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Layer Change Travel Issue
Open, Needs TriagePublic

Description

There are travel moves being generated when the nozzles switch occurs and it is specific to which nozzle is used on the 1st layer of the model.

Bellow are some visual examples of the issue I am having.


These show a model with the entire bottom layer only using T0's color for the part and T1 only prints a skirt .
TRAVEL SETTINGS: Layer Start X=0; Layer Start Y=0



GCODE SNIP:
G1 F2100 X143.272 Y159.015 E630.09737
G1 F600 E629.09737
G1 F180 Z4.06
;MESH:NONMESH
G0 F10200 X0.00 Y0.00 Z4.06
;TIME_ELAPSED:1417.708962
;LAYER:8
M425 F0.0
G1 F600 E620.09737
G1 F180 Z4.44
G92 E0
T0
G92 E0
M105
M109 S255
M104 T1 S170
;MESH:
G0 F10200 X0.00 Y0.00 Z4.44
G1 F600 E9
G0 F10200 X0.00 Y10
G0 X132.279 Y127.571
;TYPE:WALL-INNER
G1 F180 Z3.44
G1 F600 E10
G1 F1800 X133.741 Y126.623 E10.0519
G1 X135.023 Y126.008 E10.09424

TRAVEL SETTINGS: Layer Start X=100; Layer Start Y=100



GCODE SNIP:
G1 F2100 X143.272 Y159.015 E630.09737
G1 F600 E629.09737
G1 F180 Z4.06
;MESH:NONMESH
G0 F10200 X100 Y100 Z4.06
;TIME_ELAPSED:1416.880400
;LAYER:8
M425 F0.0
G1 F600 E620.09737
G1 F180 Z4.44
G92 E0
T0
G92 E0
M105
M109 S255
M104 T1 S170
;MESH:
G0 F10200 X100 Y100 Z4.44
G1 F600 E9
G0 F10200 X100 Y110
G0 X132.279 Y127.571
;TYPE:WALL-INNER
G1 F180 Z3.44
G1 F600 E10
G1 F1800 X133.741 Y126.623 E10.0519
G1 X135.023 Y126.008 E10.09424


These show a model that uses T1 for the entire 1st layer, T0 only prints a skirt.
TRAVEL SETTINGS: Layer Start X=0; Layer Start Y=0



GCODE SNIP:
G1 X166.019 Y129.382 E11.08189
G1 F600 E10.08189
G1 F180 Z1.4
G0 F3000 X0.00 Y0.00 Z1.4
;TIME_ELAPSED:376.699835
;LAYER:1
M425 F0.22
M140 S80
G1 F600 E1.08189
G1 F180 Z1.78
G92 E0
T0
G92 E0
M105
M109 S255
M104 T1 S170
M106 S6.4
;MESH:
G0 F6600 X0.00 Y0.00 Z1.78
G1 F600 E9
G0 F6600 X0.00 Y10
G0 X152.22 Y139.934
;TYPE:WALL-INNER
G1 F180 Z0.78
G1 F600 E10
G1 F1200 X152.233 Y139.998 E10.00195
G1 X151.928 Y141.54 E10.04876

TRAVEL SETTINGS: Layer Start X=100; Layer Start Y=100



GCODE SNIP:
G1 X166.019 Y129.382 E11.08189
G1 F600 E10.08189
G1 F180 Z1.4
G0 F3000 X100 Y100 Z1.4
;TIME_ELAPSED:373.935559
;LAYER:1
M425 F0.22
M140 S80
G1 F600 E1.08189
G1 F180 Z1.78
G92 E0
T0
G92 E0
M105
M109 S255
M104 T1 S170
M106 S6.4
;MESH:
G0 F6600 X100 Y100 Z1.78
G1 F600 E9
G0 F6600 X100 Y110
G0 X144.062 Y149.283
;TYPE:WALL-INNER
G1 F180 Z0.78
G1 F600 E10
G1 F1200 X144.609 Y149.066 E10.01753
G1 X144.824 Y148.964 E10.02461


These show a model that has T0 AND T1 printing a skirt AND part of the model on Layer 1.
TRAVEL SETTINGS: Layer Start X=0; Layer Start Y=0



