Script for setting K factor depending on filament_type and nozzle_diameter
Hi, I#m using prusaslicer for my selfmade dual extrusion CoreXY printer since years now.
Currently I#m trying to setup the linear advanced K factor in the printer settings, user defined start G-Code.
During some tests with LA, its k-factor depends on nozzle size and filament type. So I found no simple setting location to put his conditional K-factor.
A script should be able to solve this, but couldn't get it to work:
{If (filament_type[current_extruder] == "PET" || filament_type[current_extruder] == "PLA") then
If nozzle_diameter[current_extruder] == 0.4 then
M900 K0.05 T[current_extruder]
Endif
If nozzle_diameter[current_extruder] == 0.6 then
M900 K0.025 T[current_extruder]
Endif
Elsif (filament_type[current_extruder] == "TPU" then
M900 K1 T[current_extruder]
Else
M900 K0 T[current_extruder] ; Unknown filament type, disable Linear Advance
Endif}
Found this more readable nested if notation in https://github.com/prusa3d/PrusaSlicer/wiki/PrusaSlicer-Macro-Language
Tried also with the earlier version with {} around all if, elif, endif.
So my first question is an example for a nested if condition.
My second question refers to the parameter nozzle_diameter. It seems not to work in a simple condition like
{If nozzle_diameter[current_extruder] == 0.4}
Would be happy about some hints how to solve this.
Many thanks, Scottty
RE:
Prusa Adds the K factor into their filament profiles.
For example this is from the Prusament PLA filament profiles Custom Gcode field
M900 K{if printer_notes=~/.*PRINTER_MODEL_MINI.*/ and nozzle_diameter[0]==0.6}0.12{elsif printer_notes=~/.*PRINTER_MODEL_MINI.*/ and nozzle_diameter[0]==0.8}0.06{elsif printer_notes=~/.*PRINTER_MODEL_MINI.*/}0.2{elsif nozzle_diameter[0]==0.8}0.01{elsif nozzle_diameter[0]==0.6}0.04{else}0.05{endif} ; Filament gcode LA 1.5
{if printer_notes=~/.*PRINTER_MODEL_MINI.*/};{elsif printer_notes=~/.*PRINTER_HAS_BOWDEN.*/}M900 K200{elsif nozzle_diameter[0]==0.6}M900 K18{elsif nozzle_diameter[0]==0.8};{else}M900 K30{endif} ; Filament gcode LA 1.0
{if printer_notes=~/.*PRINTER_MODEL_MINIIS.*/}
M572 S{if nozzle_diameter[0]==0.6}0.17{elsif nozzle_diameter[0]==0.8}0.12{elsif nozzle_diameter[0]==0.4}0.3{elsif nozzle_diameter[0]==0.25}0.85{else}0{endif}
{endif}
You cant use things like current extruder in there I think. The placeholders and where they can be used is listed here https://help.prusa3d.com/article/list-of-placeholders_205643
RE: Script for setting K factor depending on filament_type and nozzle_diameter
Thank you, Neophyl,
that helped me to find the solution. 🤩
I placed the the script in the printer setting and used the filament_type. It may be less precise, but this should do it.
And in printer settings I have to add the script lines only once. 😉
{if (filament_type[current_extruder] == "PET")}
M900 K{if nozzle_diameter[current_extruder]==0.8}0.01{elsif nozzle_diameter[current_extruder]==0.6}0.025{elsif nozzle_diameter[current_extruder]==0.4}0.05{elsif nozzle_diameter[current_extruder]==0.3}0.1{else}0.05{endif} T[current_extruder]
{elsif (filament_type[current_extruder] == "PLA")}
M900 K{if nozzle_diameter[current_extruder]==0.8}0.01{elsif nozzle_diameter[current_extruder]==0.6}0.025{elsif nozzle_diameter[current_extruder]==0.4}0.05{elsif nozzle_diameter[current_extruder]==0.3}0.1{else}0.05{endif} T[current_extruder]
{elsif (filament_type[current_extruder] == "FLEX")}
M900 K1 T[current_extruder]
{else}
M900 K0 T[current_extruder] ; Linear Advance disabled
{endif}
Thanks ans best regards, Scottty