Monotonic Line Fill creates alot of gcode and can overwhelm pressure advance

[LamarcLS]

Is there an existing issue for this problem?

• I have searched the existing issues

OrcaSlicer Version

2.2

Operating System (OS)

Windows

OS Version

10

Additional system information

amd 5950x, rtx3070

Printer

elegoo neptune 4

How to reproduce

slice anything with top-layer fill "monotonic line". "Travel distance threshold" should be 0 in filament and printer/extruder.

orca will generate a travel path including retract, zhop, deretract to the next line which is fraction of a millimiter away. It will also cause the printer to try to reach travel speed which is impossible.

Actual results

In the result this can lead to underextrusion only for toplayers because of the shear amount of retracts that are very short burst. I think it might be overwhelming the PA algorithm since its a time and speed based Parameter. May also cause extruder skips potentially.

Expected results

Monotonic line should never have actual deretract moving from one line to another. This was OK up until orca 1.9.1. NOK since 2.0 which brought.
Expected would be that the travel moves that are part of the "mono line" pattern are done without retracts and with top layer speed as it was in 1.9.1.

Project file & Debug log uploads

utf.zip

Checklist of files to include

• Log file
• Project file

Anything else?