Posts

Showing posts with the label Bed Levelling

More mopping up and a delivery arrives!

Image
Despite having changed it already, I was still not altogether happy with the mount for my Y axis cable chain where it meets the bed. I had lowered it to accommodate the BL-Touch, but I then also replaced the glass bed with with a thinner magnetic PEI-coated flexy bed . This made the bed a millimetre or so lower which made me wince every time the BL-Touch headed in the direction of the connector.  So, I went back to the drawing board and completely redesigned the fixing, changing it from a single horizontal screw above the mount to a pair of shorter vertical screws and a thin clamp bar. I also tweaked the fitting by a millimetre to bring the mounting just a little nearer to the bed, now that the glass top is no longer there.  I moved from this To this new version Which now sits very flush, as can be seen here. Another change I made to it was to remove one small support bar at the rear. Although this provided some theoretical extra support across the mount, it  did mean th...

Bed levelling woes

Image
One of the effects I have noticed during testing is that although I now have ABL set up and (seemingly) working, it doesn't seem to be as accurate as I'd expected. I have analysed the mesh and the right side of the bed is slightly lower than the left. By watching the printer I can see that the Z axis is certainly moving during a single layer of a print, so something is clearly happening.  Despite this, the print quality is very poor on the right side, whereas the left is very good.  Left side of bed Right side of bed To te st this further, I created a test model (I know that there are hundreds, but I couldn't find one which was quite right for what I wanted) and printed that several times. Each time, the right (lower) side of the bed was printing with much poorer quality than the left.  My test model My first thought was that perhaps my Z steps/mm were wrong and the printer was simply not moving the correct amount. I re-calibrated and tested this twice, but everything see...