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The C Shore

Robo-Car Physical Assembly

Step One

Set up a clean area to assemble your Robo-Car. You should have:

  • A chassis board(board on which we will build the Robo-Car)

  • A kit of the parts you will need (supplied as needed)

  • A small screwdriver


Follow the directions below. Do not go onto the next step until you have finished the step you are on. If something does not look right, call a team leader.

Step Two – Attaching the UBEC (new parts)

(The UBEC is a power supply that we will use to power the Raspberry Pi)

Get your chassis board.

photo of chassis board top ith wires, UBEC, and battery holder
CHASSIS BOARD TOP
photo of chassis board bottom with wires and bottom of power switch
CHASSIS BOARD BOTTOM

Get the UBEC tie down strap (rectangle with 2 holes) and two 2.6 mm (thin) bolts with nuts.

UBEC tie down strap

Place the UBEC on the top of the chassis board between the two mounting holes. Push the two bolts through the holes on the strap and then through the two holes on the chassis board. Secure the bolts underneath the chassis board with the two nuts. As you tighten the nuts the UBEC will be held in place by the strap. (See picture below)

photo with arrow pointing to UBEC

STOP – Wait until directed before going to the next step

Step Three – Attaching the Motor and Wheels (new parts)

(The motor and wheels will move your robo-car)

Get the two wheel assemblies. Each assembly is made up of a wheel, a yellow motor, an attached mounting plate and two attached wires. You also need two 3.5 mm nuts(thick) and bolts.

photo of motor assembly

Bolt the two motor/wheel assemblies, one to each side of the rear underside of the chassis board. Use 3mm nuts (thick) and bolts. Two bolts per wheel assembly. (See picture below)

photo of motor assembly attached to chassis

On the underside, feed the red and black wires from each motor through their respective holes to the top of the chassis board. (See picture below)

photo showing chassis undersid with wires feeding through to top

STOP – Wait until directed before going to the next step

Step Four – Attaching the Caster Wheel (new parts)

(The caster wheel allows to Robo-Car to move in any direction)

Bolt one caster wheel to chassis board, front underside using 3mm bolts (thick) and nuts. Two bolts per wheel assembly. (See picture below)

photo of caster nylon caster wheel
photo of caster wheel attached to chassis (bottom view)

STOP – Wait until directed before going to the next step

Step Five – Installing the Motor Controller (new parts)

(The motor controller uses computer control to send power to the wheels)

Bolt the motor controller to the middle upper side of chassis beside the UBEC. Push the four bolts gently through the four holes on the top of the chassis board. On the underside use four 2.6 mm (thin) nuts to secure the controller. Do not over-tighten the bolts. (See picture below). Note: cooling fins (black) are towards the batteries.

motor controller with parts pointed out

STOP – Wait until directed before going to the next step

Step Six – Installing the Raspberry Pi (new parts)

Bolt the Raspberry Pi lower case to the chassis in front of the motor controller using two 2.6 mm bolts (thin). Ensure the case is positioned so that the GPIO pins are towards the batteries. Gently insert the Raspberry Pi and carefully snap it into position. (May need help from team leader.) If done correctly it will not fall out, even if the Robo-Car is turned upside-down. (See picture below)

photo of Raspberry Pi case attached to chassis

Step Seven – Assembly Finished

At this point all the major parts are fixed to the chassis board. (See picture below). Now for the wiring.

photo of top side of robocar with all components attached to chassis

STOP – Wait until directed before going to the next step