Build a DR4B robot need lots of c-channel, so we were finding new design that use less c-channel, therefore we can build the third robot, then this idea hit my mind some days before. We were wondering whether it works or not.
There was a thread on this a few months ago.
@Download Complete There was a thread on this a few months ago.
It is very similar idea. The 30 tooth sprocket and 15 tooth tank sprocket is the only pair that is ratio 2:1 I can find.
I made try, the 30 tooth sprocket is too large.
Interesting idea, however I would be concerned about gears slipping... which is why a dr4b is used more often. It a), has a little more height than this, b) has a lower chance of slipping, and c), I can't think of a way to tension this. However, you can try as I have not seen something like this before.