TOM Tri-Track dual servo robot tank chassis

thingiverse

This Tri-track frame design, originally by Ktronics (available at http://www.thingiverse.com/thing:14599), has been updated for Thing-o-matic printing convenience. The new version splits the frame into three parts that can be bolted together. Modifications include drive wheel holes for servo mounting, and frame mounting holes for servo mounts. Additionally, the servo mounts have been altered to fit CSRC-311 servos exactly. A video demonstration is available at http://youtu.be/hBeYp6AdOhc. The accompanying "Stationary.ino" Arduino sketch reads distance from two PING sensors and performs obstacle avoidance; the robot, named Stationary due to its former lack of a brain, thus remains stationary until necessary movement is detected. To print, create the following components: 2 Tri-Track frame end segments, 1 middle segment, 42 track sections, 2 drive sprockets, 4 idler sprockets (608), and assemble with 42 M3 x 45mm socket cap bolts, 42 M3 nylon-insert hex locknuts, 8 M3 x 15mm socket cap bolts, 4 M3 x 20mm socket cap bolts, 6 M3 x 25mm socket cap bolts, 32 M3 washers, 4 M4 x 16mm socket cap bolts, 8 M4 washers, 2 M8 x 160mm threaded rods, 20 M8 hex nuts, and 16 M8 washers. McMaster-Carr provides all hardware requirements online.