Vibration test on print start?

Bambu Lab H2D
1

Hi there,

I would like to understand about the H2D’s vibration test each time at start of a new print . Even if it is only a simple print job with the left nozzle, it activates the right nozzle, does this short vibration and change back to the required left nozzle.
Why is this?

Thanks and best regards

2

Hi

You can check it in detail in the printer start G-code.

;===== mech mode sweep start =====

What I always assumed that it does (not only H2D) is to:

  • Excite the frame or toolhead
  • Measure vibration response
  • Compare it to previous calibration
    If it denotes changes, it will likely prompt an alert.

So it verifies that the previous calibration is still valid.

Do you mean heat up? I don’t own the printer, just checking the g-code, that’s why I’m asking.

1 Like
3

thank you for your reply.
…mmh, what do you mean by heat up?
I wonder why the printer always activate the right nozzle, even if it is supposed to print with the left one only, do a short vibration and change back to the left nozzle if this is the one the job is to be done with.

4

I am sorry, but I can’t precisely explain why the printer does that, as I don’t have the printer, and the likely G-code related to that action is a custom one. At least I didn’t find it.
If I had to guess, the H2D start-up procedure requires a resonance check-up in both nozzles.

1 Like