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MarlinFirmware / Marlin

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
https://marlinfw.org
GNU General Public License v3.0
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[FR] Add option to G29 Bed Leveling to skip if leveled since boot #26617

Open chrisheib opened 6 months ago

chrisheib commented 6 months ago

Is your feature request related to a problem? Please describe.

While I do like to level once when starting a print session, it is quite a waste of time and sometimes reported as unnecessary wear on the printer to do it before every print in the same session. When slicing an object for marlin, I would need to prepare two versions of each print if I wanted to do multiple, one with and one without G29.

Describe the feature you want

I would love if there was a flag added to G29 that would only trigger the leveling if no leveling was done this session. I believe the alternative print bed icon that shows arrows when the bed is leveled already uses such a flag.

EvilGremlin commented 6 months ago

Just load mesh from EEPROM?

robherc commented 6 months ago

If you enable #define RESTORE_LEVELING_AFTER_G28 in your configuration.h file, you can simply manually run a G29 bed-leveling whenever you first start up your printer for a new session; then leave the sliced .gcode files with only G28 in the startup G-code.

plampix commented 6 months ago

G29 O

Does exactly that. You just have to make sure leveling is not enabled at boot-up. You can do this with an auto#.g file on your sd card. Combined with the earlier mentioned RESTORE_LEVELING_AFTER_G28.

EvilGremlin commented 6 months ago

O is only for bilinear though

plampix commented 6 months ago

O is only for bilinear though

Ah, it's not available for Unified or manual, but it is for the rest. In that case it's a valid feature request.

Tannoo commented 6 months ago

#define RESTORE_LEVELING_AFTER_G28

Run G29 to get your leveling matrix. Save it with G29 S0. Then run G29 A L0 at boot and it will be there. This could be done in CONFIGURATION_ADV.h with #define STARTUP_COMMANDS "G29 A L0".