Battery Buggy B

[SlipStrike1244]

wait, you're still at regionals
if you have time
PLEASE GET A BIGGER THREADED ROD
the difference of 1.5 meters should not be .3 on your ruler
the bigger the threaded rod, the more accurate you can position it.

[MadCow2357]

See, we only tested in 0.5 meter intervals. If we are to get to 10 cm intervals, we cannot accurately guess with our amount of data (24 runs is not much). I will test some more, I guess.

[MadCow2357]

wait, you're still at regionals
if you have time
PLEASE GET A BIGGER THREADED ROD
the difference of 1.5 meters should not be .3 on your ruler
the bigger the threaded rod, the more accurate you can position it.

States man. Comp is tomorrow. I should have been done already, but still some last minute things to accomplish.

[SlipStrike1244]

See, we only tested in 0.5 meter intervals. If we are to get to 10 cm intervals, we cannot accurately guess with our amount of data (24 runs is not much). I will test some more, I guess.

test, test, and retest for consistency
also try cycling batteries through tests because that was the main problem for us
alignment was easy, testing was easy, it was just the stupid batteries

[SlipStrike1244]

same with us, we aren't touching it because it is literally perfect.

[MadCow2357]

wait, you're still at regionals
if you have time
PLEASE GET A BIGGER THREADED ROD
the difference of 1.5 meters should not be .3 on your ruler
the bigger the threaded rod, the more accurate you can position it.

States man. Comp is tomorrow. I should have been done already, but still some last minute things to accomplish.

Last year the brake setting equation for Scrambler was 10 - (0.3 * target distance) = brake setting.

[MadCow2357]

wait, you're still at regionals
if you have time
PLEASE GET A BIGGER THREADED ROD
the difference of 1.5 meters should not be .3 on your ruler
the bigger the threaded rod, the more accurate you can position it.

States man. Comp is tomorrow. I should have been done already, but still some last minute things to accomplish.

Last year the brake setting equation for Scrambler was 10 - (0.3 * target distance) = brake setting.

Wondering what the 10 minus thing means, ideas?

[hippo9]

How do you make a brake setting equation? I have the wingnut traveling along a piece of wood with part of a metric ruler attached to it. I have my data in this doc, maybe you could help. I hope I shared this right...
https://docs.google.com/document/d/1mQF ... sp=sharing

If you wind your wingnut by spinning the wheels, you can take the distance and divide by the wheel's circuference and get the amount of rotations you need.

[shrewdPanther46]

In theory, yes. But in reality, with skid and all that, and curvature, it never quite comes out like that (from my experience and others who are doing buggy). The correlation coefficient when i ran a lin reg wasn't really high enough to make those assumptions. You have to simply test properly, with care and precision.

[MadCow2357]

First, we are going to NATIONALS!! WOOOO!!!!!! Second time in a row!

I am planning to build a completely new 3d printed/carbon fiber battery buggy from scratch. I do have a few questions though (surprise!):

1. How do you make the adjustable steering? I know it would look something like an F1, with a swivel in the middle. However, I am not sure how I would make the swivel. Would I use some kind of bolt and nut to lock it? I feel like the bolt could loosen any moment, and therefore cause the Battery Buggy to swerve weirdly.
2. How do I cut carbon fiber, and how accurate could I cut it?
3. Can I drill into carbon fiber and ABS?
4. Should I keep using my 12V motor, or should I buy a 6V? Pololu has identical 6V and 12V motors, except the voltage, speed, and power are different.

I'm still in the planning phase, so I am open to suggestions.