Before starting to print, check the following:

• The hood is closed.
• The flat surface of the build platform is clean and free of all cured material, and the build platform torque knob is tight.
• Inspect the quality of the domeless material tray before each print.
• The material tray is secured in position and the material tray torque knobs are tight.
• The material tray is filled to the fill line, and all material handling instructions are followed for the specific material used (mixing, temperature, etc.)
• The material tag is in the material tag reader, and the tag matches the material in the tray and in the build style.
• The oxygen concentrator is supplying pressure.
  The pressure gauge should read between 0.05 and 0.80 PSI when ready to start a print.