3d Touch Calibration

[siam]

Hi,

I'm think to stupid to callibrate the 3d Touch with Geeetech Prusa I3 Pro B.

If i do so :

M851 ; note the number

M851 Z0 ; set the offset to zero

G28

G1 Z0

The LCD display should show Z = 0

until here all OK but this dont work:

From the display go to the Menu then Prepare/Move axis/0.1mm/Move Z
I cant drive the Z Axis to a negative position

So i have testet to find the right position with :

M851 Z-1.5 ; to set the offset you got in the previous step.

Here was the problem that i have allways get this answer from the Printer:

echo:Z Offsetz_min: -15z_max: -5

to solve this issue i have canged this in the firmware

#define Z_PROBE_OFFSET_RANGE_MAX -0 // andy war -5

after this i can set the offset but if this the right way to solve this issue im not shure.

maybee someone can help me here ?

regards

Andy

[cosmith]

That's fine. The latest versions of the firmware use a range of -20 to 20.

[siam]

Ok ! Thank you now is the question what wend wrong by the calibration see my first post ?

regards

Andy

[cosmith]

You are doing it right. It's the Z_PROBE_OFFSET_RANGE_MAX that was the problem. It has to be set higher, like 0 or 25. It defaults to -5, and we need around -1.5, so it won't let us get the number we need.

[siam]

ok Thanks i will try it again

[gpau]

hi,
I followed. the instructions for configuring the 3d touch firmware for i3 pro C, but does not work.
The configuration procedure is the same as the i3 pro B.
Who has the firmware strings already changed?

Thank you

[William]

I guess i3 proC can't install the 3D touch.