Can't moving z axis under 0

General Discussion
1

Basic Information:

klippy.log
klippy.log (1.5 MB)

Issue:

When I move the axis, using a bedmesh generated by a bltouch, klipper says: “the Z doesn’t go under 0”.

How I can resolve this?

2

Set a negative position_min for your z-stepper.

3

I tried this solution, but klipper, if there is it, doesn’t use generated bedmesh.

4

What’s about Klipper generating a new mesh?

5

I already tried.

6

You are missing

position_min:

in stepper_z.

[stepper_z]
step_pin = PC13
dir_pin = !PF0
enable_pin = !PF1
microsteps = 8
rotation_distance = 8
endstop_pin = probe:z_virtual_endstop
position_max = 400

Set it to a negative value. Something like -3 to start with.
If that line is absent, Klipper takes 0 for position_min:

https://www.klipper3d.org/Config_Reference.html#stepper