Assembling the chassis

Take the Zumo chassis kit and open it. Make sure you have all components as listed in Zumo chassis user guide. Discard the acrylic plate - we wont’ be using it.

Now follow these steps:

  1. Turn the chassis upside down. Remove the cover from the battery compartment of the chassis and insert the double battery contacts in the slots as shown in the photo below, paying attention to orientation. Leave two single contacts for later.

  2. Insert 4 M2.5 screws from Yozh kit in the holes as shown in the photo below. It should be a tight fit – use a screwdriver to drive the screws all the way in.

Chassis assembly 1

  1. Turn the chassis right side up. Attach the idler sprockets following the directions of Zumo user guide.

  2. Insert the motors with leads in the channel at the front of the chassis, aligning the gearbox with the grooves in the channel. The front plate of the gearbox should be even with the edge of the chassis. The motor leads you had soldered previously should be facing up.

    (Tip: place a pencil under the center of the chassis)

Chassis assembly 2
Chassis assembly 3

  1. Take the spacer PCB and place it on the chassis, carefully threading the motor leads through the holes in PCB. The screws you had inserted should match the holes in the spacer PCB. Warning: spacer PCB is not symmetric - pay attention to This side up marking.

Chassis assembly 4

  1. Repeat the same with the main board. Make sure that this board lies flat against the spacer board, with no gaps anywhere.

  2. Tightly screw the 22mm M2.5 standoffs from the Yozh kit onto the screws protruding through the main board.

Chassis assembly 5

  1. Put the silicone tracks on wheels (requires a little effort).