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#16
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Re: pic: Track System
How much does each drive module cost?
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#17
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Re: pic: Track System
Quote:
Not sure of the individual cost. If you're interested in going with these next year (they'll be adapted to fir the field, if climbing is needed, it'll be modified to fit with that) just get in contact with Sam Shawe. You can contatc OutBack Manufacturing at www.outbackmfg.com, look around there for their contact info. |
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#18
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Re: pic: Track System
I am not really that interested in treads, but if they are good at machining FIRST parts, I would like to get a quote to machine parts for our new drivetrain. I am really looking for a cost just as a comparison.
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#19
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Quote:
1. Track material falls off Last year it happened yes....but not This year? To an OutbackTrack at least. Interesting. Outback fixed the problem with a thicker track and beveled edges this year. 2. These belts break if (ab)used too much Both Belts snapped. Only because the force of the robot going sideways and the tracks moving forward put a wedge between the lower layer of the track and the drive wheel, Snapping the belt instantly. This problem can be fixt by enclosing the plastic layer of the belt more, allowing it not to move. At all, side to side. The simplicity of the track system 997 is using allowed them to change out 2 belts completely in less than 45 minutes. In the past I have seen this take up to 3 hours. for just one track : / 3. Teams do not gear them low enough I would have to agree with you that the Gear ratio for a track system needs to be refined. The amount of traction a system like Outbacks needs the implementation of a well designed 2-speed gearbox. @ 2fps that track system would push anybody. I have yet to see a well geared track system be pushed by a wheel driven drive train. With 2 fps for lower and 7 for high gear. Driver practice. Good game. *** For the most part teams tend to avoid using a track system for a drive train because it is a real pain in the As(s) to make them right. It is not the same as throwing 6 wheels/sprockets onto some axles and slapping a chain down. But, through trial and error a well designed Tred/Track system (in my opinion) has proven to be the most efficient if you want reliable traction/power. FierceRabbit. Maxwell. |
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#20
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Re: pic: Track System
Well, I've been listening to the people who may actually consider buying transmissions once we swing into gear to sell them, and so I've designed another one (Did it in the last hour. I got bored and inspired, and have mad CAD skillage....). The new one has a low speed of 4 fps, and a high of 10. Drivers will most likely stay in high gear most of the time, and when they hit a pushing match, they will shift down to be able to torque.
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#21
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Re: pic: Track System
Quote:
![]() Also, the cost for the entire thing is only $1,200. The belts alone are 300 apiece so 1/2 of what a team would pay would be for the belts alone. For the quality of and time put into this drive train it is well worth the $1,200 Last edited by pakratt1991 : 17-04-2007 at 01:11. Reason: typo |
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#22
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Re: pic: Track System
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#23
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Re: pic: Track System
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$1200? Maybe you just didn't elaborate, but that's illegal. There's a maximum price per component of $400. In addition there is now a rule that says entire subassemblies cannot be purchased from a vendor. Given that the above is true, even if you split the system into two sides, you're looking at $600 per component, and you still have a complete subassembly, which clearly doesn't work with the 2007 rules. I was under the impression teams using the tracks were all sponsored by Outback Manufacturing, not paying for the tracks. Could someone clear that up? |
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#24
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Re: pic: Track System
The tracks cost $300 a piece (2x=$600), and the material is cost covered by the team ($600), while Sam does the machining for them. Since you are not purchasing a finished assembly, rather the costs associated with the manufacturing, they do not fall under the same rule.
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#25
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Re: pic: Track System
$1200 seems a bit ridiculous for a drivetrain. Does that include transmissions, because I guess that would make it a little more comparable to a wheeled drivetrain.
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#26
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Re: pic: Track System
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We're talking about two different rules. You're talking about manufacturing costs. I'm talking about the fact that you cannot buy a completed subassembly under the 2007 robot rules, which is exactly what these tracks are. |
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#27
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Re: pic: Track System
Is this statement based upon something, like math, or just a subjective observation?
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#28
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Re: pic: Track System
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Last edited by Alpha 997 : 17-04-2007 at 18:38. |
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#29
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Re: pic: Track System
Quote:
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#30
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Re: pic: Track System
Both. The center pulley is lowered about a tenth of an inch. I also watched these, got a chance to play with them, have the CAD, and have done massive research on them.
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