Mechanum Wheels for Antweight (150g) Robots

Last crawled date: 4 years, 3 months ago

A set of 4 mechanum wheels plus rollers designed for UK antweight (150g) combat robots.
The wheels have a diameter of approximately 45mm, and are designed for a 3mm D-shaft which will press fit onto the typical N20 motor used in the weight class.The wheel is printed in two halves with the outer faces lying on the print surface, with supports enabled (touching buildplate only). No supports are required for the wheel hubs.
The rollers STL file contains 8 rollers, to fit one wheel. You will need to print 4 copies of this model to supply all 4 wheels.
--- Assembly (per wheel) ---
Additional materials: 1mm brass rod, hot glue gun, N20 motor
1) The wheel should be assembled on the motor. Attach the inner half of the wheel hub (the side with the thinner spokes) to the N20 motor first - the motor should be slightly recessed into the wheel hub.
2) Attach the other half of the wheel hub. The grooves for the rollers should line up with the inner half - the roller supports should be on the outside of the wheel.
3) Cut 8 sections of 1mm brass rod to use as axles for the rollers. Slide each section through the inside roller support, through a roller and into the corresponding support on the outside.
4) Use a hot glue gun to seal the brass rods inside the wheel by placing small blobs of glue over the inside roller support hole, taking care to not get any glue on the rollers, or in the gearing of the motor.