Howdy, my name is Jade Krivanek, from vex team 1064B. We are a high school team located in Omaha, Nebraska, from Omaha North High School. I’ve finally convinced my team to let me do a reveal of our robot, and I’m hoping that there will be some helpful criticism as a result of this
To being, pictures!
Condensed in an album format, i did my best to get pictures of the drive, lift and claw. Unfortunately, I don’t have a drive photo from beneath and a photo of the lift fully extended.
The robot’s lift is a basically a double four bar system, with a capability of reaching ~50 inches in height when fully raised. The first two bars are configured as a standard four bar, and powered at a 1:10 torque gear ratio by three 393 motors. The second set of bars or the other four bar is chain driven and can have its maximal height adjusted by “resetting” the chain. What we did to align it was lift the first two bars up a bit, then lift the second bars slightly above that then lock it in place. The weight from the claw caused the second set of bars to droop slightly, so we compensated for that with elastics and setting it higher than necessary.
teams thoughts on the lift - it was interesting to do a lift that we hadn’t seen before, but we are planning to not continue to use it. It had issues with the second stage or set of bars getting knocked down a notch when it had something stopping it from lifting vertically, and that prevented us from scoring on the 30 inch goal in our final semifinal match in our last tournament.
The intake was a claw driving at a 1:5 torque gear ratio by two 293 motors. It was pretty average, and had no major issues with performance, but after seeing other teams using a intake roller system, we are planning to switch to that to more easily store objects and pick them up. I personally don’t think that claws are the way to go for this years game due to the lack of a descoring rule.
The drive is fairly basic by our standards, but was what we needed after going from HS chain loop to HS chain loop with different configurations. It’s a 7:5 speed ratio powered by four 293 motors. There are six wheels on the drive, two omnis on each side at the front and the back for easier turning and more grip, and then one standard wheel in the center to keep us from being pushed to the side.
Questions and criticism will be appreciated greatly!