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pic: 6WD Chassis
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1) Great job! Thanks for sharing.
2) You could probably eliminate some of those vertical supports and still have sufficient frame rigidity. 3) 59 lbs sounds a little heavy for what is pictured (are you including the battery in this weight?). What kind of material, e.g. wall thickness, is your structural tubing? |
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EricH suggested 1/8" wall tubing, but this was when Rion had a single tier frame (no vertical supports and no top half) so would 1/16" wall be sufficient in this two tier frame?(vertical supports with top half) |
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Thanks for the supports advice. I will definitely pull some out. Ya.. i was thinking it was a little heavy... Yes the battery is included. The wood board... Inventor thinks that is Aluminum 6061, I can't find a wood option and it was originally going to be that. The frame is made of 1" extruded aluminum(sides are 1/8"). |
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You're going for the wide chassis footprint rather than the narrow.
You don't need 6 wheels to rocker a wide chassis - it turns fairly well with 4. |
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I would definitely keep 1/8" wall for the outside perimeter, and I would question the need for that upper deck. I like the battery box. You may consider flipping the battery around, and putting a mounting tab to hard mount the Anderson Powerpole connector to the box. ;)
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One suggestion, I wouldn't have the C'rio up against the front in case you get a hard it. It happens a lot. I don't think any team wants to have the most expensive piece of there robot be destroyed.
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What is the indent in the front for?
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I assume the tabs along the sides are for bumper attachment. Given the limited hand space there, are you thinking cotter pins through bolts to hold them on?
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http://decibel.ni.com/content/docs/DOC-6176 Quote:
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I would have no concerns about moving your cRio. Just make sure it's easy to access. You'd be safe using 50 lb/ft^3 density for your wood panel. Aluminum is about 3 times that (I just looked up the densities for for particle board and 6061 aluminum for these numbers). http://www.engineeringtoolbox.com/wo...sity-d_40.html has a list of densities for various types of wood. |
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That really does take a beating. Guess I now know what is the strongest part of the robot.:] |
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Somehow we modeled ours in Inventor last winter...huh....
http://www.chiefdelphi.com/forums/sh...ad.php?t=71902 |
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I don't remember exactly where it is, but in the iProperties of a part you can change the density to a custom value.
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I think its time to switch to solidworks.. :rolleyes: |
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You definitely want to be using a wood friendly modeling program. Wood is where it's at.
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Maybe I'll switch back to Inventor 2009 until I can get solidworks somehow....
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Also Solidworks has a wide range of add ins and the workflow is Fantastic. If you want a Copy of Solidworks, Marie Planchard would be the person to contact, Solidworks Rep for FIRST. -RC |
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