Step 1

Components Required

Dismantle two screws As shown below:

Insert polish rods into the bearing

Assemble the dismantled component again

Synchronous Belt

GT2

Loosen two clap plates

Make a synchronous belt go through the right clap plate and fix them together

Then make it go through the synchronous wheel

Hang the synchronous belt on the synchronous wheel of right motor

Then make the belt clamber onto the right wheel(as shown in the graph)

Then hang on the upper one (as shown in the graph)

Then clamber on the left one

Go through the left driving wheel of the left motor

Next, pass through the lower left synchronization wheel

At last, pass through the clap plate with the the other end of synchronous belt and lock it tightly

Wiring up

Left motor

Wire up the left motor

You need to interface the servo with the control board using extension Dupont wires

Adjust the servo to initial angle

Pull the pen holder out

Rotate the servo anticlockwise until it stuck(the state that rotation is restricted)

Then fix the pen holder onto the sliding trail

Hold a pen

Rotate the knob anticlockwise

Put a pen and adjust it at a proper height. Then lock it tightly