Resurrect extruding failure

T3P3Tony

@chickenwoman said in Resurrect extruding failure:

;M83 ; ...but relative extruder moves

are you setting relative extruder moves in you slicer star gcode or are you actually usin absolute extruder moves? (you can check if the gcode files you are printing has the E value in lots of small number or if its increasing steadily). to fix it i would set the slicer to use relative moves and have the m83 not commented out.

chickenwoman

@T3P3Tony Commenting M82 was part of my trouble shooting with firmware 2.04RC4+1 and it had no effect. I don't think I enabled M82 with my test since upgrading to firmware 2.04. I'll try today. I don't have absolute written in my gcode start but Cura puts it there by default. I can try with M83 in my start code. With a bowden setup which is better to use, relative or absolute? I also have a Duet rotating filament sensor that keeps fasly triggering. I tuned it like the instructions said. Would absolute effect that? Thanks

chickenwoman

Here's a small example of the Cura gcode file.
;FLAVOR:Marlin
;TIME:18405
;Filament used: 59.2988m
;Layer height: 0.4
;Generated with Cura_SteamEngine 3.6.0
M140 S60
M105
M190 S60
M104 S215
M105
M109 S215
M82 ;absolute extrusion mode
G28 ;Home
G1 Z15.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0
G92 E0
G1 F2400 E-2
;LAYER_COUNT:426
;LAYER:0
M107
M204 S5000
G0 F4500 X248.378 Y275.919 Z0.3
M204 S500
;TYPE:SKIRT
G1 F2400 E0
G1 F1800 X248.249 Y277.157 E0.1242
G1 X248.208 Y277.936 E0.20203
G1 X248.247 Y278.714 E0.27976
G1 X248.366 Y279.484 E0.3575
G1 X248.563 Y280.239 E0.43536
G1 X248.837 Y280.969 E0.51316
G1 X249.183 Y281.667 E0.5909
G1 X249.6 Y282.326 E0.66871
G1 X249.859 Y282.672 E0.71183
G1 X250.356 Y283.297 E0.79151
G1 X250.872 Y283.882 E0.86934
G1 X251.445 Y284.41 E0.94709
G1 X252.069 Y284.877 E1.02486
G1 X252.738 Y285.278 E1.10269
G1 X253.444 Y285.608 E1.18045
G1 X254.18 Y285.864 E1.2582
G1 X254.939 Y286.043 E1.33601
G1 X255.355 Y286.107 E1.37801
G1 X257.597 Y286.39 E1.60349
G1 X257.168 Y286.955 E1.67428
G1 X256.763 Y287.621 E1.75205
G1 X256.429 Y288.325 E1.8298
G1 X256.407 Y288.388 E1.83646
G1 X256.309 Y288.5 E1.85131
G1 X255.861 Y289.137 E1.92902
G1 X255.664 Y289.488 E1.96918
G1 X255.336 Y289.836 E2.0169
G1 X254.863 Y290.455 E2.09463
G1 X254.735 Y290.664 E2.11908
G1 X254.433 Y290.939 E2.15984
G1 X253.914 Y291.52 E2.23757
G1 X253.689 Y291.831 E2.27587
G1 X253.504 Y291.963 E2.29855
G1 X252.918 Y292.477 E2.37633
G1 X252.476 Y292.954 E2.44121
G1 X252.467 Y292.959 E2.44224
G1 X251.802 Y293.366 E2.52004
G1 X251.182 Y293.838 E2.59779
G1 X251.059 Y293.954 E2.61466
G1 X250.055 Y294.228 E2.7185
G1 X249.314 Y294.472 E2.79634
G1 X248.729 Y294.734 E2.8603
G1 X248.332 Y294.471 E2.90782

T3P3Tony

I think you can use absolute extrusion but its much easier to work with relative extrusion (in my opinion) especially when you start doing things like power fail resume. The biggest issue is having a mismatch between them which is what i think is the issue with power fail resume here as you are using absolute extrusion in the slicer (by the look of the file you just posted) but relying on relative extrusion in resurrect prologue by the look of it.

Try slicing a file in relative extrusion mode and testing with that set throughout.

dc42

@chickenwoman, is it extruding continuously, or in bursts as if it is printing without any XY movement?

chickenwoman

@dc42 it's extruding continuously. I'm going to test things today with relative extrusion.

chickenwoman

Power resurrect seems to only work in relative mode. There's a hidden setting in Cura under special modes to enable relative extrusion that I used. Everything works great with this setup. There's no need to have M83 in the startup script or the config file.

I went back to try absolute mode. Put M82 in the config file. Had Cura set to absolute. After power fail M82 was written into the resurrect file but the same issue of the continuous extruder run happened.

dc42

@chickenwoman said in Resurrect extruding failure:

Power resurrect seems to only work in relative mode. There's a hidden setting in Cura under special modes to enable relative extrusion that I used. Everything works great with this setup. There's no need to have M83 in the startup script or the config file.

I went back to try absolute mode. Put M82 in the config file. Had Cura set to absolute. After power fail M82 was written into the resurrect file but the same issue of the continuous extruder run happened.

Thanks, I found the problem. The G92 E command sets up the virtual extruder position, but then it gets cleared when the print is resumed. I'll fix that in the next build, and add it as a known issue in 2.04 and 3.0beta12.

dc42

Update:

The fix will be in the next RRF3 build
Workaround for RRF 2.04 (does not work in RRF3): If you need to resurrect a print that has been sliced using absolute extrusion, then edit the resurrect.g file to move the G92 E command later in the file, after the M23 and M26 commands.

chickenwoman

@dc42 Thanks, I'm glad I helped find a bug.