Movement to the right and back edge before printing

[loewilein]

Cura Version

5.71

Operating System

windows 11

Printer

LNL3D D3/ Tenlog D3Pro

Reproduction steps

Movement to the right and back edge before printing
happens on all parts, sliced with cura 5.71
this is the problem:
;LAYER_COUNT:98
M900 K0.050000 T0 ;added by LinearAdvanceSettingPlugin
;LAYER:0
M107 P1
G0 X21.875 Y6.145 Z0.3
;TYPE:SKIRT

The problen occures since i installed Cura5.71. No problems with cura 5.5. I used the same printer settings in 5.71 .

Actual results

No steps to do, becaus it works on older cura versions

Expected results

Cura should not generate tge G0 F4800 X294.575 Y274.575 code

Add your .zip and screenshots here ⬇️

cura.zip
Screenshots.zip

[GregValiant]

Thanks for the report.
It appears that even with the Prime Tower disabled that the first move is going to the Prime Tower location. That does not happen with my Ender configured to dual extruders.

For a fix right now, enable the Prime Tower and change the Prime Tower Location to X25 Y25. That will shortstop the move across the build plate. You can then disable the Prime Tower.
Here is the errant move from 0,0 to the prime tower.

@HellAholic here is a project file of this one. I can't duplicate it with my printer and I didn't see anything in the LNL definition files.
GV 19156.zip

[HellAholic]

Hey @GregValiant thanks for the heads up.
Some context: The move was added as a way to limit the scaring after the extruder is primed so it goes to the location for nozzle switch (or prime tower in this case) and then starts the extrusion at the point closest to the nozzle switch/ prime tower point.
The problem here:
I can see two issues as part of the same behavior, 1 is the fact that the move is happening to that area where the prime tower is supposed to be even when the prime tower is disabled, 2 is the traveling back through the model area to start the skirt in bottom left rather than top right. I'll add a ticket for investigation.

[GregValiant]

@HellAholic funny you should mention that move. I scribbled up a post processor for myself that creates a toolpath for the nozzle to move around the periphery of the bed so it gets to the layer start without crossing the print area.
It ended up at 60 lines because of rectangular beds, and rectangular beds with the origin at center, and the G2 G3 moves for elliptical beds, . It wasn't as simple as I thought it would be.

I have to admit that It never really occurred to me to have the path cross the print area twice.

[HellAholic]

Added a ticket for investigation, internal reference: CURA-11937

Side notes for Greg :P
We also have a ticket for the combing in initial move, but as you figured it is very tricky with different printers and build plate shapes and prime positions, initial printing position. the heat up nozzle position, etc. The initial move (simplified version) was aimed to address the issue in the pictures below, for materials such as TPU which are very oozy :) By adding an extra travel move, it keeps out the extra material outside the print area.

Issue:

Minor fix by traveling to top right ( initial printing position)/switch position/prime tower position (in "most" cases)

[loewilein]

Thansk for all your help, it works fine now

[MariMakes]

👋 Quick update on our side.
This is resolved in the 5.8 release 🎉 , you can download the Beta version with the fix here: https://github.com/Ultimaker/Cura/releases/tag/5.8.0-beta.1

I'll close this issue since it's resolved.
Thanks again, and please let us know if you run into any other issues 💪