pic: Team Unlimited's Gear Shifter

[gdo]

[cdm-description=photo]29033[/cdm-description]

[WCRobotics]

What sensors are you using in the back of your robot?

[fredliu168]

What sensors are you using in the back of your robot?

Pretty sure they are using optical shaft encoders to detect axle rotation.

[basicxman]

how much vex do you guys have!?!?

[WCRobotics]

Pretty sure they are using optical shaft encoders to detect axle rotation.

That's what I thought, just wondering if it had anything to do with stopping the motor that changes the gears.

[Leav]

I think it would be best to use a real servo with a limited rotation and exact position for shifting the gear, instead of a motor...

all in all amazing design! very cool!

I really like how it shows the complex notion of gear changing in an easy to understand way...

-Leav

[Akash Rastogi]

How did you guys get those three gears in the back flush against each other (cut off protruding edge or just different gears?)

[Barry Bonzack]

How did you guys get those three gears in the back flush against each other (cut off protruding edge or just different gears?)

You got it, they would have had to grind down the edge.

[11Mort11]

isnt that illegal

[Barry Bonzack]

isnt that illegal

Rule <R9> (http://www.usfirst.org/uploadedFiles/Community/02FVC/FVC_Documents_and_Updates/2007_Quad_Quandary/2007_FTC_QQ_Manual_Section_4A.pdf) gives a list of which parts can not be modified, and other ways things can not be attached. Taking parts and modifying them is allowed, otherwise a team would not be allowed to cut metal.

[GBIT]

that is cool,but do you guys have a problem with the gears grinding as you shift. or do you stop,then shift. Just wondering?

[psyco_klown]

There design is shift on the fly but the can shift stationary. The rack and pinion make much it smoother. I dont know if you can see it or not they also beveled the gears with a drill and sandpaper.

[GBIT]

o yea i see that now thanks.