Well, the hubs are now completed and fit the main body really well. It didn't take very long to assemble and stick them together and then I assembled the whole mechanical side of the Trundle 2 for the first time. I know I'm biased but it looks terrific and balances really well. Next job is to load the continuous rotation sketch onto a Duemilanove and try a simple run.
This is a completed hub. The reason for building them this way is to produce a modular system for test purposes (initially) and so be able to swap drive systems and bodies around.
One view of the completed Trundle assembly. The body is, as yet, just a tube with no additional holes or parts added. In time I may insert a shelf so that the battery can sit in the lower part and the electronics in the upper. Also, there may be holes cut for sensors or parts mounted on the outside of the tube. A new set of hubs might have a motor drive rather than a servo. By using different hubs and bodies, the system becomes a 'Mix and Match' concept.
Behold, the Trundle Mk2.
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