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Unread 30-01-2007, 17:45
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Madison Madison is offline
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Re: pic: FRC488 2007 Robot

Quote:
Originally Posted by Rob Colatutto View Post
I'm very interested in your lift mechanisms there under the ramps. What do you use to power them? Looks very intriguing though, one of the more creative designs I have seen thus far. Nice looking model.
The lifts are each comprised of two four bar linkages. Each linkage is driven by a 125 lbf. gas spring that is held closed by a mechanism that's not shown -- it, too, was a fatality of the recent redesign. The gas springs allow the lifting to occur without the need for power or stored air -- so we feel that it should be a reliable mechanism for lifting robots at the last possible moment. Also, we like that the gas springs of the same extension are available in different values of output force, so if we find that 250 lbs. per side is too much or too little force, we can change it quickly and easily.
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