How MatterControl evaluate the bed boundaries with BLTouch Offset?
seaquest42 last edited by
I just finished to setup my BLTouch on my MKS Base 1.6 MigBot i3 with the Marlin firmware V 184.108.40.206.
My main issue it's the formulas to apply on the differents values to set in the printer/MatterControl. Let me explain:
Using the MatterControl auto bed level feature 3x3, the first point is the center.
There's my constants:
Rectangle bed of course. FIRMWARE OFFSET TO Zeros (0,0,0) at the homing sensors are (-18, -48, 0).
My thought, I'm really offset but:
Question #1: Why my XMAX (220), computed by the application, take in consideration the Offset in the calculation? My distance XMAX isn't 220, it's 202. Exactly 220-18. I mean the Offset isn't there to set the real (0,0,Z) position + XY_BED_SIZE?
I've configured the MatterControl Z_PROBE_OFFSET to the T0 (E0 in my situation). The Offset of the probe is (-21,-6,0.36).
When I start the bed level adjustment 3x3 per example, the P1 is at the bed center.
Question #2: Why the computed position is in X=89? 110-21 = 89 so it's the PROBE_OFFSET who is take in consideration in that case. and why the P5 (FRONT_RIGHT) is always out of margin, under 220-21 (199) at X 171?
What mistake I've made / I've make.
Any lesson will be appreciated.
Have a nice 3D printing experience
tinken Global Moderator last edited by
If your bed size is 220 x 220, then it is not rectangular. P1 should probe the bed center (G28) prior to bed mesh (G29). Make sure Has Z probe is on and z servo is also on.