Extrusion aborted due to Cura temp changes

[akn 0]

I have been going crazy trying to work out why my prints abort some way through. Turns out that Cura generated G-code is changing the extruder temp, up intiially then progrsssively down until the extruder is too cold, and then Octoprint aborts the print becuase of a cold extrusion error.

My temp setting for the print was 200C - however I noticed that after a while the temp was bumped to 220C

When I go look at the G-coide, I see the temp increased on an M104, then progressively dropped to 165 at which point extrusion is aborted (abouit 12 hours into the print in the last case)

I am running Cura 5.2.1 

Could I get an explanation please and a fix?

 

Here is the generated G-code

;Generated with Cura_SteamEngine 5.2.1
M140 S80
M105
M190 S80
M104 S200
M105
M109 S200
M82 ;absolute extrusion mode
[...]
;TIME_ELAPSED:1818.461895
;LAYER:5
M117 INDICATOR-Layer5
M117 DASHBOARD_LAYER_INDICATOR 6
;TYPE:CUSTOM LAYER
M104 S220
M106 S182.1
;TYPE:WALL-INNER
;MESH:Body1.stl
G1 F3600 X166.099 Y166.47 E2386.42539
G1 X165.721 Y166.458 E2386.43799
G1 X165.279 Y166.274 E2386.45394
[...]
;TIME_ELAPSED:8052.156295
;LAYER:57
M117 INDICATOR-Layer57
M117 DASHBOARD_LAYER_INDICATOR 58
;TYPE:CUSTOM TEMP
M104 S215
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:12019.145163
;LAYER:109
M117 INDICATOR-Layer109
M117 DASHBOARD_LAYER_INDICATOR 110
;TYPE:CUSTOM TEMP
M104 S210
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:16044.143848
;LAYER:161
M117 INDICATOR-Layer161
M117 DASHBOARD_LAYER_INDICATOR 162
;TYPE:CUSTOM TEMP
M104 S205
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:20240.928604
;LAYER:213
M117 INDICATOR-Layer213
M117 DASHBOARD_LAYER_INDICATOR 214
;TYPE:CUSTOM TEMP
M104 S200
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
G0 F12000 X271.477 Y280.601
;TIME_ELAPSED:24012.535417
;LAYER:265
M117 INDICATOR-Layer265
M117 DASHBOARD_LAYER_INDICATOR 266
;TYPE:CUSTOM TEMP
M104 S195
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:27812.638552
;LAYER:317
M117 INDICATOR-Layer317
M117 DASHBOARD_LAYER_INDICATOR 318
;TYPE:CUSTOM TEMP
M104 S190
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:31689.972488
;LAYER:369
M117 INDICATOR-Layer369
M117 DASHBOARD_LAYER_INDICATOR 370
;TYPE:CUSTOM TEMP
M104 S185
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:35551.093250
;LAYER:421
M117 INDICATOR-Layer421
M117 DASHBOARD_LAYER_INDICATOR 422
;TYPE:CUSTOM TEMP
M104 S180
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:39279.711465
;LAYER:473
M117 INDICATOR-Layer473
M117 DASHBOARD_LAYER_INDICATOR 474
;TYPE:CUSTOM TEMP
M104 S175
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:43002.588193
;LAYER:525
M117 INDICATOR-Layer525
M117 DASHBOARD_LAYER_INDICATOR 526
;TYPE:CUSTOM TEMP
M104 S170
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:46728.453429
;LAYER:577
M117 INDICATOR-Layer577
M117 DASHBOARD_LAYER_INDICATOR 578
;TYPE:CUSTOM TEMP
M104 S165
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:50518.783004
;LAYER:629
M117 INDICATOR-Layer629
M117 DASHBOARD_LAYER_INDICATOR 630
;TYPE:CUSTOM TEMP
M104 S160
;TYPE:WALL-INNER
;MESH:Body1.stl
[...]
;TIME_ELAPSED:54795.788831
;LAYER:681
M117 INDICATOR-Layer681
M117 DASHBOARD_LAYER_INDICATOR 682
;TYPE:CUSTOM TEMP
M104 S155
;TYPE:WALL-INNER
;MESH:Body1.stl
 

[Mcudnic 0]

go to material and then click the up top left box ,and check those boxes  initial temp and so on. Then you have control over everything. Because the are occasions you need to tweak them. Ran into the same issue! I cannot take pics of this.if you check the boxes it will show the next time you on the the material settings menu

Edited February 13, 2023 by Mcudnic

[GregValiant 1,330]

You have at least two post processors running.  Did you print a temp tower recently?

Cura does not directly add the lines in bold below.  They are from at least one post-processor.  Since the second M117 line immediately erases the first M117 from the LCD screen I'm guessing at least two post processors.  The temperature lines may be from a third and the fan line might be from a fourth.

Are you using OctoPrint?

M117 INDICATOR-Layer5
M117 DASHBOARD_LAYER_INDICATOR 6
;TYPE:CUSTOM LAYER
M104 S220
M106 S182.1
;TYPE:WALL-INNER
;MESH:Body1.stl

Edited February 13, 2023 by GregValiant