Prusaslicer deleting custom gcode after slicing?  

It's a lot easier to dry the filament first.

Cheerio,

RE:

I tried, I stuffed it in a modded food dehydrator for 12+ hours with silica beads at ~40⁰ to not ruin it and it was still garbage after. It's white filament which causes lots of crappy things to happen I guess. I'd rather be able to change my gcode if need arises too.

RE: Prusaslicer deleting custom gcode after slicing?

Make sure to save the preset for the printer, or make a new one and select it prior slicing. I had this issue with end layer and end of print, but haven't tried with start of print.

If this is still an issue then report it as big on GitHub page of the PrusaSlicer.

RE: Prusaslicer deleting custom gcode after slicing?

• Thank you, because it's driving me crazy, I'm trying to print big stuff but I kinda REALLY am not interested in babysitting an hour long first layer just because the nozzle likes to accumulate boogers. I tried drying the filament, I cleaned the steel sheet with warm water and dishsoap + 99% isopropyl. 

I also sent an email straight to prusa about this hope it yields something. Especially since this method of preventing blobs is currently used on the mini+.

What size nozzle?  Which printer?

White filaments often behave oddly due to the high proportion of pigment in them - but excessive oozing isn't typical.

Cheerio,

RE: Prusaslicer deleting custom gcode after slicing?

It's a MK3S+  with a 0.4 nozzle x. It doesn't really ooze excessively it's just that the normal amount gets pushed back up by the mesh leveling (7x7) and sticks right back to the nozzle wether it's at 190⁰ or 215 it does it. The blobs often fails to get ripped by the purge line and most likely tears out the first layer at some point. And its helped by the abysmal adhesion of the filament. I must have done first layer cal 3-4 times. + live z

abysmal adhesion of the filament

??  Is it an issue with only this filament?  Which filament?

Cheerio,

RE: Prusaslicer deleting custom gcode after slicing?

It's econofil pla from filament.ca, their stuff is usually decent but those rolls of off white are particularly nasty. I bought 4kgs of the stuff unfortunately so I have to sunk cost fallacy it away. White is up there for that issue but it happens occasionally with other colors and brands. That's mostly why I would really like to have the heat dialed down on leveling and after that full blast.

RE: Prusaslicer deleting custom gcode after slicing?

If you post your startup gcode we can check what's going wrong. It's certainly possible to set the temp to 170 for bed leveling only, I do it in all my printer profiles (actually, I set it to 40 degrees lower than the regular temperature).

RE: Prusaslicer deleting custom gcode after slicing?

There you go, if I slice a file and drop it into notepad both m104 and m109 will be missing after g80 which makes the printer attempt to print at 170.

M862.3 P "[printer_model]" ; printer model check

M862.1 P[nozzle_diameter] ; nozzle diameter check

M115 U3.13.1 ; tell printer latest fw version

G90 ; use absolute coordinates

M83 ; extruder relative mode

M104 S170 ; set extruder temp for bed leveling

M140 S[first_layer_bed_temperature] ; set bed temp

M109 R170 ; wait for bed leveling temp

M190 S[first_layer_bed_temperature] ; wait for bed temp

G28 W ; home all without mesh bed level

G80 ; mesh bed leveling {if filament_settings_id[initial_tool]=~/.*Prusament PA11.*/}

M104 S[first_layer_temperature] ; set extruder temp

M109 S[first_layer_temperature] ; wait for extruder temp

G1 Z0.3 F720

G1 Y-3 F1000 ; go outside print area

G92 E0

G1 X60 E9 F1000 ; intro line

G1 X100 E9 F1000 ; intro line

{else}

G1 Z0.2 F720

G1 Y-3 F1000 ; go outside print area

G92 E0

G1 X60 E9 F1000 ; intro line

G1 X100 E12.5 F1000 ; intro line

{endif}

G92 E0

M221 S{if layer_height<0.075}100{else}95{endif}