"difference between detcted height of both printcores exceeds realistic expectations"

[pii 0]

I keep getting this error on my UM3 "difference between detcted height of both printcores exceeds realistic expectations". Active leveling doesn't work (it won't print the XY caliberation). Read a bunch of forums but nothing has worked for me so far.

 

The initial problem was that after the print went on for 1 out of 5 hours the build plate distance from the nozzle was too large and the nozzle keet moving in the air, thus ruining the print barely halfway through (happened multiple times). 

 

Help would be appreciated!! 

[gr5 1,292]

Manual leveling only affects the bottom 2 layers or so.  Mostly it only affects the bottom layer.  Active leveling can affect the bottom cm only because it's printing the part tilted.

 

I recommend you do manual leveling as it's more accurate and consistant than active leveling.  If you need to get active leveling working I can help you but it sounds like you have a much more serious problem.

 

Having it print "in the air" half way through the print has nothing to do with leveling (Z calibration) nor XY calibration.  It has to do with underextrusion.  Could you please post a picture of the problem?

[pii 0]

Thank you for your reply! I appreciate it. 

 

I just did the manual leveling and tried a quick print. After the build plate moved up it showed the same error and then it went on to 'active leveling' by itself ending with the same error.