This is on a UM3, isn't it?
The second print core is printing too close to the build plate.
There are a few things that can cause this and for now I see only two possible options:
1) Do a factory reset from the menu to clear all existing leveling data. It should work correct after this. Perhaps first note the XY offsets for your current print cores to avoid having to do the calibrations again. I always leave them at the default value as the results are good enough for me.
or 2) Do not use the automatic leveling. On the smaller bed size from the UM3 this is a nice gimmic, but manual leveling will give you just as good printing results and is slightly faster. On a larger printer like the S5 the automatic leveling is required to get good adhesion.
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Carla_Birch 90
Hi,
Do you have PLA loaded into both number 1 and 2 print cores at the same time when you try the XY Calibration, or you using a mix of PLA & for eg PVA?
Also what print core types are you using, eg AA or BB.
Lastely have you checked the tension setting on the number 2 feeder, the little marker should be in the center placement.
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