There are two steps to hardware calibration:
- Level the bed
- Level the hot ends
- A standard piece of A4 copy paper (these are approximately 0.1mm thick)
- A 2.5mm hex key for M3 SHCS bolts
For the calibration process, we recommend connecting your AON directly to a computer and controlling it via Simplify3D.
Power on your AON, open up the Simplify3D application, and use the USB cable to connect your AON to your computer. Simplify3D should connect to your AON automatically.
In Simplify3D, navigate to Tools>Machine Control Panel, and you should see a popup window like the one shown in the picture below:
If your AON has not automatically connected, ensure that the baudrate is correctly set to 250000, or double check that you have correctly installed the drivers.
By hand, move the Y gantry towards you, and move the toolheads to the side so that the hot ends are not above the bed. If the motors have turned on and you cannot move the axes by hand, press the "Disable Motors" button in the machine control panel located on the right-hand side.
In the machine control panel window, press the "Home Z" button located near the bottom.
With the borosilicate build plate placed on top of the aluminum heated plate, take the left toolhead (Tool 0 or T0), and move it to the front-left corner of the bed. Using the piece of paper as a thickness gauge, use the wingnut located under the bed to adjust the height until the paper just catches between the nozzle and the build plate ie. you should be able to slide the paper freely around, but feel some friction.
Repeat this process for the other 3 corners of the bed.
To level the hot ends, bring the two toolheads together close to the centre of the bed. Determine which nozzle is lower than the other. If they are located at the same height, you're done!
If not, whichever nozzle is higher will need to be brought down. Using the hex key, loosen the shaft clamp holding the hot end in place, adjust the height so that the tip of the nozzles are in the same plane, and then re-tighten the shaft clamp tightly.
Whenever you change out the nozzles, you will need to re-level the hot ends as the location of the nozzle tip will have changed.
You're ready to move on to the next step of calibration and the first test print.