First Print with the Simple - 3D Printing: Build your Own 3D Printer and Print your own 3D Objects - page 94

Figure 5.14 Press the Set Home button when the hot end is in the right location
for starting a print job.
After clicking the Set Home button, you should see that the values for X, Y, and Z
on the Print Table change to 0.
Now it's time to print.
Print!
Before clicking the Run button, perform a last-minute check. Switch to the Tem-
perature Curve image and verify that the temperature is where it needs to be. Click
the g-code button (to the left of the Print Panel button) and verify there is actual
g-code there from the object slicing tasks. Finally, verify that you've homed the
nozzle. It should be in the front-left corner and almost touching the print bed sur-
face, and all three axes should have values of 0 on the Print Panel.
Take the end of your filament, clip it off at an angle to provide a sharp point, and
feed it down through the extruder and into the hot end. When the filament is inser-
ted properly into the hot end, lock down the extruder to put pressure on the fila-
ment so the extruder motor can feed it in on its own.