No Arc after first cut

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08 Nov 2020 00:16 #188635 by wade956
Hi all, recently got my machine going with plasmac and using a MESA THC card. My problem is when it finishes a cut it faults with no arc right at the very end of that cut.
During that first cut THC moves Z axis and controls the height. Any help would be appreciated, thanks.

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08 Nov 2020 07:49 - 09 Nov 2020 00:22 #188655 by phillc54
Replied by phillc54 on topic No Arc after first cut
If it similar to:
forum.linuxcnc.org/plasmac/40536-losing-arc-on-holes#188491
or:
forum.linuxcnc.org/plasmac/40308-some-th...smac?start=50#188257

I have just pushed a fix.

From the docs:
Some plasmac machines may lose the Arc OK signal momentarily during a cut causing PlasmaC to go into a lost arc error. There is a HAL pin to enable a delay time which will prevent a short Arc OK loss such as this. The pin is named plasmac.arc-lost-delay and this pin sets the amount of time (in seconds) PlasmaC will wait after losing the arc during a cut until it extinguishes the Arc OK signal and displays an error message. The following code would set a delay of 0.1 seconds.
setp plasmac.arc-lost-delay 0.1
The recommended place to put this code is in the <machine_name>_connections.hal file.
This setting should only be used if the plasma machine exhibits the above symptoms.
Last edit: 09 Nov 2020 00:22 by phillc54.
The following user(s) said Thank You: tommylight

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08 Nov 2020 16:32 #188672 by wade956
Replied by wade956 on topic No Arc after first cut
Hi thanks for the help. When I paste it on that file I get the attached error.
Attachments:

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08 Nov 2020 18:45 #188680 by tommylight
Replied by tommylight on topic No Arc after first cut
Might have to wait for the buildbot to update then do a dist-upgrade
The following user(s) said Thank You: wade956

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