How to move head of P1S to a certain position with a specific speed?

Bambu Lab P1 Series Troubleshooting
1

My Bambu Lab P1S makes a scratching noise during printing. Doing some research, I found that it could be one of the idler pulleys.

However, I cannot replicate the noise without printing. Moving the printhead using Bambu Handy / Studio / Screen is far too slow and I can only do it in steps, which is not enough to replicate the problem.

On a classic 3D printer, I can just set a speed to move the head a certain distance using G-Code sent via octoprint. Can I do something similar on my P1S to help me diagnose the problem?

Thanks!

2

You might try turning off the power and moving the belts by hand.

3

Is it a scratching noise while printing infill perhaps? Crossing infill like Grid will have a scratching noise as the nozzle impacts the print at the cross over points. If you change the print to use gyroid infill does the noise go away?

4

If the issue isn’t the infill pattern and you still want to test as you have requested I would suggest manually editing the Manual tramming gcode file found here. Load the file on to the SD card and run it.

1 Like
5

Navigate to IDLER PULLEY section

Note: Do NOT lube the belt, slippery belt can cause step skipping

6

I tried that, but unfortunately, it is not fast enough to replicate the noise due to the motor drag.

7

The noise also comes up during bed leveling when moving fast between points. I’ll try your suggestion with the code file, thanks! A bit disappointed that I can’t just send GCODE like with my other printers, but that’s the downside of a closed system like this.

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