I have mostly worked with continuous elevator designs. The first that I worked on was the 2004 GRR robot. We used 80/20 extruded aluminum with the recommended sliders to create a version of an extension ladder. A CIM motor powered the elevator design with timing belt and pulleys.
The main concern that we had was the friction that this design created. If you watch the video link below, you will notice that it takes about eight seconds to get to ten feet. The friction between the 80/20 and sliders proved to be a constant battle. We learned that the weight of the 1" X 1" 80/20 created a bowing effect that was hard to overcome. Using graphite in the sliders improved the design.
Overall it worked very well and accomplished the game tasks of getting a hook to a ten foot bar. We continued to improve on the design in future years on the team.
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Originally Posted by sanddrag
Can we get some photo examples of each?
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There is much more detail on the robot on FRC Designs: Behind the Design. Check out this link for more information (
http://www.frc-designs.com/btd/2004_340.html).
Here is a photo example of the 2004 GRR robot.
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