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pic: FRC973 offseason teaser
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Re: pic: FRC973 offseason teaser
Well, the above looks (operative word: looks) like a standard cylinder used on an AM Shifter (and many other designs for its widespread availability).
I can only imagine this will have something to do with a minibot launcher or some other one-shot device--I can't see the reduced stroke being used to shift a drive gearbox unless they redid the entire thing to accommodate that (and I think that if anyone can play the if-it-ain't-broke card...) |
Re: pic: FRC973 offseason teaser
I can see it being used to reduce the amount of air a shifting transmission uses. The project could easily be a gearbox that makes it work.
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Re: pic: FRC973 offseason teaser
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the smaller bore would mean less force, and for the weight and complexity of solenoids and all the tubing, they might as well use a servo, or a pair of servos. my bet is on mini-bot deployment. |
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Re: pic: FRC973 offseason teaser
Many teams use short stroke cylinders for shifting their transmissions. 987 uses a half inch stroke for our ball shifter...
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Re: pic: FRC973 offseason teaser
I think the small cylinder is going to be used for shifting the custom 2 speed gearbox on your six wheel drive train.
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Re: pic: FRC973 offseason teaser
Let's just say California will be rocked in the off-season with what 973 has in store for it. :p
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Re: pic: FRC973 offseason teaser
Both of these cylinders are .5" stroke, and both are readily available. 3/4" Bore is somewhat "standard" in FRC from the years it was one of the few allowed sizes, but industry doesn't respect these limitations. Both can be bought directly from bimba or mcmaster for the same price more or less, and ship fast.
The lower one is a 5/16" Bore, and has substantially less shifting force. We've also been running 9/16" bore shifters the last two seasons with great success. Won't say what they're for just yet, but some good comments in the thread so far! |
Re: pic: FRC973 offseason teaser
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Re: pic: FRC973 offseason teaser
These may also offer an appropriate amount of clamping force for a "gas shock" style roller claw. (ie. 1902 in '08)
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Re: pic: FRC973 offseason teaser
Keep in mind that a 5/16" bore is only pushing with 4.5 lbs.
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Re: pic: FRC973 offseason teaser
perhaps some sort of locking device for your arm. something with one or two of these that locks the arm in place when it isn't being driven, it could reduce the amount of bounce and slop in the arm and make it smoother, and thus easier to place tubes.
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Re: pic: FRC973 offseason teaser
It could be used in a similar way of 254's to let go of the tubes without the use of a roller claw.
Whatever it is, I can't wait to see it at CALgames! |
Re: pic: FRC973 offseason teaser
The guesses about drive shifter are correct. However, there is something odd going on, as this is not strong enough to shift our usual gearboxes (9/16" doesn't sound much bigger, but it has a lot more force).
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We likely won't be there, the cost is much higher than other CA events, and they won't allow us to enter multiple robots. |
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-RC |
Re: pic: FRC973 offseason teaser
Shifting sprockets? like on a bike.
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Re: pic: FRC973 offseason teaser
Go go gadget power take-off device.
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Re: pic: FRC973 offseason teaser
4.5 pounds of force should be plenty to shift a ball lock shifter
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Re: pic: FRC973 offseason teaser
We are in the middle of our ball shifter transmission design so that's what I was thinking they may be doing as well. I'm really curious how folks are reducing friction within the ball shifters - Ooopps, off topic.... (off to contact 987..)
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Re: pic: FRC973 offseason teaser
Thanks for all the cool replies guys, we'll try to post another teaser tomorrow, and one more each week until we finish.
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as far as I can tell, just rule 92. It was a joke btw. |
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Re: pic: FRC973 offseason teaser
Reported
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