@BobB Thanks, I will try another z-axis switch if I don't get any other suggestions in the mean time! To work around the problem (rather than fix it) I removed the auto-home line from the g-code of any print I send, it's a bit of an extra hassle, but it does mean that the hot end is in the exact position I left it in after levelling the bed...no extra auto-home to mess it up.
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RE: Ender 3 V2 Auto-Home incredibly inconsistent - making prints almost impossible.
Ender 3 V2 Auto-Home incredibly inconsistent - making prints almost impossible.
I bought an Ender 3 V2 a couple of weeks ago and over the last couple of days a really hard to solve problem has started to occur: the auto-home feature has become unusably inconsistent.
Using the Auto-Home feature twice in a row will yield entirely different Z elevations for the nozzle (and so would require the entire bed elevation changing or a new Z-offset applying). This is bad enough as it is, but is particularly problematic when a print starts and the Auto-Home is carried out as an initial step....but sometimes the nozzle will end up several millimeters above the bed, and other times it will be pushing into the bed and no filament can get out.
I temporary work-around may be to remove the auto-home part of the g-code, but I'd rather just fix the actual problem. Any ideas what might be wrong and how to fix it?
The z-stopper switch thing isn't loose and the z-axis seems to move smoothly enough, but I'm willing to investigate anything at this stage.