FingerTech Mecanum Wheels (Set of 4)
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FingerTech Mecanum Wheels (Set of 4)

Price: 94.59 CAD
68.94 USD 61.91 EUR
In Stock: 0

• FingerTech's Mecanum Wheels allow any robotics enthusiast to add omni-directional capabilities to their creation.


• The new upgraded version is all-metal construction for maximum strength.


• Precision engineered aluminum hubs and rubber rollers with a customizable mount for any motor shaft size between 3mm - 6mm (0.118" - 0.25").


• Set includes four competition-grade wheels (two "A" side and two "B" side), a 1/16 hex wrench, and instructions for installing and controlling the wheels.


  • Description
  • Specifications
  • Pictures & Video
  • CAD Files
  • Reviews
 




Kit includes:
Four Mecanum wheels (two A-style, two B-style)
1/16 hex wrench
Instructions








What can they do?
The four Mecanum wheels are each connected to a separate motor with independent control. The robot can move forward, backward and turn just like it would with four regular wheels. The configuration of rollers at 45° also allows the robot to translate sideways, and through a combination of movements, drive in any direction - even while spinning!

How do they work?
Adjacent corners of the robot use mirrored wheels so that they can freely roll outward from the center. This splits the force into two vectors, one forward/backward and one right/left. When the wheels on one side are spun in opposite directions, the forward and backward vectors cancel out while both sideways vectors add up. Doing the reverse with the other two wheels results in four added sideways vectors.

How do I drive?
Control can be accomplished with a microcontroller or simply using an R/C transmitter! You can use two channel mixers, a 4-channel Mecanum drive mixer, or your own programmed PCB. 
Examples & code: how-to_mecanum.php (coming soon!)


The guys over at Robot Logic have put together an R/C Mixer for Mecanum Wheels.  Now control your omni-directional robot with just 3 channels of your transmitter!  The right stick is used for translation left/right/forward/back while the left stick is used to spin the robot.  This gives you a super simple method of driving your robot!  Combine this with a heading-lock gyro (common in R/C helicopters) for rock-solid operation!

 Specifications:
Hub plate material: Anodized 6061 Aluminum
Roller material: EPDM 50-60D(A) Rubber
Outside wheel diameter: 54mm (2.125")
Wheel width at widest point: 34mm (1.3125")
Customizable mount bore: 3mm (0.118") - Can be drilled to any size up to 6mm (0.25")
Weight: 60grams (2.12oz) per wheel
Capacity: 0.5-13kg (1-30lb) robot.

Load Specs:  (showing load ratings from previous wheel version. V2 wheels would be similar.)
Testing a 1.36kg (3lb) Mecanum robot pushing against another unpowered robot equipped with Foam wheels:
Pushing Forward, the Mecanum robot easily moves 66% of its own weight and can slowly push 100%.
Pushing Sideways, the Mecanum robot can easily move 33% of its own weight and can slowly push 66%.






 
1 Product Reviews - Average rating 3 / 5 (Show All)

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Light and sturdy, only one flaw...

- 21st August 2014

These wheels work great on hard surfaces and when mounted PERFECTLY level. If you are off-axis at all, then the e-clips on the sides holding the rollers on contact the ground and jump off, causing the roller and axle to come out and jam your whole mechanism. We demo a small mecanum vehicle for potential robotics students at WPI, and we lose them at a rate of around 2/hour. It happens all the time on carpet too (regardless of mounting tolerance), because the fine hairs grab the clips and pull them off. [FT: We hear you and will design a screw-end shaft set!]

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