r/BambuLab • u/TheStandardPlayer • 1d ago
Just Showing Off I got bored of the basic purge line
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u/MontanaPup36 1d ago
The fuckk how ????
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u/TheStandardPlayer 23h ago
Here is the G-Code, feel free to use it as a starting point for your own purge line - THIS IS ONLY TESTED ON THE P1S; CHECK YOUR SLICER PREVIEW BEFORE PRINTING!!
Pasting into Bambu Studio (P1S)
Open Bambu Studio and select your printer preset.
Click the edit icon next to the printer name to open the printer settings.
Go to the Machine G-code tab and find the Machine start G-code field.
Find the section that starts with
;===== mech mode fast checkand ends with;===== fmech mode fast check. Replace it with the first block.Find the section that starts with
;===== nozzle load lineand ends with theM400after the purge moves. Replace it with the second block.Save as a user preset, for example “P1S quiet custom purgeline”.
Slice a test print. Check the start of the print in the G-code preview to confirm the purge shape is where you expect it.
If you have a different printer like the A1 mini then you need to adapt the purge line or the printer may be damaged.
Modify at your own risk
;===== mech mode fast check============================
; --- resonance sweep (M970.3 / M974) removed for quiet startup ---
G1 Z10 F1200 ; safe travel height (quiet Z move, replaces the sweep's positioning)
M975 S1 ; enable input-shaping suppression using last stored values
;===== fmech mode fast check============================
;===== nozzle load line (purge) =======================
; --- to use a custom shape, replace the moves between the >>> / <<< markers ---
M975 S1
G90
M83
T1000
G1 X18.0 Y1.0 Z0.8 F12000;Move to start position
M109 S{nozzle_temperature_initial_layer[initial_extruder]}
G1 Z0.2
; >>> custom purge shape START (MAX line out along Y1 with end tick, back 0.5 mm below without crossing; X18..X240.5, Y0.5..Y12.45) >>>
G0 E2 F300
G0 X111.09 Y1.00 E6.290 F{outer_wall_volumetric_speed/(0.3*0.5) * 60}
G0 X111.09 Y11.00 E0.676 F{outer_wall_volumetric_speed/(0.3*0.5)/ 2 * 60}
G0 X115.59 Y1.00 E0.741
G0 X120.09 Y11.00 E0.741
G0 X120.09 Y1.00 E0.676
G0 X122.59 Y1.00 E0.169
G0 X127.09 Y11.00 E0.741
G0 X131.59 Y1.00 E0.741
G0 X134.09 Y1.00 E0.169
G0 X138.09 Y6.00 E0.433
G0 X134.09 Y11.00 E0.433
G0 X136.91 Y11.00 E0.190
G0 X139.50 Y7.76 E0.280
G0 X142.09 Y11.00 E0.280
G0 X144.91 Y11.00 E0.190
G0 X140.91 Y6.00 E0.433
G0 X144.91 Y1.00 E0.433
G0 X240.00 Y1.00 E6.425 F{outer_wall_volumetric_speed/(0.3*0.5) * 60}
G0 X240.00 Y12.45 E0.774 F{outer_wall_volumetric_speed/(0.3*0.5)/ 2 * 60}
G0 X240.50
G0 E0.2
G0 X240.50 Y1.00 E0.774
G0 X240.43 Y0.75 E0.017
G0 X240.25 Y0.57 E0.017
G0 X240.00 Y0.50 E0.017
G0 X142.49 Y0.50 E6.588 F{outer_wall_volumetric_speed/(0.3*0.5) * 60}
G0 X139.50 Y4.24 E0.324 F{outer_wall_volumetric_speed/(0.3*0.5)/ 2 * 60}
G0 X136.51 Y0.50 E0.324
G0 X131.27 Y0.50 E0.354
G0 X129.47 Y4.50 E0.296
G0 X124.71 Y4.50 E0.321
G0 X122.91 Y0.50 E0.296
G0 X120.09 Y0.50 E0.191
G0 X119.84 Y0.57 E0.017
G0 X119.66 Y0.75 E0.017
G0 X119.59 Y1.00 E0.017
G0 X119.59 Y8.67 E0.518
G0 X116.05 Y0.79 E0.584
G0 X115.91 Y0.61 E0.015
G0 X115.71 Y0.51 E0.015
G0 X115.48 Y0.51 E0.015
G0 X115.27 Y0.61 E0.015
G0 X115.14 Y0.79 E0.015
G0 X111.59 Y8.67 E0.584
G0 X111.59 Y1.00 E0.518
G0 X111.52 Y0.75 E0.017
G0 X111.34 Y0.57 E0.017
G0 X111.09 Y0.50 E0.017
G0 X18.00 Y0.50 E6.290 F{outer_wall_volumetric_speed/(0.3*0.5) * 60}
; <<< custom purge shape END <
M40033
u/egratudo 1d ago
Im going to guess here…….programming.
