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Re: 6WD Chassis Stiffness vs. Maneuverability
You must spread some Reputation around before giving it to IKE again.
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Re: 6WD Chassis Stiffness vs. Maneuverability
Quote:
Thanks for the thoughts. |
Re: 6WD Chassis Stiffness vs. Maneuverability
Try a 6x4. That worked great for us this past year. (It was as much a joy to develop it's autonomous system as it was to drive! :D)
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Re: 6WD Chassis Stiffness vs. Maneuverability
1024. You guys had a fantastic autonomous. We looked at your machine last year and it actually sparked a lot of this debate (at least internally within my team). Two things we noted on your machine were the welds, and then the full pan on you machine last year.
Once you throw your new control system in this, mass it up and let me know how it performs on carpet. Are you guys sticking with the full belly pan for your controls again? |
Re: 6WD Chassis Stiffness vs. Maneuverability
Ike, I think your going down the right track now ,with chassis flex. our most manuveral 6wd chassis was 07 ,that frame was very stiff!!!! It was built from 3/4 x 3/4 1/6 wall aluminum tubing fully welded, and had a upper level and lower level creating a space frame. It also had some of the down tubes on 45 degree angles creating triangular bracing. This is very important in chassis flex ,just look at most racing chassis designs ,lots of triangularity. Our 07 bot had no flex ,with the forces being applied during competition. If you look at the bots your talking about, 254 ,968,330, west coast design .They use a single level frame ,but use 2x1 aluminum tube creating a very stiff chassis !!! I would suggest doing some chassis flex tests by securing the rear of the frame ,clamp a rigid bar across the the front of the bot ,put a load gauge on the end of the bar .Put a dial indicator on opposite side to see how much flex your getting at a known force. Also put pieces of tape accross areas of the frame and watch for the tape to go slack ,brace it and try again. One other thing about the 07 bot we used the high traction tread ,it was better at turning as the year went on as the outer wheels wore down. But did not effect our traction or dynamic braking, as no one could move us at the rack. Hope this helps you out.
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Re: 6WD Chassis Stiffness vs. Maneuverability
gonna sound crazy but last year we had a two wheel drive. ball casters on the corners. only problem was not enough speed. we sure had power though. only thing i would changed about how it was set up would be the drop on the wheels. it rocked a lot. but for throwing this together ten minutes before our next match started i thought it worked great. we had gone with four wheel drive but couldnt turn. this year we are prototyping a few new and original designs. should be a fun time. any suggestions on the best drivetrains would be great.
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