Rotacaster Omni-wheel Grip Tests

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I received a parcel from Rotacaster Pty. Ltd. a fortnight ago which contained a new set of4x Rotacasters with the new Black Hub-centres and S55A Hardness type Orange Rollers and a set of 3x Rotacasters with the new Black Hub-centres and S45A Hardness type rollers. The S45A’s roller colour is a perfect match for Lego’s “Dark Bluish Gray” colour scheme.
I was excited about testing the new wheels using softer durometer materials on the rollers. The S45A do provide better traction, which should be especially good for lighter robots. The S45A compound is very similar to the white oblong type pencil rubbers.

I decided to try and demonstrate the difference in the grip between the new ‘S45A’ and the older ‘S55A’ Type Roller Compounds. I built the two test rigs with the axles fixed so the wheel couldn’t role to preform the demonstration. I used a sheet of ‘Melamine’ Whiteboard which is as slippery as glass placed at a gradient of 45 Degrees for the Rotacasters to slide down.

Rotacaster Omni-wheel Grip Demostration

As can be seen in the Video above, the S45A out preforms the S55A even when a 55g Lego Boat Weight is added to the two rigs. The down side to the S45A Rollers is that they probably won’t ware as well on abrasive surfaces, unlike the S55A.

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