Power on the printer to preheat it. Preheating can take up to 10 mins so if you do this while you are working on or prepping your model you will save time.
It is always important to monitor your machine while it is printing in order to catch any errors or malfunctions as quickly as possible. Should a problem occur, however, remember that the printer plate is very hot, so do not touch it until it has cooled down. In general, keep the door closed until the printer is fully cooled. Opening the door while printing will disrupt the job and drop the temperature, possibly leading to print failure.
Depending on the generation, MakerBot printers have a variety of control panel configurations. Where there’s a D pad (directional control pad), the M button in the center will select whatever option is highlighted, left goes back through the options, while up and down scroll through the menus. Others, such as the Replicator, have an LCD display and a dial.
On the MakerBot Replicator 2X, scroll down the initial menu and select Preheat. On the next screen, you will see the option Start Preheat! Check that the Right + Left Tools and the Platform are all ON. Select Start Preheat! You will see that the Platform heats up to 110 degrees while the L + R Extruders wait. When the Platform is close to the right temperature, the extruders will begin to heat.