I pretty much followed the “quick_start_guide_2.pdf” to level my bed, but there were a few things not mentioned, and I thought I’d share what I did.
this part is as described in the guide:
- Start Printrun and Connect to printer
- Lift extruder off glass about 50mm in Z
- Home X and verify position
- Home Y and verify
- Adjust Z End-Stop Knob counterclockwise (i.e. raise it ~ 1 cm)
- Home Z and it should stop above glass ~ 1 cm
- Put a sheet of paper on glass below nozzle, and adjust Z End-Stop Knob clockwise a little and Home Z each time to bring it closer and closer to the sheet of paper; as you get close, turn the knob in 1/2 turns at a time and Home Z each time until it nearly hits the paper. Now adjust the knob in small increments, 1/4 or 1/8 turns until the paper just barely has some tension to pull it out from under the print head.
this is my addition:
- once you get the paper to have just the right tension on the front left corner (i.e. all axii Homed), with motors off (default), slide the extruder assembly by hand manually to the right… check the tension of the paper as you move it to the right… adjust the front right corner height screw… up or down… to maintain the same tension. Slide the extruder carefully, and stop if you feel the slightest tension on the paper increase… if so, lower the front right corner using its adjustment screw (clockwise to lower). If too loose, raise the right corner using the screw (counterclockwise).
- now do this for back right corner, by manually sliding the Y glass bed all the way forward. The extruder is still very close to the bed, and you need to carefully maintain the paper’s tension (adjust the back right height screw accordingly).
- do the same procedure for back left corner, again slide the extruder assembly by hand and maintain the tension by adjusting its screw. Now all four corners should be pretty level.
- I repeated this procedure once more, then moved the head manually around the bed, checking the paper’s tension, very slightly adjusting the screws one final time until perfect
The advantage to sliding the extruder manually with the motors off, is that you will not force the print head into the glass damaging it. You can slide the extruder easily and feel the slightest drag or looseness. I would constantly check the tension of the paper by sliding it back and forth under the extruder.
This seemed to work great, and so far my prints have come out level and perfect on the glass. Hope it helps.