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Bengt Ilon invented this wheel concept while working for the Swedish company Mecanum AB in the early 1970's.
A Mecanum-style drive base uses 4 wheels, including 2 "right" wheels and 2 "left" wheels. One right and left is on each side of the robot. Each wheel is driven independently, therefore a Mecanum-style drive base must have 4 independent motors (and gearboxes, if used). For more information on Mecanum drive methods, see the Wikipedia site on Mecanum wheels.
STRUCTURE:
The AndyMark version of the Mecanum wheel utilizes 2 bent sheet metal plates with rubber rollers captured between the plates.
SIZE:
We offer 6 inch, 8 inch and 10 inch diameter wheels. All of these wheels have the rollers positioned at 45 degree angles. This design enables the wheel to propel a vehicle forward, backward, and directly sideways.
Load Capacity (each wheel)
6" Wheel: 40 kg (88 pounds)
8" Wheel: 80 kg (180 pounds)
10" Wheel (steel body): 150 kg (330 pounds)
10" Wheel (aluminum body): 50 kg (110 pounds)
Coefficient of Friction
These are the coefficient of friction constants, as tested on tight pile carpet:
- 6" Mecanum Wheel: 0.6 static forward/reverse, 0.5 sideways
- 8" Mecanum Wheel: 0.7 static forward/reverse, 0.6 sideways
- 10" Mecanum Wheel: 0.54 static forward/reverse, 0.41 sideways
The 6" Mecanum wheels utilize 16 rollers positioned between 2 steel plates.
The 6" Mecanum HD wheel utilize 15 rollers positioned between 2 plates.
The 8" Mecanum wheels utilize 12 rollers, positioned between 2 aluminum side plates. These wheels are delivered in kit form, unassembled.
The 10" Mecanum wheels utilize 12 rollers, positioned betwen 2 plates. The steel version has a tubular hub on the interior.
Wheel Weights
- 6" Mecanum Wheel: 1.3 pounds
- 8" Mecanum Wheel: 2.5 pounds
- 10" Aluminum Mecanum Wheel: 7.8 pounds
- 10" Steel Mecanum Wheel: 14 pounds
Specification sheet for AndyMark Mecanum wheels (.pdf)
Patent #: 7641288
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