After Upgrading to new Firmware, every Print starts with calibration noise, i’ve tried to set it to factory default, but nothing helps, noise isn’ gone,
what can i do ?
Yes, noticed this with my P1S since latest firmware upgrade. Printer does short noisy resonant frequency test (Input Shaping) before each print. Is this really necessary before every print?
Yeah, thats really unnecessary … If you start your print in the middle of the night, the whole house is awake 
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Yes thats right,
may be that BBL thinks this is necessary to ensure print quality, but the volume is too high, I can’t start printing early in the morning or later in the evening because the noise is too loud
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I’ve looked everywhere, but unfortunately I haven’t found a way to disable this feature yet. 
I believe you are looking for the section of the Machine start G-code labelled “mech mode fast check”. Commenting these lines may stop the check and the noise, but I have no idea what other consequences might result. Your print, your printer, your risk.
;===== mech mode fast check============================
G1 X128 Y128 Z10 F20000
M400 P200
M970.3 Q1 A7 B30 C80 H15 K0
M974 Q1 S2 P0
G1 X128 Y128 Z10 F20000
M400 P200
M970.3 Q0 A7 B30 C90 Q0 H15 K0
M974 Q0 S2 P0
M975 S1
G1 F30000
G1 X230 Y15
G28 X ; re-home XY
;===== fmech mode fast check============================
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Thanks I’m afraid only BBL can change this directly in the firmware
The amount of noice is way beyond what I’d like to hear. Please provide official fix for this.
This is incredibly annoying, how does one raise a ticket as someone said above, a night time print is impossible now!
It worries me how we’re at the mercy of corporate and their ‘quality control’
I have opened a support ticket
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So with the help of ChatGPT I did the following changes:
;===== mech mode fast check============================
; G1 X128 Y128 Z10 F20000
; M400 P200
; M970.3 Q1 A7 B30 C80 H15 K0
; M974 Q1 S2 P0
; G1 X128 Y128 Z10 F20000
; M400 P200
; M970.3 Q0 A7 B30 C90 Q0 H15 K0
; M974 Q0 S2 P0
M975 S1 ; Enable previously stored resonance compensation
G1 F30000
G1 X230 Y15
G28 X ; re-home XY
;===== fmech mode fast check============================
(You edit the printer and go into Machine G-code | Machine start G-code. Copy it into a proper editor for better editing experience)
The four last command are important to keep.
This worked and my printer works absolutely fine so far. They probably have added that because it’s the standard configuration to put the AMS on top and this definitively affects the input shaping if you add/remove spools. Would explain the reports that you should not put a drawer or something below the AMS if you put it on top of the printer (reports of messed up quality).
I am not affected though, because my AMS is behind the printer due to how my enclosure (originally for the SV06+) is set up and the printer is on its own sitting on a concrete slab on foam.
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gcode worked, thanks!
I don’t think I’ve had any problems so far. it prints as usual, but without that monstrous sound.