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Unread 23-02-2014, 14:30
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AKA: John Taylor Novak
FRC #0016 (Bomb Squad)
Team Role: College Student
 
Join Date: Aug 2009
Rookie Year: 2002
Location: MIT
Posts: 82
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Re: Baxter Bomb Squad 2014 ~ Nighthawk

Quote:
Originally Posted by TD78 View Post
great looking robot! love the swerve...your team is the best around that does it!

question about the intake...how does the wheeled shaft interface with the lexan "arms"? looks like the shaft goes into a metal plate, that is in turn attached to the lexan. chain or similar running down to the robot to the motor? any close up pictures available?
Thanks for watching! I'll try to explain my best on how the beater bar mechanism works. As stated before, we use a BaneBot 550 motor that is actually mounted inside the bar itself for protection, ease of design, lowered machining times, weight, and overall cleanliness. I have attached some pictures of our CAD model below that provide a visual representation on how we fit the motor in the beater bar and how we interface the drive shaft of the motor with the bar. We machined round inserts that fit into the bar and are screwed in from the outside with flat head screws that have a hole in the center with clearance for a key so they can slip on the output shaft of the stock 25.91:1 BaneBot gearbox (it may be a different gear ratio, but I'd have to look at it to make sure). The motor/gearbox combination is attached to the poly-carbonate strips by two 1/8" stainless steel plates that capture the motor and a small aluminum block that both holds the assembly together and attaches it to the poly-carbonate frame component. The other end of the beater bar is simply held on by a small machined part that fits into a ball bearing on one end and interfaces with the Lexan on the other end via two screws. For purposes of illustration, I made the beater bar transparent even though it uses our Baxter blue livery in the real world.



-John Taylor Novak

P.S: Unfortunately, I don't think I am able to give CAD models until the season is over due to the nature of the competition, but I'm more than happy to provide pictures of the models for a rough reference to the overall idea.
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Last edited by JTN : 23-02-2014 at 14:31. Reason: Picture was too big.