Auto Bed Leveling issue

I have a Geeetech I3 Pro C with a BLTouch fitted and working with Marlin 2.0.5 Bugfix (about 2 days old).

It is setup to probe a 4x4 matrix and uses :-

#define AUTO_BED_LEVELING_BILINEAR
#define EXTRAPOLATE_BEYOND_GRID
#define GRID_MAX_POINTS_X 4

It runs OK probing all 16 points but when printing a large job (~150x100mm) I notice that one corner of the "Skirt" seems to be not quite right because while the rest of the "skirt" is nice and smooth, that corner it is rather "blobby".

Adjusting "babysteps" helps but then the rest of the skirt isnt perfect any more.

The bed is a Borosilicate glass plate covered with "Blue Masking Tape" and as far as I can measure is pretty damn flat.

Anyone have a hint as to what to look for ?

TIA
Dave

I would try to lower that corner by .1mm and make sure

this line is enabled
#define RESTORE_LEVELING_AFTER_G28


Have seen people printing with a massively tilted bed, Have never got anything close to that working.
I level the bed as close as possible then use baby steps myself.

Edited 1 time(s). Last edit at 04/22/2020 12:32PM by Roberts_Clif.

---

Computer Programmer / Electronics Technician