View Single Post
  #2   Spotlight this post!  
Unread 25-01-2017, 16:54
GeeTwo's Avatar
GeeTwo GeeTwo is offline
Technical Director
AKA: Gus Michel II
FRC #3946 (Tiger Robotics)
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2013
Location: Slidell, LA
Posts: 3,792
GeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond reputeGeeTwo has a reputation beyond repute
Re: Gear Sliding down Ramp

Quote:
Originally Posted by Bob Steele View Post
If anyone actually does this for both FRP and the orange peel HDPE I would be interested in seeing what that number is.
Not those numbers, but we did measure the CoF of a gear with an actual FRC (2015) carpet yesterday (laying flat) using the well-known ramp method, finding it to be 0.43*. Static and dynamic were indistinguishable; once the gear started it moved at a slow steady rate down the ramp. As the gear weighs 18.4 oz per the game manual, expect to have a frictional force of about 8 oz.

* 39" long piece of plywood backing, hand raised, tape measure measurements, so you might want to put around a +/- 0.02 on it.
__________________

If you can't find time to do it right, how are you going to find time to do it over?
If you don't pass it on, it never happened.
Robots are great, but inspiration is the reason we're here.
Friends don't let friends use master links.
Reply With Quote