Hey Everyone.
I recently inherited a Kossel Mini running some heavily outdated firmware. I decided to update it inline with the current 1.1.8 Marlin build, however, since the update the printer now homes in the opposite direction - directly for the print bed, instead of up towards the endstops. I initially suspected bad wiring of the endstops or incorrect logic in the configuration file: however, everything seems fine there. There was an inductive z-probe connected, and I wondered if, again, bad wiring or enabled auto-levelling was causing the issue: but again, with said features disabled and the probe removed, the behaviour is still erroneous. Desperate, I tried inverting the home direction. This threw up some safety errors regarding Delta printers always homing to max (not min), so I decided to come here.
So, to summarise:
- I've tried removing and disabling the z-probe (and levelling features)
- I've attempted to vary the endstop logic
- I've manually changed home direction - altering #define Z_HOME_DIR does not change behaviour (still homes down)
Is there anything I've missed? I dont have the original config file I'm afraid, but I do have (and have attached) my current config file. If I'm honest, it's very similar to the current 1.1.8 release example config for Kossel's. I should mention from a hardware side: the endstops are wired into X/Y/Z+, and the probe (was) wired to Z-, which I believe is the correct pin setup?