extruder head hits build plate despite leveling

[pa9k]

Hi 82cabby!
We had this issue with our z18 at first. No matter how many times we leveled the plate or reset it it would always hit the build plate. I ended up manually adjusting the z axis offset. Raise it all the way up and stop your print after the first raft layer. It will probably look very bubbly. Lower the offset one step at a time until the raft layer is smooth.An offset of .6 works best for us. Hope this helps. fyi I complained to support about this and they sent me a new plate and tape.