Installation of the arm assembly on the frame
This is where your XuGong finally starts to take shape. Assuming that you mounted the rubber
dampers on the upper frame plate earlier in this procedure, you can drop the arm assembly onto
them, and start the process of pulling them through the plate.
Run the servo cable bundle, and the naza power cables, through the hole in the top frame for
later hookup. The battery cables should be run through the gap between the top frame plate, and
the power plate, at the rear of the assembly.
For the first time mounting this plate, there will almost definitely be some cursing, but trust us, it
gets easier (our record is 60 seconds to get them all installed).
The easiest way to mount them is to start at the front, apply downwards pressure on the top
plate, while teasing the dampers through the holes in the power plate using a small screwdriver,
or ideally a pair of angled tweezers. Once part of the damper is through the hole, it is possible to
pull the rest through from the top.
Motor Installation
Mount the motors on the ends of the foldable arms using the spacer plates supplied, and
M3x8mm screws.
Warning: Ensure that the screws are not too long, and will touch the motor windings. This will
destroy the motor, and will potentially create a short circuit between motors on the conductive
aluminium arms.
Tip: For builds using the standard DJI motors, and standard DJI ESCs, it should be obvious at
this point that the motor wires are too short, and won’t reach the ESCs.
For the shorter wires, the easiest way to extend them is to remove the heatshrink over the
bullet connector, unsolder the bullet, and solder in a length of suitable siliconecoated wire
before applying heatshrink to the joint, and the bullet.
Be sure to carefully select the length of the wire so that when installed, the arm can pivot
correctly to fold the motors into the center of the frame. On the other hand, ensure that there is
not too much cable ‘dangling’ under the arms, and possibly getting wrapped around the props.
The cables should go on the opposite side of the rotation, to avoid getting pinched between the
arms. Front arms fold in from the front side, rear arms fold in from the side.
Another alternative is to eliminate the bullet connectors altogether, and directly solder the
motors to the ESCs. For a very robust installation, eliminating as many connectors as
possible is a good thing.
