1471A Toss Up Reveal - "Servo"


We decided to post the robot we’ve been using for most of this season and the one that qualified us for worlds at State last weekend.

This robot is an Arizona State Champion and the Arizona Programming Skills Champion.

Out of the 7 tournaments this robot attended, we won 6 and got the excellence award and finalist at the 7th. We also got the excellence award at two of the tournaments that we won and the design award at two more. We got first seed 5 times, robot skills champions 5 times, and programming skills champions 6 times.

Our highest official skills scores were 50 for programming and 73 for robot skills. We did get 73 in programming skills once but it was not an official run… Dang. :stuck_out_tongue:

It’s a side roller, 6 bar bot with a 15" long drivetrain and a 35 hole length arm. We used 4 393s on speed gearing for the direct drive, with a loose chain to connect front to back. 4 393s powered the lift at 5:1 for most of the season but we switched to 7:1 before state to make hanging easier. The intake is 1.6 geared and went through several different roller revisions.

The robot could hold two big balls in some cases, but was usually limited to one. We low hung with a big ball throughout the entire season by lifting and swinging back to land on the wall. This was about 90% reliable with the 5:1 and absolutely 100% reliable with the 7:1. The robot weighed in at about 11 pounds after all.

Please ask any questions you have about our robot and we’ll be glad to let you know anything you’d like!




The robot served us extremely well and definitely achieved our goal of securing a Worlds qualification at State. We’re excited to see you all there!

Very nice looking robot!

Do your intake motors touch the ground?
Are you able to knock large balls off the barrier with your hanging hook?
Are you able to drive under the barrier in reverse with your hanging hook?

What are you planning to improve before worlds?

The hanging hook knocked them down sometimes, but if we made it stiffer on the rubber couplers it would work every time. The intake motors don’t usually touch the ground but they were a little bent after state so that’s why they’re so close. They used to be about a quarter inch up - just enough. We cannot drive under in reverse but we find we have no need to do so. The robot is so light and fast that spinning around is just as easy. Usually you are going to have to spin at some point, so you might as well do it before you go under the barrier rather than after. Same goes for the bump. The robot never loses buckies when going over the bump forward at speed but if we go over backwards at speed we occasionally did.

This robot has already been taken apart for worlds, and we are working on a completely new design. We built a standard scoring robot in order to guarantee that we could secure a worlds qualification at state, and now we are starting again.