Here is our 2017 robot cad, there are some inaccuracies due to file failures and lost files. If you have any questions and comments feel free to leave them below.
https://team2471.org/resources/cads/
Nice now I can show my friends
Yesssss. Thanks for posting, I always wanted to see your CAD! 
Edit: I can’t open .stp in Solidworks 
, can anyone post a step?
Hey Brian M,
Sorry that you are have troubles opening the cad, Inventor is not letting me post .step files only .stp. But I believe that you can open stp. files in Solid Works if you change some settings while trying to open it.
SolidWorks doesn’t even differentiate between .stp and . step when opening. Exporting as a .stp is a little tricky, but you should be able to open it just fine.
Ok, so looking at the CAD I have a couple questions.
I love the design and execution of the PTO intake. I’ll have to remember that idea of extending the drive axle on a WCD for the future. But what were your decisions to use a PTO? Looking at the space there, I feel you could have easily fit a custom 775Pro gearbox in the space required and eliminated the need for pneumatics on the PTO and the ratchet. I count 13 motors on the robot currently. Am I missing something?
Speaking of the ratchet, was it used as an actual ratchet, or more of a lock that was applied only when power was removed from the intake?
And on the shooter, I see two black discs that look like flywheels. What material are they?
Thank you!
Thank you for taking the time to look at the cad, and to respond.
The intake was powered by a 775 pro on a 10/1 versa planetary while collecting balls and while wrapping up the slack of the rope. The PTOs were just used at the end of the match for climbing the rope. The reason we did not do a custom gear box is because of the lack of a extra motors slot when bagging the robot (at that point there was an extra motor on the intake, and another slot was being used for vision tracking). There was no ratchet applied at the end of the match we just put all six cim motors into brake mode and we slowly rolled down the rope.
The shooter had two rubber 4 inch wheels from McMaster Car that were two pounds each, and two fly wheels that were steel they were made in house and also weighed two pounds a piece.
Any more questions feel free to ask!
Thank you for taking the the time to look at the cad and responding!
The intake was powered by a 775 pro on a 10/1 versa planetary while intaking balls and while taking up the slack in the rope. The PTOs were only used when the 775 pro had wrapped up the slack in the rope and hit a torque limit. At that point the PTOs would engage the drive train and climb. There was no ratchet engaged at the end of the match, the drive train was put in brake mode and we would slowly roll down the rope.
The shooter had four inch rubber wheels (McMaster Car) that were two pounded each. It also had steel flywheels that were made in-house and also weight two pounds each.
I hope this answers your questions, feel free to ask any more you may have.
Try renaming the file extension from .stp to .step, otherwise something is wrong with your copy of Solidworks. stp and step are the same thing.