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pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I'm just looking at this thing in disbelief.
Have the Floridians just taken the title as king of the transmission-speed wars? (Yeah, I know, the thunderchickens had theoretically infinite speeds. Details, details.) |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
Wow, scary. UCF Regional should be interesting this year hehe.
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
Is this for real? Something about that picture is making me want to call shenanigans...
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
That gearbox is...insane...
Sorta overkill though. For this year, just 2 speed is good. High Speed for when going up and down the field and maybe a lower speed for more torque when carrying the tetra. But that gearbox is awesome, but looks sorta small, i see a person's thumb on top holding the gearbox. |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I have a feeling this is not an original assemblty made for the 2005 spam robot. I think they pulled it out of something else. The only problem with my theroy is I can't think of anything other than a big rig that would have 12 speeds, and in that case that would be a giant's thumb!
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
In the caption you specify that it is a 12 speed gearbox and a 3 speed shift on the fly gearbox. Is the 12 speed also shift on the fly... or does it have 12 predetermined speeds in which you can select 1 of those before a match?
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I am thinking he means it is kind of like a bicycle. Sort of. Without actually studying the picture I am guessing that he means that they can select any one of four ranges of gearing with the bot stopped, then when they are running they can select one of three settings within that range. Or maybe the other way around. