[BUG] Sensorless homing on a COREXY with SKR1.3/TMC2130 failed

[wolfgangmauer]

G28 moves X to X-Home position, Y only moves about ~1 mm and then stops at wrong position
Even with lower/higher values on _STALL_SENSITIVITY and _HOME_BUMP_MM=0 don't work

Workaround:
G28 X
G28 Y
G28 Z

Works fine, but cannot be executed with the LCD
Marlin.zip

PS.
On enable QUICK_HOME G28 works like expected!

[AnHardt]

#define INDIVIDUAL_AXIS_HOMING_MENU

[boelle]

@wolfgangmauer is this still an issue?

[wolfgangmauer]

Yes, there are „Workarounds“ but the normal G28 don’t work. (EDIT: removed email headers)

[boelle]

@wolfgangmauer and the tip from @AnHardt did not help either?

do you use 2.0.1 or bugfix 2.0.x ?

[wolfgangmauer]

I use 2.0.1, but was the same behavior with bugfix-2.0.x… (edit: email headers removed)

[boelle]

I use 2.0.1,

that one is not updated as much as 2.0.x, in fact 2.0.1 is just an frozen copy of 2.0.x

[wolfgangmauer]

THX,
updated to git 2.0.x. Updated configuration, same result :-(
Now y moves more (~1 cm) and than stops at wrong position. Even with higher Y_STALL_SENSITIVITY value.
Maybe problem with my NEMA17 running 0.9° ?!

But if separated G28 X/G28 Y/G28 Z works, must be a firmware problem ?!

[wolfgangmauer]

I just tried the TMC2209/UART with sensorless homing, it works as expected!

[boelle]

@wolfgangmauer so we can close this one?

[wolfgangmauer]

I found a workaround, but it's still a issue! EDIT: removed email headers

[wolfgangmauer]

Getting more and more strange 👎
If i cancel a print, restart same, homing on X don't work

[boelle]

btw... even prusa printers with sensorless homing have a deviation of about 0.3mm
so i cant recomment it, its just a gimmick

[Lino77]

Have exactly the same problem with SkrPro and tmc2209. G28 X works and at Y it only moves a few mm and stops at the wrong position G28 X G28 Y G28 Z works perfectly.
Marlin bugfix-2.0.x was 1.3.2020
Marlin.zip