wrong scale thc of the z axis during cutting on qtplasmac

Yes, the THCAD 10 can withstand 500v input indefinitely.  So 12.5v won’t hurt it

Change the hardware to get 20:1 division and remove any scaling resistors from the thcad. That will give you a 200 v full scale and you are only interested in cutting volts which should always be < 150 volts on  what you've said.

There has been another update to prevent this issue:
forum.linuxcnc.org/plasmac/37233-plasmac-updates#216006

Note that this update creates a hal pin and a net connection for plasmac.thc-feed-rate.

This pin needs to be set to the maximum available velocity and previously was not setting correctly for some non english locales.

This update may cause some issues for existing configs where plasmac.thc-feed-rate was set in a hal file. If your config has this command it is recommended that it be removed and that the THC SPEED in the Parameters tab is set to the default value of 10 unless test cuts show that a different value is warranted.

I chose the simplest solution found in my components two resistor 1 megaohm 0.1%, do I put them near the thcad10 or one in the torch plug and the other in the ground box?

I finally managed to repair the plasma generator .. very critical fast secondary diodes and the manufacturer has seen fit to hide them in a closed block.

Hello .  Yesterday updated to version 1.0.72 and the Z axis stopped responding to signals from thc.  Up and down lights do not come on.  the burner is kept at a constant height above the metal sheet.  Today i installed 1.0.73 and it's the same effect.

sibista wrote:

Hello .  Yesterday updated to version 1.0.72 and the Z axis stopped responding to signals from thc.  Up and down lights do not come on.  the burner is kept at a constant height above the metal sheet.  Today i installed 1.0.73 and it's the same effect.

Any idea what version you were on before you upgraded?

Can you post a backup of your config please?

I assume you are using Mode 2 (external THC)?

Version 1.0.56 fixed the thc scale problem and everything was fine. I'm using mode 2. I want to backup config but I get an error: Traceback (most recent call last):File "/usr/share/qtvcp/screens/qtplasmac_4x3/qtplasmac_4x3_handler.py", line 1352, in backup_clickedself.dialog_show_ok(QMessageBox.Information, head, '{}:\n{}\n\n{}:\n{}\n\n{}\n'.format(msg0, logname, msg1, bkpName, msg2))NameError: name 'logname' is not defined 

sibista wrote:

Version 1.0.56 fixed the thc scale problem and everything was fine. I'm using mode 2. I want to backup config but I get an error: Traceback (most recent call last):File "/usr/share/qtvcp/screens/qtplasmac_4x3/qtplasmac_4x3_handler.py", line 1352, in backup_clickedself.dialog_show_ok(QMessageBox.Information, head, '{}:\n{}\n\n{}:\n{}\n\n{}\n'.format(msg0, logname, msg1, bkpName, msg2))NameError: name 'logname' is not defined 

V1.0.56 was prior to a change that was submitted to split Modes 0 and 1 from Mode 2 in the plasmac.comp. I'd guess there is a bug there. Phill will have a peek at it I'm sure.

The backup error will also be corrected shortly. A massive amount of work was done to internationalize QtPlasmaC, and probably a few slipped through the cracks. In the meantime, you could just make compressed file of your config folder and post it here.

I would guess that based on the timing of versions, there's a bug in the plasmac.comp file, however never hurts to see the config folder.

EDIT: no bug