O.A.R.: Mechanical Side

Mechanical Side

by Cory and Mark

Some recommended things to consider when building a robot according to www.societyofrobots.com

Use few and simple parts
Use few types of screws
Use off the shelf parts when available
For frame use aluminum or HDPE (high density PolyEthylene)
Large wheels provide low torque but high velocity
Servos have good torque so you can use large wheels
Use wheels that are larger that your motor diameter for clearance underneath
Use simple differential drive
Motors: servos provide easier control, but are less energy efficient; motors can take harsher treatment and are efficient and powerful
HDPE: cheaper than aluminum, lightweight, easily machinable, recommended for use on the base of the robot where you mount everything, do not use in wear is expected, it is soft, do not tap it is self tapping, do not use if you require highly rigid strength
Aluminum: very strong, light, resistant to corrosion, affordable, easily machinable, higher strength to weight ratio than steel