BLTouch and UBL (no replies)

Hello,

I'm having real troubles getting my BLTouch and unified bed levelling working and was wondering if someone could critique my calibration setup. I use this every time anything physically changes with the printer.

Printer: Anycubic I3 Mega w/ Ultrabase and BLTouch


Bed Leveling 1:
*************
Pre-heat the nozzle and bed.
G28;
Make sure both z axis are the same height. Adjust where necessary.
Manually level the bed with a piece of paper (0.1mm)

Set probe height
****************
Remove paper (from above)
M502; Reset everything
M500; Save blank settings to EEPROM
M501
G28;
M851 Z0;
G0 Z10; Raise Z 10mm
Deploy the probe.
Move Z down slowly until the probe triggers.
M114; What the printer believes the Z height is. Take the current M114 value and negate it. (0.80 => -0.80)
M851 Z-0.80; and #define Z_PROBE_OFFSET_FROM_EXTRUDER -0.80
M500;

Set probe trigger height
*****************
M211 S0; Disable software endstops.
Put a piece of paper on the bed (0.1mm)
G28 ; Home the axis.
G0 Z0; Home Z to zero.
M119; Check what the end stops are doing. Z should both have triggered.
M114; to check what it thinks the Z height is
G0 Z-X.XX; Adjust the Z height down so it just grabs the paper, taking note of the Z adjustments made.
M114; Write down the new Z height
M851 Z-x.yz; This is last M114 result minus the 1st M114 result. Negative, if nozzle is above trigger point. This is #define Z_PROBE_OFFSET_FROM_EXTRUDER -X.XX in marlin
M500; Save the settings
G28; Home everything.
Remove the paper from the bed.
Carry on with Auto bed levelling below.

Bed Leveling 2:
*************
G29 P1; Automatic Probing
G29 P3 T ; Repeat until all mesh points are filled in.
G29 S1 ; Save UBL mesh points to EEPROM.
G29 F 10.0 ; Set Fade Height for correction at 10.0 mm.
G29 A ; Activate the UBL System.
M500 ; Save current setup.
M211 S1; Re-enable software endstops.




I think the issue I have is that I'm getting mixed up setting my nozzle height and probe offset.

Configuration file attached.