Bug #34
closed
Added by Anonymous about 12 years ago.
Updated over 11 years ago.
Description
From the forum, file stops running:
When I execute a file, it stops running at some point.
Never the same point in the file, though.
The display still says: RUNNING 1%
But the machine quits.It doesn't resume.
I've also observed this on my laser cutter, problem is definitely intermittent and hard to reproduce reliably.
Seems like either a hardware or a firmware interrupt problem, since the same job doesn't always hang, nor in the same place.
Might be an idea to set up a single test job which hangs, and then try it on different units.
This also brings up the need for a diagnostic mode (w/ docs), so that we have at least some chance of figuring problems like this out.
We have found some pointers to this problem:
1) I2C communication with display.
2) Possible power drops on 5V of the laser power supply
3) Interrupts due to heavy ethernet communication
Possible remedies:
1) Disconnect the I2C display (it is reported that the laser resumes when you do this while it hangs)
you may want to disable it also in the config file (set sys.nodisplay 1)
2) Connect 5V to separate 5V power supply
3) Disconnect the ethernet while lasering
If you observe these problems, please report:
1) Firmware version?
2) Do you have an I2C display?
3) Did disconnecting the Ethernet help?
I've been using JCW's laser cutter for a few hours today with no hangs or freezes whatsoever. If the issue reappears I'll try disconnecting either the I2C display or the ethernet cable (or both).
I've had 3 crashes yesterday during cutting. All 3 happened after I touched the display on the Amersfoort Fablab Laos laser.
I think there is an ESD problem with the display hardware. The plexiglass used to hold the display in that laser makes it easy to build up a static charge, which could disrupt the AVR controller on the display if it discharges trough one of the IO pins or even power or ground.
- Status changed from New to Closed
no updates here for months, new firmware has been stable on several machines; closing this one....
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