G29, G29 L, G29 J - Bed leveling
Been using PS for about 6 -8 months. I have an Ender 3 Pro with a SKR 1.3, Bondtech DDS and MMU2S.
I think this has been going on since maybe 2.1.1. All of a sudden, I can get a good first layer.
Been trying to print the Prusa face shield which take up most of the bed and have only had 1 in like 50 trys to print. I had to reduce infill from 30 to twenty to keep my DD extruder from grinding.
I had been using Unified Bed Leveling in Marlin 2.0. I reverted back to a version of Marlin 2.0 with bi-linear bed leveling, thinking something may be wrong with UBL.
Can't even get the BLTouch to deploy for bi-linear. It does with UBL but I highly doubt it is using the mesh.
The version of Marlin 2.0 is from 11/25/2019.
Here's my start gcode in case it maybe a problem.
;M115 U3.7.2 ; tell printer latest fw version
;G90 ; use absolute coordinates
;M83 ; extruder relative mode
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
;Tx
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S[first_layer_temperature] ; wait for extruder temp
G28; Home axis
G29; Auto bed-level (BL-Touch)
G92 E0 ; Reset Extruder
;G28 W ; home all without mesh bed level
;G80 ; mesh bed leveling
;G28; Home Axis
;G29 L1; Auto bed-level (BL-Touch) UBL
;G29 J; UBL
G21 ; set units to millimeters
; select extruder
;Tc
; purge line
G1 Z1.0 F3000 ; move z up little to prevent scratching of surface
G1 X0.1 Y20 Z0.3 F5000.0 ; move to start-line position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; draw 1st line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; draw 2nd line
G92 E0 ; reset extruder
G1 Z1.0 F3000 ; move z up little to prevent scratching of surface
; End of custom start GCode
Might be a bug, IDK
TIA