specific, sorry about that. Yes I am running mode 0 for ohmic comp.

My connections looks at minimum similar to this. When using the meter my ohmic voltage reading was offset by about 4v to start with so my values are a bit higher.

loadrt ohmic names=ohmicsense
addf ohmicsense servo-thread

# --- 7i76e ENCODER 2 SETUP FOR OHMIC SENSING---

setp hm2_7i76e.0.encoder.01.scale -1
setp hm2_7i76e.0.encoder.01.counter-mode 1

# --- Configure the component ---

setp ohmicsense.thcad-0-volt-freq    140300
setp ohmicsense.thcad-max-volt-freq  956200
setp ohmicsense.thcad-divide         32
setp ohmicsense.thcad-fullscale      5
setp ohmicsense.volt-divider         4.9
setp ohmicsense.ohmic-threshold      29
setp ohmicsense.ohmic-low            24

#****** depending where you have the second thcad connected, 00 is A channel encoder 1,
#****** 01 is B channel encoder 1, 02 is for phils custom firmware because he blew something up.

net ohmic-vel ohmicsense.velocity-in <= hm2_7i76e.0.encoder.01.velocity

# --- Replace Plasmac’s Ohmic sensing signal ---

unlinkp debounce.0.2.in
net ohmic-true ohmicsense.ohmic-on => debounce.0.2.in
net plasmac:ohmic-enable    =>  ohmicsense.is-probing

setp hm2_7i76e.0.encoder.01.filter 1

setp ohmicsense.mode                 1 
setp ohmicsense.num-readings         10

rodw wrote:

What power supply are you using for ohmic? If you use the recommended power supply you need to fine tune it to output 24 volts with a good multimeter.