Move exceeds maximum extrusion suddenly appears

General Discussion
1

Basic Information:

Printer Model: Prusa i3MK3S+
MCU / Printerboard: Einsy
Host / SBC: PRi 5

klippy_max_extrusion.zip (2.1 MB)

klippy.log

Fill out above information and in all cases attach your klippy.log file (use zip to compress it, if too big). Pasting your printer.cfg is not needed
Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there

Describe your issue:

I have never entered this problem. The printer was working fine this morning but all of a sudden, it keeps giving me this error messag:

Move exceeds maximum extrusion (83.260mm^2 vs 50.000mm^2)

Move exceeds maximum extrusion (83.260mm^2 vs 50.000mm^2)
See the ‘max_extrude_cross_section’ config option for details

Could you please let me know how to fix it? I am using Orca Slicer.

2

Hi @printeruser ,

From your klippy.log, the it looks like the error occurs a few seconds after bed meshing. Are you using any purging logic in your slicer or print start macro? Could you please upload the problematic G-code?

3

Thanks. I came across a post that this could be caused by switching from PLA to TPU. It has something to do with a mismatch between absolute and relative extrusion modes. I don’t remember exactly what I did. I think after I changed M82 to M83 in the start gcode in the slicer, the problem disappeared. This is a bit inconvenience as we need to change the gcode manually whenver we switch between PLA and TPU. Why printing in TPU caused a mismatch in absolute/relative distances for extrusion?

4

Hi @printeruser ,

There shouldn’t have been an M82 in the slicer’s start G-code from the start anyway. It should have been M83.

Are you referring to the printer’s Start G-code or the filament’s start g-code?