Plate not lowering all the way?

Bambu Lab P Series Troubleshooting
1

Hello! I have a P1S, using Bambu’s slicer. I’m trying to print some models that are just below the 256mm limit height-wise.

However, it seems like about around the 240mm mark, the bed stops being able to lower. There’s a frustrated sound from the motor, and the nozzle just starts embedding itself into the print.

Has anyone has this issue? I’ve done a full maintenance cycle on the printer, cleaned everything I can see, lubed everything up, did a calibration, etc. But this issue persists.

When it gets to the lowest point and starts making the noise, there’s about 1cm visible of the lead screw beneath the plate. How much is visible on your printer when the bed is lowered to the lowest point?

My 11yo’s halloween costume hangs in the balance!

2

Using the full height requires changing the printer preset, specifically to increase height and adjust z-hop retraction settings.

If you are not printing in the front left corner you should be able to leave the exclusion zone as-is, and still use an AMS.

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3

try manually pushing the bed down past the stuck point

4

Trying this out now!! I have never come across this before!

5

Ok so I tried the following settings (only need the Z height so left the Bed exclude area alone)

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It had the same issue, didn’t seem to make any difference at all at the end! I thought for sure this would do it!

6

Trying now in Orca slicer to see if I get any different results. However - I also realized that in fact the model only goes up to 250, not 256, so this seems like it’s not actually the issue. Hmmmm

7

Figured it out! Took off the back and found the smoking gun

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Looks like I lost a hotend screw back there at some point…

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