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  #1  
Old 05-17-2007, 01:11 PM
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Smallest VEX with Transmission!! 2 speed!!!

i have created a vex bot that has a 2-speed transmission that is built right in. i believe it is the smallest yet!

here are links:

http://www.vexforum.com/gallery/showimage.php?i=523&c=8
http://www.vexforum.com/gallery/showimage.php?i=522&c=8
http://www.vexforum.com/gallery/show...original=1&c=8

if there is a smaller shiftable bot, let me know!
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Old 05-17-2007, 01:45 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

so far i'd have to say yes and it has good steering
but how did you make the bar for the front
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Old 05-17-2007, 02:31 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

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Originally Posted by Heavy Metal View Post
so far i'd have to say yes and it has good steering
but how did you make the bar for the front
What the small c-channel? You can get it in the advanced metal kit.

Lokks pretty nice. Someone ought to try to make a 5 speed VEX transmission.
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Old 05-17-2007, 04:20 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

Indeed it does look small. How well does it work? Can is shift on the fly?
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Old 05-17-2007, 07:00 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

i think vex has a linit on how small it is possible to make a transmissio. yours is quite small, but the 84 tooth gears make it the first with them i've seen
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Old 05-18-2007, 07:20 AM
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Re: Smallest VEX with Transmission!! 2 speed!!!

the bar in the front is just 2 side pieces bolted together, i'll get a closeup

yes, it can shift on the fly, and the top speed is perfect (real fast)

i am glad to get some recognition for this. it took 4-6 hours just to get the gears right for the small size
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Old 05-18-2007, 01:31 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

i think one of the lesser points of your robot is that it is just shifting on one side, which doesnt make sense to me. each tiime you shift, the robot is going to have to force two sets of gears to mesh. it would make sense if both sides were powered by an individual motor, but you have it needing only a common shaft connecting the rear wheels since they cant possibly turn differently. otherwise, i like the shifting mechanism.
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Old 05-18-2007, 04:59 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

thanks, it feels good to be recognised. about its flaws, pacoliketaco, it needs improved, and i need parts. what can i do
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Old 05-18-2007, 11:12 PM
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Re: Smallest VEX with Transmission!! 2 speed!!!

Quote:
Originally Posted by Bobby C View Post
i have created a vex bot that has a 2-speed transmission that is built right in. i believe it is the smallest yet!

http://www.vexforum.com/gallery/showimage.php?i=523&c=8
Nice. I like the way you move the intermediate axle with a slider between collars.

What if the motor and driving gear stack were mounted on a plate that slides on a pair of axles as sliders?
--Joel
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Old 05-20-2007, 07:34 AM
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Re: Smallest VEX with Transmission!! 2 speed!!!

Quote:
Originally Posted by Bobby C View Post
i need parts. what can i do
i know what you mean...
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