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#1
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Re: pic: Manually machinable one-speed gearbox
So it sounds like the consensus here is that to do a Texas Tube design, you must keep all of the axles horizontally inline, and just put smaller diameter wheels on the outside to create a "drop center." I've been throwing together designs in CAD for different drivetrain styles, and I wonder if someone can explain to me if this would or wouldn't work:
![]() (sorry for the poor render quality) Rather than dropping the center or raising the outsides, I did both. I lowered the middle 1/16" and raised the outsides by 1/16", to end up with a "drop" of 1/8". From everything I can see and read, this would fit very snugly into a 1x2x.125 tube. It's completely COTS and would let you use 4", 6", or really any other size wheel anywhere on the drivetrain -- which is big for teams with few resources. General specs: 2"x1"x.125" aluminum tube AndyMark Toughbox-Mini gearbox (alum plate cut down slightly) 17t #25 Team 221 dual sprocket |
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#2
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Re: pic: Manually machinable one-speed gearbox
You can also use omni wheels on the outside wheels, especially in a game with little or no pushing and defense like this year.
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#3
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Re: pic: Manually machinable one-speed gearbox
Quote:
In fact, our entire setup is very similar to this, with only a couple differences: -- we used 2x1.5x.125 tube -- we used VexPro 16t #25 sprockets |
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#4
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Re: pic: Manually machinable one-speed gearbox
Did you have the issue that 118 mentioned earlier of the chain grinding on the outer bearing race?
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#5
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Re: pic: Manually machinable one-speed gearbox
Quote:
Here is a technical drawing of (an early version of) our drive tube. Last edited by Nate Laverdure : 15-05-2015 at 13:28. |
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