Combining the Chassis

Start 

The plural of chassis is indeed Chassis. In this section, we will be attaching level two to level one.

Modules 

Gather the following parts to complete this project.

Parts

All Parts
All Parts
M3 10mm Machine Screw
Red Male-to-Male Jumper
Black Male-to-Male Jumper
Cable
PartQuantity
M3 10mm Machine Screw 4
Red Male-to-Male Jumper 1
Black Male-to-Male Jumper 1
Cable 2

Adding the Cables 

Before we attach the level two chassis, we must place cables back into the black base shield. Plug in one side of a cable for the I2C motor driver and use another cable for the I2C servo driver. So that's two cables in two I2C sockets.

All the cables we'll need
All the cables we'll need
Taking the free one
One end into I2C
Nice
Grabbing the new one
Magic unwrap
One end into I2C
Done

Routing the Cables and Wires 

Below are the recommended spots for routing all wires and cables coming from the level one chassis. Pulling the cables through and routing them this way makes sure that no wires or cables interfere with the drawing mechanism. Feel free to choose your own routing method as you add additional modules, or purely for aesthetics.

Routing placesRouting places

Screw Together 

Line up the level two chassis with the standoffs. The arrows etched into the level two chassic should be on the same side as the battery pack on level one. Tighten a M3 10mm screw into each one.

Levels one and two
Levels one and two
Take level two
Place on top
Route cables and wires
Get the M3 screws
Take a screw
Place in mounting hole and into standoff
Tighten
Repeat
Repeat
Repeat
Done

Reattaching the Wires 

Place the red wire from the battery holder into the VS terminal found on the same side as the socket on the I2C motor driver. Place the black wire from the battery holder into GND in the same terminal block. Tighten both terminal screws.

Take battery wires
Take battery wires
Plug RED into VS
Plug BLACK into GND
Tighten
Tighten
Ready for next wires

Place the red wire coming from the left motor into the M2+ on the I2C motor driver. Place the black wire from the left motor into the M2- in the same terminal block. Tighten both terminal screws.

RED motor wire into M2+
RED motor wire into M2+
BLACK motor into M2-
Tighten
Tighten
Ready for next wires

Place the red wire coming from the right motor into the M1+ on the I2C motor driver. Place the black wire from the right motor into the M1- in the same terminal block. Tighten both terminal screws.

RED motor wire into M1+
RED motor wire into M1+
BLACK motor into M1-
Tighten
Tighten
Done

Attaching the Cables 

Place one cable coming from the I2C sockets into the I2C motor driver. Place the remaining one into the I2C servo board.

Ready to plug in the cables
Ready to plug in the cables
One I2C
Into Motor Driver
Other I2C
Into Servo Driver
Ready for next step

Jumping the Power 

Grab the red and black male-to-male jumper wires. Unscrew the VS terminal screw just enough to fit one end of the red jumper inside. You should have both the jumper and wire inside the VS terminal. Re-tighten the terminal screw. Next, unscrew the GND terminal screw just enough to fit one end of the black jumper inside. You should have both the jumper and wire inside the GND terminal. Re-tighten the terminal screw.

Parts for this section
Parts for this section
Unscrew VS a little
Fit in jumper
Re-tighten
Next one
Unscrew GND a little
Fit in jumper
Re-tighten
Both jumpers in

Hold the red jumper by the wire of the free end and not the black casing. Press down on the orange button on the 5V side of the blue terminal block on the I2C servo driver. Push the jumper inside then let go on the orange button. The wire should stay in even with a little tug. Hold the black jumper the same way. Press down the orange button on the GND side of the blue terminal block and push the jumper inside.

Hold red jumper by wire
Hold red jumper by wire
Press down button
Insert
Release button and tug
Hold black jumper by wire
Press button
Insert
Release and tug to check
Done

Attach the Servo Cable 

The servo cables goes to one of the headers on the I2C servo driver. It is going on the set of three headers closest to the GND terminal. Insert the cable into these three headers with the orange wire in the cable facing the middle of the chassis.

Take servo cable
Take servo cable
These headers
In slot one
Orange wire
Facing in
Done

Next Section 

Level two is attached and wired up. The next section will cover making the pen mount.