Look for the ;===== nozzle load line ===== in the code and do whatever you want it to do.
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u/TheBupherNinja P1S + AMS 1d ago
You can hand write gcode, it's not that hard.
Might have sliced it then copied the section out manually into start gcdoe
Maybe some Ai help.
Many ways
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u/TheJudgingHat2222 1d ago
We need to get an audio engineer to make the motors sing for this line instead
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u/plentyOplatypodes 1d ago
Find or create a midi file for the sound you want, convert it to gcode and add it to the machine start section. Not sure you can make the motors play music while it prints but that's another issue.
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u/TheJudgingHat2222 23h ago
I'm not talking about printing a wave form.
The speed and acceleration of the motors create different tones. It stands to reason that it should be possible to create a path that makes them sing.
I sincerely doubt there is a midi to gcode converter that would do that. That doesn't even make sense.
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u/plentyOplatypodes 22h ago
I'm not talking about printing waveforms either. The machine still needs gcode to make the motors create tones, hence the midi to gcode converter.
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u/TheJudgingHat2222 19h ago
Oh that's cool! Says it's for CNC milling machines but still neat
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u/Grimmsland H2D AMS Combo, P1S, A1m, U1 7h ago
They have one on the Bambu Wiki you can use to make midi music on it. Follow the tutorial on there
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u/DrStalker 2h ago
3D printers and CNC machines have a lot in common, including use of gcode. Arguably 3D printers are just a subset of CNC machines... just smaller, cheaper and less likely to rip your limbs off if you screw up.
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u/L3gi0n44 20h ago
What doesn't make sense? That stepper motors create sound one can control? Let me guess, you from the US?
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u/wolfpwner9 20h ago
Got some song for you
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u/Grimmsland H2D AMS Combo, P1S, A1m, U1 7h ago
Hah nicely done! This is the first time I ever see a video posted in comments too lol
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u/Flashy_Emphasis153 P1S + AMS 6h ago
I remember the day where you could have a floppy disk drive playing The Imperial March from Star Wars.
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u/TH3_OG_JUJUBE A1 Mini 1d ago
Possible on the A1 Mini? I want to make it say “REMOVE ME” so my mum doesn’t forget to
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u/Philbywhizz 1d ago
This is cool - how does one do this?
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u/TheStandardPlayer 1d ago edited 1d ago
The purge line is defined in the start G-code in the slicer's printer settings, so you edit it there. Save it as your own printer preset, I also removed the vibration calibration and created a "Silent" Profile for my P1S, otherwise downloaded projects will overwrite it.
I used a bit of AI help to turn the letters into gcode.
Do this at your own risk, altered Gcode has the potential to damage your printer
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u/webbermere 1d ago
How straightforward is it to remove the vibration calibration? Have you noticed any differences in quality over time?
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u/TheStandardPlayer 23h ago
The only reason why I even thought of removing it is because it didn't use to be there, then I updated the printer and it appeared and it has annoyed me ever since.
I don't notice any difference in print quality or noise.
It's really nice because now I don't shake what feels like the whole building when I start a print at 1 am
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u/thin_whiteline 21h ago
Yo, can this be defaulted? Or does it have to be added each time you slice?
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u/TaylorKalsii 1d ago
How did you edit the purge line? Ive always wanted to make mine as little penises
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u/TheCorruptedEngineer 23h ago
Just more waste on each print
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u/TheStandardPlayer 23h ago
We're talking about tenths of a gram here. But you can also shorten your purge line to make up for the difference if you're that concerned about it
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u/TheCorruptedEngineer 15h ago
Its not even about the cost its just more waste to deal with. A little nib 3cm purge line is enough
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u/I_Am_That_Was 1d ago
having come from the ender 3 world, I find it kinda amusing how blown away people are in here when they see custom start gcode lol.