Dramatically improve automatic bed leveling time

General Discussion
1

Basic Information:

Printer Model: Creality CR-10s Pro v2
MCU / Printerboard: Creality 2.4 mainboard
Host / SBC: Raspberry Pi 4B
klippy.log (n/a)

Hi!
I have an idea that can dramatically speed up the Automatic Bed Leveling before starting a print. (If it’s possible to be implemented)
I have a bl-touch and on the start of every print I measure 5x5 grid which takes some time.

My idea is:

  1. Create a large mesh (10x10 for example)
  2. On the start of every print, make a 2x2 mesh (4 points only on the corners)
  3. Align the large 10x10 mesh with the 4 points from the 2x2 mesh and load the large mesh.

Is this possible?

NOTE: z-tilt is not available for my printer because the mainboard has only one z driver.

2

Klipper already supports adaptive mesh.

3

But what about when you print a large object that covers most of the build plate? For me, 5x5 mesh doesn’t give good results on the first layer because my bed is badly warped.

4

Why are you doing a mesh every time you do a Print?

Heat your Bed up to the most used Temperature, make your Mesh with 10 by 10 and save it as i.e. “default”.

Use in your startup-code after homing and bed-heating the following command →
BED_MESH_PROFILE LOAD=default

Thats it.
No need to do a bed-mesh every time, your Bed is always the same and will warp always the same way at the same temperature and you don’t need a 4x4-mesh, you only need the height from the homing-procedure.
Normally you only have to do new mesh after adjusting the hardware.

/edit
Seems it already was implemented… :wink:

5

I’m doing a mesh every time I do a Print because when I turn off the printer, the x axis drops on the left side and I adjust it every time I start the printer (I will order anti backlash nuts for the z lead screws).

Already implemented?? :partying_face: :partying_face:
Where can I find it?

6

I could be mistaken on the capability of bed mesh adjustments, but usually bed mesh is only made to deal with small variances. Like sub mm.

If your entire X gantry is sagging that’s a massive mechanical issue. I see you said that you were going to order some anti-backlash nuts. That’s a good start.

There’s no real way to massively speed up mesh calibration as it’s not meant to be ran often. The real fix is fixing your gantry.

7

Get a Beacon/Cartographer3D and if the substrate is metallic, you can do a mesh in 10 seconds.

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8

Sorry, I forgot to mention, my printer has an 8-bit board and it doesn’t support beacon/cartographer :frowning:

9

You have klipper with your Pi, the probe goes connected to it, not the MCU.

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10

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