Proma THC 150 setup issues

Gantries with dual motors benefit from using the master branch which has the joint/axis branch merged into it. I know a lot of gobble goop but in any case that branch handles gantries correctly.

Very nice machine and I like the mobility which is a must in my shop for many things.

JT

Nice setup.
There is a post in that thread that mentions editing a line in stepper.hal
in line:
#setp stepgen.2.maxvel [AXIS_2]MAX_VELOCITY
You need to remove # , save and start Lcnc.

The only things i can point a finger at is the acceleration of the Z axis might be to much, so lover it to 10 and stepgen acceleration to 12.5.
I did the calculations and all looks fine, but since Z axis is controlled by thc.hal that might be the reason.
Also the velocity as far as math is concerned is all good, but again controlled by thc so might not be able to follow that quickly.
As experience taught me, i never push Z axis above 900mm/minute (15mm/sec or 0.6inches/sec), that has proven the best value for thc with proma as it is most stable during cutting (no bunny hopping), and is enough to follow over 5cm of difference at a distance of 30cm during cutting at 3meters/minute.
If you do not mind, set it as mentioned above and give it a try.
As for teleop error, i never got that so, if you still get that after changing settings, give us a shout.

HommemadeNJ (NJ is for New Jersey, right?), i have to go get some zzzzz, i am up since 8AM and it is 3:35 AM now.
Later,
Tom

Just checked your ini again, last night i missed that you changed the min_ferror for Z axis. You can not change that, it has to waaaay higher ( i have it set at 500). Z axis is controlled by thc.hal so it will not work with your setting.

B.T.W, i have a brother living in NJ.

When you do get to testing it, follow this short procedure so you do not have to hunt around for problems that might arise:
---on the Proma THC
--set the hysteresis at 2,
--set the voltage difference at 2 (or 1 i can not remember as all 4 of mine are gone to various machines)
--set the voltage to 140
--put it in test mode ( press both buttons till you see TST) and check if the UP/DOWN, ARC OK signals are in order and corresponding to up/down arc ok from the THC
Now on LinuxCNC check the "switch travel" and adjust it accordingly, also the pierce height (GAP)set to 3mm
Press F9, it should move the torch down till it hits the material and continue moving down till it triggers the floating switch, move up to pierce height and fire the torch. If all is well, it should pierce and start moving Z axis down slowly. Stop with F9 or ESC.
Now set you jog speed to something corresponding to your test metal thickness ( for 3mm--1/8inch set it to 1500mm/m or 60IPM and 40 to 50 Amps) .
Again press F9 and when you get the ARC OK press the arrow key to move, watch if the torch is going up or down and the aprox distance from the metal. If all is OK, you should have the torch moving to high so just set the THC to a lover voltage and test again.
After 2 or 3 tries you should get nice cuts so now you can move on to testing actual cutting and finding a nice cutting height and feed speed.
Only after all this you can test and set the THC following speed, so set the metal plate at an angle aprox 3 to 4cm high on one side and flat to the table on the other. Do a test cut climbing the plate and dropping down. Set the "step size" lower or higher so you get it to follow that slope at a distance of at least 30cm (12inch) smoothly without to much of up/down torch movement.
That is it, now all you need is to set the Amps, feed and rarely voltage on the THC depending on the thickness of the material.
It will take a bit of testing to get nice clean cuts without to much dross.

He is in Clinton.