• CAD design of chassis, base, body and user interface panel

• Single 2mm carbide milling tool

• Material 12, 6 and 3mm plywood

• Machining tool paths calculated from drawing vectors, tool size and material dimensions

• Tool paths checked using the CAM simulator

• 3D pan and tilt gives an overall view of how the finished parts will look.

• Tool path data downloaded to the CNC controller

• Material size, thickness and tooling set up

• CNC Machining of parts to an accuracy +-0.025mm

• Finished parts

• Base and Chassis assembly

• Delrin chain drive from axle to encoder shaft

• Steel wheels and cast white metal axel boxes

• User interface panel and micro controller assembled into the wagon body

• Low cost micro controller using the ATMEL ATmega328 chip

• Optical quadrature encoder salvaged from an old PC mouse

• Resolution of 65 pulsed per revolution

• Dynamic C++ code

• Easily expandable to include any extra features that the customer may ask for such as speed measurement and data logging with connection to a PC via the USB port

• Initial test of the software, reading the outputs of the encoder and displaying pulse count and direction information

• Simple and uncluttered

• Clear LCD readout of distance in several formats

• 2 button menu system