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After stopping movement of extruder and platform, tighten the three nuts below the
platform counterclockwise. (This procedure is important to avoid scratches on the
construction plate caused by the extruder)
Choose one extruder and move it to the first nut by hand. Place a sheet of paper
under the extruder and tighten the nut to reduce the distance between extruder and
platform. Gently move the paper and feel the friction. If the paper has only slight
friction, the distance between the extruder and the platform is set correctly. After the
adjustment of the first plate is completed, repeat the procedure for the second and
third nut.