First layer

[KingCrab]

Printer Model

2.4r2 300mm

Extruder Type

Clockwork 2

Cooling Type

Stealthburner

Hello,
I just build my Voron and I'm following Ellis Tuning Guide to setup everything for the first time. Unfortunately I can't get it to print a working first layer. I already calibrated my extruder a few times and tried a lot of z offsets beside the calibrate_z macro, but without any luck. My test print ( 100x100x0.3mm ) always has unconnected paths like shown in the picture. For me it looks like the bed mesh is somehow inverted, but when I uncomment the bed_mesh_calibrate command, it looks exactly the same. I have no clue how to investigate any further. Maybe someone has seen such an error or has an idea how to move on?

Thanks in advance

 

[NoGuru]

Make sure and do a Save_Config after you do the bed mesh.

Also try a different slicer, or different starting layer height and extrusion width.

 

[KingCrab]

I tried a few different settings today and it is possible to close the open spaces, but I think that does not solve the original problem as I still can see differences in height between bottom left to top right. Bottom left is perfectly smooth and top right is wavy and looks overextruded.

Make sure and do a Save_Config after you do the bed mesh.

Do I have to Save_Config with every print? I do a bed mesh before every print and as I understand the log message, save_config would preserve the result for later use and restart the firmware. That would interrupt my run, wouldn't it?

 

[NoGuru]

I tried a few different settings today and it is possible to close the open spaces, but I think that does not solve the original problem as I still can see differences in height between bottom left to top right. Bottom left is perfectly smooth and top right is wavy and looks overextruded.


Do I have to Save_Config with every print? I do a bed mesh before every print and as I understand the log message, save_config would preserve the result for later use and restart the firmware. That would interrupt my run, wouldn't it?

You are correct, if you are doing a mesh for each print you do not need to save it.

 

[Indeed]

If your printer.cfg was created from a template for a recent klipper version there might be a BED_MESH_PROFILE LOAD command towards the end of the PRINT_START macro.
If there is, comment it out since it overrides the results from a BED_MESH_CALIBRATE made just before. Just a thought...

With klipper versions from 2023-02-01 and later the bed mesh must be loaded using the BED_MESH_PROFILE LOAD command.

From the klipper docs at https://www.klipper3d.org/Config_Changes.html
20230201: The [bed_mesh] module no longer loads the default profile on startup. It is recommended that users who use the default profile add BED_MESH_PROFILE LOAD=default to their START_PRINT macro (or to their slicer's "Start G-Code" configuration when applicable).

 

[KingCrab]

Unfortunately I don't have BED_MESH_PROFILE LOAD in my printer.cfg.

But you point me to another problem. I stupid forgot to attach the printer.cfg.

Thanks for pointing me to the change and indirectly to the missing file