Move exceeds maximum extrusion (2.673mm^2 vs 0.640mm^2)

Trying to print some basic stuff and getting the following message: Move exceeds maximum extrusion (2.673mm^2 vs 0.640mm^2). Nozzle in slicer is 0.4 as well as in RatOS.cfg file. The print stops during prime blob, so i think it is not related to sliced file. Any help are more then welcome
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10 Replies
Steppe_Warrior
Steppe_WarriorOP4mo ago
in order to make it print i have to use max_extrude_cross_section = 9999 in my config This is RatOS 2.1 on RatRig 3.1 300mm
TheTik
TheTik4mo ago
Are you using relative or absolute extrusion?
Steppe_Warrior
Steppe_WarriorOP4mo ago
I am using Start G-Code and all instructions as per RatOS instruction page. Nothing else
Steppe_Warrior
Steppe_WarriorOP4mo ago
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Steppe_Warrior
Steppe_WarriorOP4mo ago
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miklschmidt
miklschmidt4mo ago
In 2.0 you need to set variable_relative_extrusion to True in the [gcode_macro RatOS] section for relative extrusion to work. You can either do that in your printer.cfg or you can do it via gcode before START_PRINT in your slicer like so:
SET_GCODE_VARIABLE MACRO="RatOS" VARIABLE="relative_extrusion" VALUE="True"
SET_GCODE_VARIABLE MACRO="RatOS" VARIABLE="relative_extrusion" VALUE="True"
this is for RatOS 2.1 in which case relative extrusion should be the default (EDIT: i thought i made this change, but apparently i didn't - it's only True by default on IDEX printers (VC3.1 IDEX and VC4 IDEX), because wipe towers don't work in absolute mode). What nozzle size are you using and did you set it correctly in the RatOS configurator on the hardware page?
Nozzle in slicer is 0.4 as well as in RatOS.cfg file
Ah, it's already answered here. You still need
SET_GCODE_VARIABLE MACRO="RatOS" VARIABLE="relative_extrusion" VALUE="True"
SET_GCODE_VARIABLE MACRO="RatOS" VARIABLE="relative_extrusion" VALUE="True"
In 2.1
Steppe_Warrior
Steppe_WarriorOP4mo ago
I will try this, thank you for a hint!
ptegler
ptegler3mo ago
just ran across this as well... 10 minutes ago...the configurator is still defaulting the relative to false. (in the suggested printer.cfg changes you can opt in/out of) so came looking and found this thread. So...as previous... relative is best set to TRUE, correct? tia
miklschmidt
miklschmidt3mo ago
It doesn't make a noticeable difference honestly. But PS only supports wipe towers with relative extrusion, for reasons..

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