Step 7: Mount the motors and pulleys
motor data sheet from SparkFun indicates that the motor mounting holes are
31mm apart in a square, with the shaft at the center. Make pencil marks up
on the corners of your board where you want the motor shafts to go, and
then measure and make marks at each corner of a 31mm square centered on
that motor shaft mark. Plan your motor mount so one motor is in each of the top corners of your canvas.
Use the 1/8 in drill bit to drill out the clearance holes for the M3 screws the
motor will mount with. Use the 3/8 in drill bit to drill out the center hole. Remove the screws that came with the motor from the shaft side so we can use those holes as mounting holes with the longer screws. Now mount your motors with the M3 screws, lock washers, and washers creating a sandwich with your canvas board. You may need fewer washers, depending on the board thickness you’re using.
Once both motors are mounted, confirm the circuit still works as intended and
none of the wires in your circuit have come loose. Press the pulleys onto each