Slip the motor controller over the screws as shown in
Figure 14. If the controller won’t fit over the screws,
loosen them a little. Once in place, tighten the screws
from the underside of the chassis. Add a #2-56 nut to
each of the screws and tighten. Pay particular attention
to the orientation of the board.
Cut four pieces of 18-20 gauge wires to 3” in length.
Solder them to the motors and add some heat shrink as
you can see in Figure 15. Strip about 1/4” of the insulation
from the other end of each wire.
Referring to Figure 16, attach each of the motors to
motor mounts. Use two M2 x 3. 5 mm machine screws to
secure the motor.
Slip the two press-fit gears over the motor shaft as
shown in Figure 17. The outer gear should be flush with
Use two nylon #6-32 x 3/8” machine screws and hex
nuts to attach the motor mounts to the chassis as in
Insert two washers over the idler axle. Next, slip two
of the idler gears over the axle. Then, add two more
washers and secure with a #6-32 nylon lock nut as shown
in Figure 19. The nut should be loose enough to allow the
gears to turn freely. Do this on both sides of the chassis.
Insert two #6 washers over each of the six wheel axles.
Insert an assembled wheel over each axle. Be sure the inner
support hub is in place, then add two more washers and
secure with a nylon #6-32 lock nut (refer to Figures 20A
and 20b). The nut should be loose enough to allow the
wheel to turn without binding.
Attach the motor wires to the terminals that are
located on its same side as shown in Figure 21. Don’t
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