Chassis
The new chassis replaces the default wheels of the Arduino Robot.
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So, in the first step the original wheels will be removed
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Then a shaft will be mounted to extend the motor shaft.
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The mounting will be done with two bearing, which will be connected with the motor board.
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The new wheel sits at the end of the shaft.
And this will be the wheel, either made from 2mm alu or stainless steel. Probably alu, steel is quite expensive.. And hopefully I will find a company which can cut it with a CNC machine, otherwise I will have to do it by hand!
Now, this is how I actually built the Chassis:
I used a brass tube as axle. To connect it with the gear box, I "forged" it with a hammer to match the form of axle of the gear box.
On the other end I inserted a threaded rod in the tube and also hammered it to form a primitive thread which holds the rod in place. I fixed the wheel with simple screw nuts.
For cost reasons I decided to use plastic trivets. They are 1€ each, compared to about 40 for a professional wheel of the same size not bad. First tests showed that they are stable enough. I had some great support by my sons, Adrian and Timon:
During the shooting for the video at the end of the original implementation period, the chassis broke down. The cable binders did not keep the wheels and bearings in place, so the slipped out and the robot broke down.
So I decided to rework the chassis and switched to heavy metal.
These are the components:
I mounted rubber (by means of double-sided conducting tape) on the metal, on the big part to prevent electrical shortcuts, on the small parts to increase height and mechanical friction.
Chassis version 1.1 (still some cable binders):
To the right, the excenter weight can be seen.
Nearly done:
No more plastic cable binders, but screws and pipe clamps (not sure if this is the right term):
Next: Conclusions