pic: 823543:1 Reduction Versaplanatery
 

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Too funny!

If my quick calculations are correct, you'd have to wait 57 minutes to watch the output shaft make one revolution!

Re: pic: 823543:1 Reduction Versaplanatery
 

this will resolve any issue with back drive.

Re: pic: 823543:1 Reduction Versaplanatery
 

But man, think of the torque implications that has!

Re: pic: 823543:1 Reduction Versaplanatery
 

Just *barely* falls off the load rating chart.

However you can always ship it back to Paul if you break it; you know, see what happens.

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Should be fine if you ever need to pick up a truck...or a house.

Re: pic: 823543:1 Reduction Versaplanatery
 

If only the internal gearing on the final 3 stages and the 1/2" hex output shaft could carry the torque! :rolleyes:

261,000 foot-pounds of torque could lift every single robot in FRC together... still with a 12" spool. Of course, you'd want to use like a 3" spool so it could still lift at peak power, not stall... and it'd take about 2 and a half hours... and 254's stockpile of batteries.

Re: pic: 823543:1 Reduction Versaplanatery
 

This looks like something 71 would be responsible for :D

Re: pic: 823543:1 Reduction Versaplanatery
 

So have you found the screws yet? Reminds me of this https://www.youtube.com/watch?v=VUbpb23yTK8

Re: pic: 823543:1 Reduction Versaplanatery
 

Do you even torque?

Re: pic: 823543:1 Reduction Versaplanatery
 

or a boulder...

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Congratulations; you almost just made yourself the world's torquiest hour hand.

Re: pic: 823543:1 Reduction Versaplanatery
 

Ahh... the old long con...

Re: pic: 823543:1 Reduction Versaplanatery
 

Why climb up to the scaling rungs when you can move the entire field down to your robot's height?

Re: pic: 823543:1 Reduction Versaplanatery
 

Too funny. At least that team member is learning the idea of gear ratios. haha

Re: pic: 823543:1 Reduction Versaplanatery
 

You might draw enough current just turning all those gears to actually brown out your RoboRIO. At free speed.

Re: pic: 823543:1 Reduction Versaplanatery
 

Give me enough gearboxes and I'll move the world.

Re: pic: 823543:1 Reduction Versaplanatery
 

I wonder how much voltage you can apply before a sun gear shears off? Also which one will shear?

I imagine this will happen even if nothing is connected to the output shaft.

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Efficiency? We don't need no efficiency!

Re: pic: 823543:1 Reduction Versaplanatery
 

Reminded me of this.

Re: pic: 823543:1 Reduction Versaplanatery
 

Cool, looks like it's a good start to the 10,000 year clock construction.

A few more stages, some threaded rod and a pointer and you can mark it DONE!

Re: pic: 823543:1 Reduction Versaplanatery
 

and it would be about as hard to stop as actually stopping time!

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Unless you know of an easy way to generate 2,882,400 in-lbs of torque! (Assuming the BAG motor is stalled at an input torque of 3.5 in-lb)

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Is that accounting for any backlash (or i guess forward-lash?) in between the gears, especially on the final gears?

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Reminds me of the time I asked a freshman to grease the gears in the gearbox they had assembled. I came back 5 minutes later to find an absolutely perfectly even coat of grease on both sides of the 50T gears - none on the teeth. A true artist.

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Still a little too fast for art:
https://www.youtube.com/watch?v=5q-BH-tvxEg

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Maybe your student thought you folks were using it to launch real boulders.:)