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Unread 24-01-2017, 19:33
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Richard Wallace Richard Wallace is offline
I live for the details.
FRC #3620 (Average Joes)
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 1996
Location: Southwestern Michigan
Posts: 3,677
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Re: How many seconds to climb the rope?

  • The touch pad is 58 inches from the floor.
  • A robot attaching to the rope 23 inches from the floor must raise itself 35 inches to reach the touch pad.
  • The energy required to raise a 150 lb robot 35 inches is about 600 Joule.
  • One CIM motor can operate at >300 Watt output power for a few seconds.
  • => Two CIM motors can deliver 600 Joule in about one second.

If mechanical efficiency is high enough, a climbing mechanism powered by two CIM motors can complete the lift in about one second, after the attaching to the rope. Some mechanisms might be made even faster, by attaching to the rope at a greater initial height.

Time required to reach the rope and attach will be the limiting factor on how many seconds a drive coach will need to allow at the end of a match.
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Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
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