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Unread 20-04-2008, 22:36
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gblake gblake is offline
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Re: pic: vex coaxial swerve

Quote:
Originally Posted by pacoliketaco View Post
that was my goal. i think i have enough of those gears to sacrifice 4. although it was suggested on the vexforum that i stabilize the driven shaft more.
plt - Here are links to some pics of swerve modules I built. They have the robot chassis supported by 1/4" standoffs that rest on 60-tooth gears that for the tops of the swerve modules. The method might be useful for you.
Pic #0
Pic #1
Pic #2
Pic #3
Pic #4

I want to figure out how to create an even stronger connection between the chassis and swerve modules. I figure that if we were to try to use our designs in a competition, during the pushing and shoving that occurs in them, the axles in our designs (that allow the modules to swerve) will be the point where they bend and break.

I have toyed with the idea of sandwiching an 84-tooth gear between some plates and standoffs. 12-tooth gears around the edges of the 84 could brace it against pure lateral loads and the plates (probably augmented with stand-offs) would prevent twisting about the point where the module's axle enters the chassis frame.

The problem with what I outline above is that if the plates aren't cut to create a circular hole (an annoying expense) that exposes the 84-tooth's mounting holes and allows them to stay exposed as the 84-tooth turns; the connections between the 84-tooth and the rest of the module collide with the framing that holds the 84-tooth (in my imagination ). Maybe you can come up with a rugged way to bring the idea to fruition without ruining too much metal for other purposes.

Blake
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