I made a very slow video showing the marlin version in operation on my Ender 3 on my SKR mini board.

I implemented MECHANICAL_GANTRY_ALIGN as a Klipper macro almost immediately after getting klipper running on my SKR mini.

I still use this on my Prusa style printer, despite it having a driver for both stepper motors. If I disturb the adjustable bed, I use this to set the gantry parallel to the top of the frame as a reference before running SCREWS_TILT_CALCULATE (G35 in marlin, use it) to set the plane through the 4 corners of the bed to be parallel to the Y axis and the level taken from the frame top. However in my START_PRINT routine i use Z_TILT_ADJUST because the bed doesn’t go out of tram once set up unless something really bad happens.

This requires TMC drivers to be set up (using UART or SPI) to allow software control of the stepper current. Without that, or if you use too high a current it may break your printer. This does not use STALLGUARD or sensorless homing.

Even better there’s some templating language available so you can query which hotend setup and nozzle size you have. This isn’t always perfect as I’m needing to use different filament profiles for highflow hotends/CHT nozzles but it does reduce the amount of tinkering to get a print to work as I usually have a filament profile set up for every brand and type of filament or maybe every spool with a custom flow multipler set, as they’re all slightly different, ABS is very different from PLA.

First in printer settings -> notes we set some tags to identify the printer type. On my switchwire I have

PRINTER_VENDOR_PRUSA3D
PRINTER_MODEL_MK3
PRINTER_MODEL_E3DD
PRINTER_OS_KLIPPER
HOTEND_AFTERBURNER_E3D
HOTEND_AFTERBURNER_REVO

I’ve left the prusa tags in because my printer runs of modified MK3 profiles, and the stock MK3 profiles work great, they’re just very slow on a printer that can do very quick accelerations.

PRINTER_OS_KLIPPER is there for me to test whether i should output marlin gcode or klipper extended gcode

HOTEND_AFTERBURNER_E3D is there for me to test for what kind of hotend I have, I also have HOTEND_SWITCH_E3D for a multi extruder bowden setup like a prusa MMU1 (obligotary UberNero) and HOTEND_AFTERBURNER_CHT for my copperhead/cht highflow setup. I’m not actually doing anything different with HOTEND_AFTERBURNER_REVO yet, it seems to be performing like an E3D V6 everywhere i would need to tune it, including the max vol flow, but I’ve only tested that with PLA.

In filament settings -> custom gcode the fun really begins. In the start gcode I might have something like this that

{if printer_notes=~/.*PRINTER_OS_KLIPPER.*/ and printer_notes=~/.*HOTEND_AFTERBURNER_E3D.*/ and nozzle_diameter[0]==0.4} SET_PRESSURE_ADVANCE ADVANCE=0.060 SMOOTH_TIME=0.040{endif}  ; 2022-04-14 stealthburner ultramarine blue

{if printer_notes=~/.*PRINTER_OS_KLIPPER.*/ and printer_notes=~/.*HOTEND_SWITCH_E3D.*/ and nozzle_diameter[0]==0.4} SET_PRESSURE_ADVANCE ADVANCE=0.38 SMOOTH_TIME=0.080 {endif}  ;guess

{if printer_notes=~/.*PRINTER_OS_KLIPPER.*/ and printer_notes=~/.*HOTEND_AFTERBURNER_E3D.*/ and nozzle_diameter[0]==0.25} SET_PRESSURE_ADVANCE ADVANCE=0.1275 SMOOTH_TIME=0.040 {endif}  ; guess, from anycubic

and in the filament end gcode I just get rid of pressure advance, mostly because it makes MMU behaviour less violent, although I should probably just turn pressure advance off in the MMU filament change scripts.

{if printer_notes=~/.*PRINTER_OS_KLIPPER.*/} SET_PRESSURE_ADVANCE ADVANCE=0 {endif}

Further reading

• PrusaSlicer Macro language
• PrusaSlicer available variables

Why? Thingiverse requires me to disable Firefox’s tracking protection.. I find this really intrusive. I don’t have a problem with being shown ads. They gotta pay the bills. I’m not handing over my privacy because they can’t tell the difference between adblockers and tracking protection.

Most things i have done are all bundled into small-fff-projects, and I’m going to try to use PrusaPrinters and maybe Thangs more, but I’m keeping and linking back to github as my most recent versions.