D3D v18.08 Quality Control

Main issues:

Extruder

• Nozzle not flat to heater block
• Heat break not tight against nozzle - nozzle not tightened
• Heat break not tightened by hand into heat sink and heater block touching plastic
• Teflon tube not bottomed in extruder
• Magnets slowing down cooling motor
• 161.3 steps per revolution - 100 used instead
• Nozzle size incorrect (.4, not .5)

Z height

• Nozzle on bed, extruder clogged
• Calibration done with cold bed, slightly off
• Platform slanted

Axes

• Belt plug in wrong hole
• X axis tightened before mounting on Y axes
• Motor shafts touching frame, stalling
• Balls knocked out of linear bearing

Motors

• Set screws not tight on sprocket
• Sprocket not at the correct position on shaft
• Belt not around motor pulley, but around plastic of motor piece

Frame

• Z axis holes not lined up
• Edges not welded touching one another
• Corners of sides not lined up

Controller

• Unplugged with motors energized
• Plugs misconnected (3 of 4 pins on)
• Faulty Arduino (2)
• Faulty RAMPS (2)
• Faulty screen (2)