GCODE SNIP: (NO TRAVEL MOVE, COMPARISON SNIP OF LAYER 1)
G1 F600 X140.835 Y150.027 E36.03029
G1 F600 E35.03029
G1 F180 Z1.4
;MESH:NONMESH
G0 F3000 X152.22 Y139.934 Z1.4
;TIME_ELAPSED:372.657268
;LAYER:1
M425 F0.22
M140 S80
M106 S6.4
;MESH:
G0 F6600 X152.22 Y139.934 Z1.78
;TYPE:WALL-INNER
G1 F180 Z0.78
G1 F600 E36.03029
G1 F1200 X152.233 Y139.998 E36.03224
G1 X151.928 Y141.54 E36.07905

GCODE SNIP: (NO TRAVEL MOVE, COMPARISON SNIP OF LAYER 8)
G1 F2100 X143.272 Y159.015 E65.17412
G1 F600 E64.17412
G1 F180 Z4.06
;MESH:NONMESH
G0 F10200 X132.279 Y127.571 Z4.06
;TIME_ELAPSED:1431.020841
;LAYER:8
M425 F0.0
;MESH:
G0 X132.279 Y127.571 Z4.44
;TYPE:WALL-INNER
G1 F180 Z3.44
G1 F600 E65.17412
G1 F1800 X133.741 Y126.623 E65.22601
G1 X135.023 Y126.008 E65.26836

TRAVEL SETTINGS: Layer Start X=100; Layer Start Y=100



GCODE SNIP: (NO TRAVEL MOVE, COMPARISON SNIP OF LAYER 1)
G1 F600 X140.835 Y150.027 E36.03029
G1 F600 E35.03029
G1 F180 Z1.4
;MESH:NONMESH
G0 F3000 X152.22 Y139.934 Z1.4
;TIME_ELAPSED:372.657268
;LAYER:1
M425 F0.22
M140 S80
M106 S6.4
;MESH:
G0 F6600 X152.22 Y139.934 Z1.78
;TYPE:WALL-INNER
G1 F180 Z0.78
G1 F600 E36.03029
G1 F1200 X152.233 Y139.998 E36.03224
G1 X151.928 Y141.54 E36.07905

GCODE SNIP: (NO TRAVEL MOVE, COMPARISON SNIP OF LAYER 8)
G1 F2100 X143.272 Y159.015 E65.17412
G1 F600 E64.17412
G1 F180 Z4.06
;MESH:NONMESH
G0 F10200 X132.279 Y127.571 Z4.06
;TIME_ELAPSED:1431.020841
;LAYER:8
M425 F0.0
;MESH:
G0 X132.279 Y127.571 Z4.44
;TYPE:WALL-INNER
G1 F180 Z3.44
G1 F600 E65.17412
G1 F1800 X133.741 Y126.623 E65.22601
G1 X135.023 Y126.008 E65.26836

Event Timeline

anolen created this task.Tue, Jan 29, 3:00 PM
karrad moved this task from Backlog to Next Release (3.6) on the Cura LulzBot Edition board.

We are trying to get more information on this one. We want to eliminate the extra travel move to that front right corner. It looks like it could be causes when we do not use both extruders in a single layer. Please look into this, and if there is any other information you need we are willing to try whatever you think can help.

anolen updated the task description. (Show Details)Tue, Jan 29, 3:52 PM
anolen updated the task description. (Show Details)
anolen updated the task description. (Show Details)Tue, Jan 29, 4:26 PM
alexei changed the edit policy from "All Users" to "Cura LulzBot Edition (Project)".Wed, Jan 30, 7:53 AM

T5471 is a different issue from what is reported in this ticket. Scaling the model from T5471 to 2 layers shows none of these issues.
Please re-open T5471

jebba added a subscriber: jebba.Tue, Feb 5, 1:00 PM

T5471 appears to be a non-bug, as it is rendering actual travels that are in the gcode.

jebba added a comment.Tue, Feb 5, 1:05 PM

The main issue for this T5564 is that there are some extra travels generated? So it takes a bit longer on the first layer than it should? I'm trying to nail down what the issue is here.

@karrad, I see scenario in engine code when this issue may happen, but can't test it, because it don't happen on my pc with dev cura and 3.6.4. Can you please post model files, settings, and instructions to replicate this issue, so I can debug it.

@anolen Can you post the files and steps to duplicate this?