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VC4 400 Both back corners dip
The mesh range is less than 200um, so it would probably work without any changes. However, I would like to understand what could be causing this dual dip. Or perhaps, why does the x-gantry seem to bow more at the back than what it bows in the front? Tried re-tensioning the y-rails, and also tried making sure the y-rails run parallel by moving the gantry before tightening the screws. Seems the y-rail re-positioning/r-tightening had very little effect. This perhaps could be explaind if the y-rails/extrusions had a slight turn (like in a screw or a drill, I am sure there is a proper term for it..) in them, so that the x-rail gets bent slightly differently at the back vs. in the front. Any ideas on how to understand what is going on, and how to fix it? Twist the extrusions along their longitudinal axis with some yet-unknown method..?
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