DarthBuilder wrote: Rossyspsce wrote:
cuber wrote:• A rack and pinion was verry successful, and I came in second despite my alignment screw inexplicably coming loose, and the car veering 5cm. It simplifies the setup massively because you do not need to acomidate for initial angle.
Can someone explain this for me please?
I think I know what Cuber is saying so basically he has a chassis where the mouse traps sit then he has a front piece that can be rotated. So he has screws to adjust it then tightens it to lock the angle of it in place. Correct me if I'm wrong though.
I proposed this idea earlier in this thread, but I will explain it again. Baisically, the dowel is not fixed to the chasis, but instead a 10cm rack gear. A set of bevel gears transfer rotation from the front wheels 90 degrees to a pinion, which extends the rack as the car travels forward. The dowel touches the cup at first, but extends outward while the car moves straight. This strategy is not practical at nationals because you would need a 50cm rack, but nationals wont be in the cards for me so I tried it. it was not as “easy” to implement as I originally thought, but 3d printed gears do help quite a bit.
dragonfruit35 wrote:Also, @ cuber, do you mean that your car was 5cm off the VTP and you got second? How close was the cup to the CTP?
I was about 6cm off the CTP, with a 9.8 second run.