ABL after each print

[adamfilip]

Ive noticed that After I run ABL and print something. the next time I want to print something I need to rerun ABL, cause it seems to be forgotton. even though the printer hasnt been turned off. between prints.

This is my ending script.
perhaps some clues in here

G91 ; Relative positioning
G1 E-2 F900 ; Retract 2mm at 15mm/sec to reduce filament ooze
G1 F120 Z+10 ; Raise off print 10 mm at 2mm/sec
G90 ; Absolute positioning
G1 F6000 X185 Y185 ;go to rear corner at 100mm/sec
G91 ; set to relative movement
G1 Z7 ; move Z up 7mm
G90 ; return to absolute movement
M104 S0 ; Turn off hot end heater
M107 ; Turn off print cooler
M140 S0 ; Disable heated bed
G92 E0 ; Reset extruder position
M84 ; Turn steppers off

any tips would be appreciated

[Roxy]

I bet you are doing a G28 in your start up GCode. And if so... By default that sets the Auto Bed Leveling Correction Matrix to unity.

[adamfilip]

I run G28 then G29

[Carrot_or_Stick]

I also run a G28 and then a G29 before each print. It's in the starting GCode in Sli3er

[MiniMadRyan]

If I remember correctly, G29 requires that all axis's be home'd first. Perhaps you could try a G28 when you first power on your printer, and then remove the G28 command from your start code. Your end code could then just set each axis to 0. In theory, this would work, as it's not a true G28 command, but I don't know if that would affect the matrix or not...just a thought.

[Roxy]

If I remember correctly, G29 requires that all axis's be home'd first. Perhaps you could try a G28 when you first power on your printer, and then remove the G28 command from your start code. Your end code could then just set each axis to 0. In theory, this would work, as it's not a true G28 command, but I don't know if that would affect the matrix or not...just a thought.

This might work... But the problem is with no movement, the G28 expires. The G29 insists that a G28 has been done fairly recently.

[MiniMadRyan]

Shoot, didn't realize the G28 has a time period on it...I guess that would be to whatever the motor timeout's are set for?...I wonder if one could modify the G28/G29 to maintain the matrix table and not erase it....

[Roxy]

Yes... Check in the Firmware Enhancements for Marlin folder. If you want that, it is already done....