Friday, April 03, 2026
Bed Levelling Continues. Potential new Stage
Been away for a bit. Back on bed levelling. I've updated the bed leveller a bit (it doesn't just crash if the probe is already touching the bed), and been playing around some. I can get the bed levelled to 1μm over a mm or so, but trying to stretch that to 4mm doesn't work quite so well.
The problem I think is that there are four adjustable fixing points on the Stage, and there should only be three. The three-legged stool level thing. Now Jon Oxer is going to hate me for this, but I'm going to design a new Stage attachment scheme, which means I'll need to make a new PIKA XY Table design. The change is trivial to make in the model, not that it'll make Jon feel happier :)
To make me unhappy, I want to see how Jon goes with his assembly, so I know what other changes I need to make, and change them all at the same time. So I am very tempted to go do other things with μRepRap and come back to the Stage issue later. Of course, I want it all changed at once so I can go and do the documentation with assembly pictures - which also has to wait if I go down that path. Your thoughts?
(I didn't want 3-point anchoring because I'm worried that the Y Axis Driver might pull the Stage out of line. However, I can't see a way out of it.)
