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Unread 02-01-2012, 21:58
Andrew Lawrence
 
Posts: n/a
Re: Simple 2-Speed 6WD for teams with few manufacturing resources

Quote:
Originally Posted by apalrd View Post
What are you calculating the ratio with (What reductions in each stage, and what motor free speed, and speed loss constant?)

I get 3.86 and 9.86 ft/sec with no speed loss and 5310 CIM free speed, for reference.

The stages of reduction are:
12:40 CIM->cluster shaft
15:48 OR 28:35 cluster shaft->shift shaft
16:36 chain

It seems like a lot of chain reduction with 4" wheels. The ratio chosen seems to be perfect for 6" wheels (5.79 and 14.83 ft/sec with no speed loss, 4.69 and 12.01 with speed loss, 46 amp wall-push in low gear)
Well that seems kinda low. My 22 fps is definitely wrong, and I've unfortunately lost the paper I used to calculate it (off to clean my room now!).

Madison, is Apalrd right? This looks like one of the best kitbots I've seen, but 10 fps and 3 fps are not my cup of tea. :|