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Printbed leveling and calibration

 

First layer

The first layer is probably the most important feature of a print and if the printbed is well leveled and properly calibrated it should look something like this, click on the picture 

1. Printbed leveling:

  • Make sure the print bed (part E) is well fitted onto the Y axis rack (part D)
  • Make sure the buildtak sheet is properly held in place and evenly leveled into the print bed frame (part E)
    • When you tighten the bolt make sure it doesn't go under the acrylic plate
      • If it does go under, your printbed will be uneven
  • Lift the Z axis rack manually (part C) and keep adjusting many times the Z height thumb wheel until:
    • You hear the Z endstop click and at the same time...
      • The distance between the print bed and the hotend nozzle is approximately 0.5 mm (eyeball it for now) 
  • Connect to Pronterface
  • Home the X, Y  and Z axis with Pronterface
    • Move the hotend to all 4 corners of the Printbed and then carefully adjust the leveling screws under the print platform to make sure the distance between the hotend and the printbed is relatively the same on all 4 corners
      • Start adjusting the leveling screw of the worst corner first and then the second worst and so on...
      • Please note the final adjustment will be done after a few test prints

2. Printbed calibration (watch the video below)

  • While still connected to pronterface
    • Center the hotend to the printbed 
    • Insert a regular sheet of paper under the hot end
    • Home the Z axis
    • Keep adjusting the Z axis thumb wheel and homing the Z axis until you can actually feel the paper slightly rubbing under the tip of the nozzle
      • Be careful not to adjust it too close to the print bed (it might jam the hotend)

3. Test prints

  • Do a few test prints and fine tune the leveling screws and/or the calibration bolt until you get a good first layer to look like this 

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