Force a write of "linuxcnc.var" file from code.

eneias_eringer
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9 years 1 month ago #98526 by eneias_eringer

Replied by eneias_eringer on topic Force a write of "linuxcnc.var" file from code.

I have the same problem , in my case , i lost the touch probe calibration !!!

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cmorley
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9 years 1 month ago #98578 by cmorley

Replied by cmorley on topic Force a write of "linuxcnc.var" file from code.

IIRC Linuxcnc writes out the var file when the mode is switched.
The glade widget offset_widget.py there is code like this:

Code:

                if self.status.task_mode != self.linuxcnc.MODE_MDI:
                    self.cmd.mode(self.linuxcnc.MODE_MDI)
                    self.cmd.wait_complete()
                self.cmd.mode(self.linuxcnc.MODE_MANUAL)
                self.cmd.wait_complete()
                self.cmd.mode(self.linuxcnc.MODE_MDI)
                self.cmd.wait_complete()

This causes a mode switch (from MDI to manual and back to MDI) which writes out the var file.
Maybe you could make an Mcode that calls a similar python routine to do this.
Just another idea

Chris M

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eFalegname
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9 years 1 month ago #98580 by eFalegname

Replied by eFalegname on topic Force a write of "linuxcnc.var" file from code.

Instead, I found a temporary solution to this problem, it's a shame that the definitive solution never came.
www.google.it/search?q=pc+backup+power+s...ygC&biw=1361&bih=645

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Askjerry
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9 years 1 month ago - 9 years 1 month ago #98615 by Askjerry

Replied by Askjerry on topic Force a write of "linuxcnc.var" file from code.

cmorley: I'll be getting home on Saturday... and I'll verify this again... but it doesn't appear to work.

If you watch my video about 10 minutes in (QUICK LINK) you can see that after setting the home and zero points... I switched between MDI and MANUAL... but after the power fail simulation at 11:30 in the video... when it comes back... the file contains all blanks.

Again... I'll verify this... but looking at the video... you can clearly see where I switched modes a couple of times.

M-Codes: Funny you should mention that... it's the next video I'll write... how to make custom M-Codes. Perhaps if the change is software driven vs. human clicking the screen... it might make a difference. Still looking for that self.variable.write("somefile") kind of command tho.

eFalegname: Yes... it looks like we need a UPS for protection... should actually have that anyway. But the issue has me interested in finding a software fix. I've been lucky... I never had a power failure while running... it wasn't until seeing Peter's video (QUICK LINK) that I even thought about it.

Thanks,
Jerry

Last edit: 9 years 1 month ago by Askjerry.

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Force a write of "linuxcnc.var" file from code.