Hello all!
I am fairly new to the 3D printing world, although I have good technical knowledge of what it involves and am very comfortable dealing with issues and debugging, but this is quite beyond me…
After finishing all the wiring, sleeving and setting up my machine, I noticed that the firmware that was loaded was the standard V1 firmware, w/o the auto-levelling options. I set out to get it flashed and levelled accordingly and everything was fine until then. I loaded a test cube model and attempted my first print, noticed the base was not sticking adequately and turned the machine off for a few hours until i could figure things out.
Upon turning it on again and going for the calibration (w/ the provided default Anet auto-levelling sensor) the first detection pass went smooth and as expected. The printer head went back to home position, ***then dropped a few mm down*** and the carriage attempted going back to centre of bed and got caught on the edge, scraping my buildtak mat and getting stuck!
Every time ever since, when I attempt to do custom levelling (as prescribed) to calibrate the extruder/bed offset, that second sensor pass ends up either making them (bed+extruder) collide or pass very close to the surface and scrape on the buildtak.
I noticed that the calibration automatically registers a -5.60mm Z offset (which seems to correspond to that lowering stepthe carriage does before going over the bed that second time…
I have no idea what i should be doing next as I already did a re-flash of the firmware to purge any conflicting settings or bugs and it’s still doing it. Manually setting Z to it’S highest position also has no effect.
Has anyone ever had any similar issue or knows what I should do to get things going again?
Thanks in advance!
Hi Nathan and welcome to the 3D printing wonderland 
This sounds quite strange and I assume there is something wrong with your firmware offsets…
Could you upload your Marlin configuration file?
Another hint: after changing the firmware I always load the „Failsafe settings“ in the control menu. This will wipe all stored values from the EEPROM and load the firmware settings. I also had some strange things happening until I figured out that the printer is partly using some old settings…
