How do you level a bed with Marlin?

How do you level a bed with Marlin?

Mesh Bed Leveling from the host:

  1. Use G29 S0 to get the current status and mesh.
  2. Use G29 S1 to move to the first point for Z adjustment.
  3. Adjust Z so a piece of paper can just pass under the nozzle.
  4. Use G29 S2 to save the Z value and move to the next point.
  5. Repeat steps 3-4 until completed.

What does G29 do in Marlin?

To probe the bed using G-code: Use G29 to move to the first point for Z adjustment. Adjust Z so a piece of paper can just pass under the nozzle. Use G29 to save the Z value and move to the next point.

What is Marlin mesh leveling?

Mesh bed leveling creates a mesh model of your bed, lowering or raising the nozzle while printing the first layer to compensate for the uneven spots. Its setup requires a bit of firmware configuration and light manual installation, but it’s easy as these things go.

What is G code G29?

G29 – Return from reference position G29 is also a two-step command. First, it causes the machine to move (in the axes commanded) to the intermediate position used in the most recent G28 command. Second, it causes the machine to move to the position included in the G29 command.

Do you need to G29 before every print?

The G29 command needs to be replaced with M420 S1 for Marlin firmware operated printers. This command will load the saved mesh at the start of the print from memory.

How to enable automatic bed leveling on Marlin G29?

Use M502 to reset the bed leveling data (and other settings to defaults). Use M501 to reload your last-saved bed leveling from EEPROM. This is done automatically on reboot. After a G29 bed leveling is automatically enabled, but in all other situations you must use M420 S1 to enable bed leveling.

How does mesh leveling work on a Marlin bed?

Each leveling system comes with its own set of options and makes G29 behave differently, so documentation for these G-codes is divided up into 5 separate pages. Mesh leveling measures the height of the bed at several points to generate a 3D mesh representing bed imperfections.

Is it safe to use G29 P3 for bed leveling?

This version of G29 P3 is a quick, easy and (usually) safe way to populate unprobed mesh regions before continuing to G26 Mesh Validation Pattern. Note that this populates the mesh with unverified values.

How does MBL work with the G29 mesh?

MBL uses the mesh to compensate for variations in height across the bed. Use G29 S0 to get the current status and mesh. If there’s an existing mesh, you can send M420 S1 to use it.