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Unread 20-01-2010, 09:47
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Re: pic: Ramp Video

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Originally Posted by betsy888 View Post
How does your ball-differential work? From what I understand of ball differentials, there is one drive gear and 2 driven axles. So I assume your center omni wheels are on the driven axles. But you have 2 driving chains coming from the omni wheels and only one drive gear. Do you have a special type of ball differential? Can you explain a bit more?

The Mechanum wheels are driven, the chains drive sprokets on the ball differential, between the sprockets are steel balls that are inside a round flange with holes for the balls. The flange is attached to the drive shaft with the omni wheels. Pictures are on our wesite http://www.team1322.org/ideas.htm

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Unread 20-01-2010, 21:44
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Re: pic: Ramp Video

[quote=joeweber;902964]The Mechanum wheels are driven, the chains drive sprokets on the ball differential, between the sprockets are steel balls that are inside a round flange with holes for the balls. The flange is attached to the drive shaft with the omni wheels. Pictures are on our wesite http://www.team1322.org/ideas.htm

I think I know the source of my confustion. I assumed the omni wheels could move independent of each other. Now that I see your ball differential drawing and photos it looks like they are attached to the same shaft so must move together. If this is true, why do you have 2 omni wheels at each location, why not just one?
As always, thanks and good luck!
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Unread 20-01-2010, 21:51
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Re: pic: Ramp Video

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Originally Posted by betsy888 View Post
If this is true, why do you have 2 omni wheels at each location, why not just one?
It provides a smoother ride than having one single omni at each point. A number of teams have tried single; I believe most of them switched to double at some point.
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