The previous wheels had the problem that the wheel hub was able to slip inside the silicone cast. If this would happen while the robot is pushing this means we won’t be able to utilize the full pushing force of the robot. With this in mind we designed new wheels in FreeCAD. Fortunately we had some silicone left over that we got from VOSSCHEMIE.
As we mentioned before one of the most important parts of the robot are the wheels. The wheels are needed to transfer the motor power into pushing power. Without good wheels the wheels will slip and the motor power will be useless.For this reason we will make our own custom wheels with silicone rubber from VOSSCHEMIE.
It all starts by designing the wheel in 3D, for this we use FreeCAD.
To cast the wheel we need to have a mold for this we also use FreeCAD.
Next step is to 3D print everything.
Now we can finally start casting the wheels. For this we use 2 part silicone: SICOVOSS from our sponsor VOSSCHEMIE. Part A and B need to be mixed in a 1:1 ratio by weight. First we calculated the needed volume to fill the mold and calculated the desired mass we needed to fill the mold.
And then the mess could begin!
And here is the result after waiting a long time, the de-molding time would be between 6-7 hours but for this cast the time needed before be-molding took much longer. Probably because of the pigment used.
Final result !!
Thanks again VOSSCHEMIE for being our sponsor for the second time in a row!!!
You may have a fast, smart and powerful robot. But none of this makes sense if your robot doesn’t have good grip on the arena. For this purpose many sumo robot builders cast custom rubber wheels or buy special wheels from the internet.
We wanted to make our own custom wheels and for this we teamed up with Vosschemie Benelux.
Vosschemie was already a sponsor for our previous robot, the wheels of the previous robot didn’t had any slip and they were even able to stall the motor. Because they offered so much grip we adhere to the silicone of Vosschemie Benelux.
The wheel making process for the wheels from the previous robot.
Today I went to Vosschemie Benelux in Lier to pick up the new sponsorship. We even got some green pigment to color the wheels.
Thank you very much Vosschemie Benelux for willing to be our sponsor again!!