Auto level not doing it's job. Bumping into print/too close

[wingxzero]

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Any Idea on how to fix this? The bed is level on all 3 sides . The nozzle is at the correct height in the center of the bed. But it seems as though the plate is warped.

[Mark]

use a glass or some tapes on the bed to make it better.

[wingxzero]

I put a glass plate on there and the nozzle is still too close on one side mostly. How do I get that one side to be higher up after auto level? The bed is leveled on each screw on the plate and the axis arms are also level with the screws next to the rods. they are all within paper with apart. What else can be done to get a the nozzle further away after auto level?

[wingxzero]

I placed a piece of glass on top of the plate and It still had issues getting an even height on all sides after auto leveling.
Each axis of the carriage has been leveled to within a paper height from the bed. The top right corner is still too close to the bed. How do I get configure the the firmware so that the auto level makes it so it isn't so close to the bed that it wont extrude on that one side?

[Mark]

the auto leveling works only when the bed is inclined, if the bed is warped then it won't work...

[Forrest]

I am having some similar problems with ABL. Seems sometimes it does work and sometimes not. I plan to try to use an optical limit switch and reduce spring tension to a minimum as I notice that triggering the limit switch does seem to alter the position of the hot end tip at times and on some rare occasions seems one point does not trigger correctly and table is off ... have you looked at the table given after ABL, it is consistent on showing tilt or is one point out of wack? Does it seem repeatable on 2 or 3 different G29's? Mine is usually pretty good after I reduced the spring compression to the minimum needed to trigger the limit switch.

Does it make any difference if hot end and bed are "up to temperature" or cold? I'm not sure ....

[Mark]

seems up to temperature would be better...

[wingxzero]

Okay I've placed a glass plate on the bed. i've adjusted all three screws for the pressure switches. So it is fairly even on each side. I'm now having issues with the print being too close on the first layer. I can here the extrude skipping. The area on the video that is missing a layer/is patchy still exists but is much smaller. Then as the layers progress i'm noticing the layers are not adhering and do not have enough squish, eventually the printer is just printer on air as it is too far off. It seems to be fairly accurate though as far as how the first layer its just not the right heights.I'm wondering if I should just delete my current marlin settings and start with stock besides the distance for z height and auto bed sensor distance.

[Forrest]

Try using z offset in slicer to lower 0.1 mm at a time .... or adjust your z offset for ABL and recompile.