Just curious... did you make any progress in making the gearbiox smaller? WIth only two cam-shafts?

Wow! this is great! Using cams is a brilliant idea. I liked Sheepo's 7+R gearbox (I assume you've seen this)but It uses a lot of rubber bands that never worked reliably for me. The cams avoid that. I can't wait to try this design, but I am a few cams short. I've also got a idea on how to add another dog ring to the gearbox using a similar method. Could you post a few pictures of the position of the cams in each gear setting? I want to be sure I know the order they turn in. Thanks, and good work.

A pretty fresh thought in the Lego gearbox world... or at least, I haven't seen anything similar. The one problem is that it's not a perfect R/C-Solution, as there's no stop upon a gear shift, correct? Otherwise, a pretty cool concept, and so far the most compact solution I'm aware of that utilizes multiple gear rings with a single shift motor. Keep up the great work!

I'm afraid a six-speed box using this method would need more than just six-holed cams, the problem is the shape has to be just right. The cam needs to be able to move the lever forwards, backwards and (the difficult bit!) back to the centre-position. I will have a go at re-working the gearbox to save space, I have an idea using only two cam-shafts that might be smaller...

Wow, a small step for you, but a great step for AFOL-kind! I wonder if this could be upgrade to a six speed box, by using the smalle belt wheels with six holes. Great work, gear boxes just keep me puzzled, mostly on how to make a solid gear shifting device. This way it is pretty easy. Only drawback seems to be the amount of space it takes.