Flow adjustment and height adjustment

I would like to have the option to change the filament flow rate during the print, and to change the nozzle height during the first layer specifically for the P1P

As far as z height for first layer. You can change layer height for first layer in Bambu Studio. Under quality setting, you can set first layer height and first layer line width. If your trying to get more or less squish into the bed, these settings will accomplish this. You can also lower the Elephants Foot compensation setting, also under the “quality” settings.

If you want to adjust flow rate, I believe the SoftFever fork of Bambu Studio, on github, offers some setting adjustment. Maybe someone else can chime in about this?

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Thank you Bird, I would like to change the flow rate or print bed height when the printer is printing. The P1P is not as smart as the X range, to avoid having to stop the print and change the printer settings in the slicer it would be great to do this on the fly.

Alright, I’m not sure you’re going to find that setting. Can I ask why you would want to do that during mid print? Is there a benefit?

The firfst layer height is different from what @Venom was asking. Z Offset can not be amended or changed during print. If you want to add more sqish onto the plate you need to amend the StartCode like this (which I have extracted from the amended StartCode available with printables.

;===== for Textured PEI Plate, High Temp Plate and Wham Bam Plate ===============
{if curr_bed_type==“Textured PEI Plate”}
G29.1 Z-0.04 ;squish of -0.02mm for Textured PEI Plate
{elsif curr_bed_type==“High Temp Plate”}
G29.1 Z0.03 ;raise of 0.03mm for High Temp or Wham Bam Plate

With this there will be 0.04 lower offset i.e. more squish, when using the textured plate. Likewise 0.03 higher offset when using the high temp plate. On the fly change not poissible

Flow rate, same thing, nada.

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I figured since they were asking about nozzle height during first layer, it was referring to better adhesion. In the Bambu wiki, they recommend the same settings that I was referring to, for better adhesion. Wouldn’t setting first layer height to .12 vs .25mm be considered changing layer height? Nevertheless, whatever works.

The SoftFever fork allows you to change the flow ratio for the top and/or bottom layers. You can also add a Modifier part and adjust flow ratio within that part. There is no while-printing adjustment of flow ratio (I have not seen that on my other printers.)

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Some people can’t seem to shake off the tradition of arcane fiddling about with 3D printers.

There is an argument that for textured PEI plates the printer will home Z at the top of the texture and the actual nozzle home position should be half the depth of the texture lower and that is a fixed amount. Otherwise the printer homes Z very accurately and I see zero point fiddling around with Z heights during a print.

When I do a softfever fork second pass flowrate calibration print with 10 tabs each 1% flow rate apart I pore over the result. Sometimes with a stereo microscope. I run my fingernail across the surface feeling for smoothness and I still struggle to choose between the best 3 or 4 tabs. I don’t buy that people can accurately calibrate flow by looking at a bit of brim or something while it is printing.

edit: Just checked and the stock start g-code already does offset Z by -0.04mm when using the textured PEI plate.


Everyone has their way of doing things, I would however like to be able to adjust the nozzle closer to the print bed when the print starts should I see that the print is not binding properly with the bed plate. This will save me time of setting things up again in the slicer and going through the 10 minute startup ritchual with the printer.


I have to agree with this . The calibration flow print from orca slicer is difficult to narrow down. I’ve also looked at them under a microscope and scruggled to pick the “optimal” result.