Bed corners too high
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Greetings!
I just measured my 320x400mm aluminium bed and although the height map could be worse, I wonder if anything can be done to correct the imperfections shown below:
As you can see the mean error is kinda low but the corners are a bit too high with deviations up to 0.254mm at Corner 2. You can find a sketch of my printer layout below:
The gantry moves on two linear rails (MGN9) in X-direction and the print head moves on the gantry on a linear rail as well in Y-direction whereas the bed moves in Z-direction.
I wonder if any adjustments can be done mechanics-wise to get rid of the high corners or is this as good as it gets? Maybe raise/lower one of the rail (1-2-3-4) or gantry ends (5-6)? The bed is made of aluminium with a magnetic sheet and removable spring steel installed on top of it.
(Note: I currently use an IR probe on bare spring steel and although the steel is quite shiny, I got pretty good repetitiveness for the measurements.)
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@techni It looks generally flat along the X axis, but bowing in the Y axis. Assuming the aluminium bed is actually flatter than the probe results, I'd look at whether the carriage is rotating around the Y axis as it travels. If you have a carriage that is heavy on one side, it may be twisting the Y axis. If your probe has a large offset in the X direction, it will also exaggerate any twisting of the carriage.
Ian
