I am still trying to get a good print and want to ensure that the bed is level. I ran the gcode file http://download.lulzbot.com/TAZ/calibration/bed_level.gcode to test it. The results show that the bed isn’t level.
In the manual on page 94, in Figure 5.3 it shows the correct nozzle height. I find it very difficult to eye ball the distance the nozzle is from the glass bed, and would prefer to use feeler gauges at the four corners and adjust the heights till they are all at the same level. What would be a good gauge to use? 5mil?
After reading the replies to this thread I did the following.
Home the X,Y,Z axes. Placed a sheet of paper (I measured it to be just less than 5 mil) below the nozzle and adjusted the Z axis endstop until I felt some resistance. Raised the Z axis, moved the X axis over. Placed the paper below the nozzle and homed the Z axes. I adjusted the fastener with the spring at this location until I had a similiar resistance as before. I repeated this at the other corners until I got back to the first position. Then I centered the X and Y axises and adjusted the Z endstop until I had a similiar resistance on the paper.