A new proximity sensor "fixed" the Tina2S I acquired (in that it now sort-of works), but there remains a problem: although it goes through the 3-point pre-print levelling, and although I can see the Z axis lead screw making adjustments as the nozzle moves in XY, it doesn't seem to be making sufficient/correct adjustment.
The effect is that the first layer is thick on the right hand side and thin to non-existent on the left (the nozzle nearly scrapes through the tape). I never saw this happen with my Tina2.
If/when I find a solution I'll let you know.
Tina2S Bed Levelling Issue
Moderator: CrazyIvan
Re: Tina2S Bed Levelling Issue
I don't see how.
When the bed levelling operation senses the position of the bed, it can't tell the difference between the bed and the X gantry – all it knows is the Z displacement when the proximity sensor triggers. The plane of the bed as measured in the printer's XYZ space (not necessarily physical XYZ space) is then subtracted from the target Z as the head tracks the target X and the bed tracks Y.
It's all quite clever and eliminates the need for X or Y to be perfectly orthogonal to Z.
I have not got around to investigating this further, but I have no good ideas how to diagnose the problem. I'm still using my Tina2S for anything serious.