Testing and Printing - Printing in Plastic: Build Your Own 3D Printer - page 383

Press the Commit Changes button and your changes will be made and the axis will be inverted. Test
the axis again to confirm that the axis is traveling in the correct direction.
In summary, test each axis for the proper direction of movement, invert when necessary, and
remember to use the Stop button if you must!
Homing the Machine
Now you will “home” the machine by finding and setting the default starting location for each of the
three axes of movement (X, Y, and Z). Double-check the connection of the endstops (limit switches) by
pressing their levers. The red LED should light up as you can see in Figure 20-13.
Figure 20-13. Test each endstop by pressing the button and looking for the LED to light.
Go to the Homing menu shown in Figure 20-14 and select an axis to home.
Figure 20-14. The Homing menu allows you to home each axis separately.