Quote:
Originally Posted by Chris is me
There's a chain reduction, so direct driving the center wheel isn't possible without a gearing change.
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From the looks of it the small sprocket on the toughbox looks to be about 16 tooth and the sprockets on the wheels look around 48 (Very ROUGH numbers) and assuming its a standard toughbox the overall reduction is 28.3:1 and those look to be 6" wheels so the top speed would be 3.05ft/s
Or on the back side of that wheel the sprocket is smaller than all the others and after looking at the AndyMark website the smallest sprocket (#25 I am assuming) is 32 tooth and the sprocket on the toughbox output shaft is still 16 that means the overall reduction is 25.5:1 and the top speed is 4.57ft/s
From what I know your average single speed robot is ~9ft/s which would cause me to thing there is some sort of difference in the toughbox or the extra chain reduction can be removed and supplemented with one of the many gearing options AndyMark has for sale.
After going back to the old thread I see that your wanting to get ~12ft/s which you can do by using the Toughbox with the optional 9.87:1 and direct drive which would give you ~11.82 ft/s