pic: Dual Fisher Price gearbox

[vivek16]

With a 176.16:1 reduction it would be about 89 RPM.

-vivek

[vivek16]

IMO, I think it's too big, PM or IM me if you want some tips on reducing the size.

No offense, but I can't really see there being room for it on a robot right now.

just my two cents, vivek

[R.C.]

Originally Posted by vivek16

IMO, I think it's too big, PM or IM me if you want some tips on reducing the size.

No offense, but I can't really see there being room for it on a robot right now.

just my two cents, vivek

Agreed, IM Vivek, he has some good ideas up his sleeve .

With your material costs there, I'd highly recommend looking at the new GEM500 planetaries from Andymark. They'd probably end up cheaper with 4 stages, which would give you a 189:1 ratio (I think).

Out of curiosity, what made you go with that shape?

[kajeevan]

Originally Posted by CraigHickman

With your material costs there, I'd highly recommend looking at the new GEM500 planetaries from Andymark. They'd probably end up cheaper with 4 stages, which would give you a 189:1 ratio (I think).

Out of curiosity, what made you go with that shape?

The size and shape of the gearbox are specific to a project were working on and fits very nicely vertically in the space its required. The reason for going big was that we have many of the large gears kicking around plus i wanted to keep it to minimal stages. So really the gearbox isn't costing much because its being laser cut along with a much bigger project which is the main focus.

Originally Posted by kajeevan

The size and shape of the gearbox are specific to a project were working on and fits very nicely vertically in the space its required. The reason for going big was that we have many of the large gears kicking around plus i wanted to keep it to minimal stages. So really the gearbox isn't costing much because its being laser cut along with a much bigger project which is the main focus.

Very cool. It's good when teams use what they have. Also props that you successfully designed inside space constraints; that's not always easy to do.

[vivek16]

Ah, if you have contraints, I take back my comments. Good that you're using things you have laying around. You don't always need the sleekest, fanciest solution so long as it works well.

-Vivek