Unable to restart after power cut

danny_swbc

I have a hobbyist cnc that has a Duet 3 Main Board 6HC controlling it.

On my previous machine it was the earlier Duet board and if there was a power cut when the power came back on it was possible to resume the job from when it stopped.

The current one does not have this and if there is a power cut and you are several hours into a job it all lost. In addition it will not remember the last work zero position if switched off.

Obviously there is some code that isn't in the current files that was in the last.

I'd like to sort this out as I've just had a power cut that wasted 3hrs of machine time and the workpiece.

Any suggestions?

Thanks

droftarts

@danny_swbc Most likely pause/save and resurrect isn't set up. See https://docs.duet3d.com/en/User_manual/Tuning/Resume

Are you running the 6HC from a Raspberry Pi, in SBC mode? It's possible that the power demands mean it shuts down before the machine state can be saved.

Ian

danny_swbc

This post is deleted!

danny_swbc

@droftarts sorry its not SBC, its just via the ethernet port which was the same as the previous earlier version of the duet I had and that was fine for saving the work zero between sessions and also for resuming after a power cut. Thanks

droftarts

@danny_swbc Please post your config.g, and response to M115 and M98 P"config.g".

Can you remember how you saved the work zero between sessions with the old Duet? Did you run a macro, or just turn the machine off, and it showed the correct position when you turned it back on? What was the old machine? I may be able to look up the configuration of that machine, if you don't have a copy of the old configuration.

Ian

danny_swbc

@droftarts it was a Duet 2 as far as I remember, the one that generated its own wifi access point.

I never changed any of the settings other than the ones to designate the size of the work area.

The initial settings as it came saved work zero between sessions automatically and also saved where it was if there was a power cut.

I may have a copy of the old sd card for it somewhere so I will try and see if I can find anything on there no one the newer duet settings.

Thanks

danny_swbc

so, yet another power cut today and two more pieces of work lost and I still can't figure out the issues

in the config.g file the M911 line is exactly the same

both have resurrect. g and resurrect-prologue and resume

with the current power failure the smaller of the two machines a 1010 I have checked the sd card and it actually has the details of the file it was running saved under the resurrect.g file but there seems to be no way to call that on the web interface.

The previous one had a resume from power cut button or similar as far as I remember

getting really frustrating now especially with a few power cuts each month that invariably happen when work is on the machine

danny_swbc

CURRENT 1010 config.g PREVIOUS 1010 config.g

droftarts

@danny_swbc What firmware version are you using? Send M115 and post the response. Your config.g calls another file, customconfig.g. Is there anything in that? Please also post your resurrect-prologue.g and latest resurrect.g files.

Have you read through the advice in the wiki page here? https://docs.duet3d.com/en/User_manual/Tuning/Resume

From the above wiki page, to use the resurrect.g file, you send M916:

After the power is restored, you can use command M916 to resume the print from where it stopped. This command runs file sys/resurrect.g which calls sys/resurrect-prologue.g at an appropriate point to home the printer

If you pause during a job, does it create a new resurrect.g file (it should)? Delete any resurrect.g file then test by turning off power during a job, does it create a resurrect.g? If you're connected via DWC, it should show whether a resurrect.g is saved.

The resurrect.g should save all the workplace coordinates in it. While I don't use workplace coordinates in my test setup, I've just tested the functionality, and it is working in the current firmware. This is the resurrect.g that was created:

; File "0:/gcodes/x_carriage_IAN.gcode" resume print after print paused at 2023-06-26 12:48
G21
M140 P0 S60.0
G92 X16.119 Y7.463 Z3.600
G60 S1
G10 P0 S195 R200
T0 P0
M98 P"resurrect-prologue.g"
M116
M290 X0.000 Y0.000 Z0.000 R0
T-1 P0
T0 P6
; Workplace coordinates
G10 L2 P1 X0.00 Y0.00 Z0.00
G10 L2 P2 X0.00 Y0.00 Z0.00
G10 L2 P3 X0.00 Y0.00 Z0.00
G10 L2 P4 X0.00 Y0.00 Z0.00
G10 L2 P5 X0.00 Y0.00 Z0.00
G10 L2 P6 X0.00 Y0.00 Z0.00
G10 L2 P7 X0.00 Y0.00 Z0.00
G10 L2 P8 X0.00 Y0.00 Z0.00
G10 L2 P9 X0.00 Y0.00 Z0.00
G54
M106 S1.00
M106 P0 S1.00
M116
G92 E0.00000
M83
M486 S-1
G17
M23 "0:/gcodes/x_carriage_IAN.gcode"
M26 S706324
G0 F6000 Z5.600
G0 F6000 X16.119 Y7.463
G0 F6000 Z3.600
G1 F1800.0 P0
G21
M24

This is the console output in DWC from turning off the power in the middle of a job:

26/06/2023, 12:48:20 	M0
Printing paused at X16.1 Y7.5 Z3.6
Cancelled printing file 0:/gcodes/x_carriage_IAN.gcode, print time was 0h 2m
26/06/2023, 12:48:18 	M25
Resume state saved
26/06/2023, 12:45:19 	M916
File 0:/gcodes/x_carriage_IAN.gcode selected for printing
26/06/2023, 12:43:30 	Connection established
26/06/2023, 12:43:16 	Connection interrupted, attempting to reconnect...
HTTP request timed out
26/06/2023, 12:43:07 	Resume state saved
Print auto-paused due to low voltage

getting really frustrating now especially with a few power cuts each month that invariably happen when work is on the machine

To be honest, if it's happening that frequently, I think complaining to your electricity supplier and/or a robust power backup solution would be better options.

Ian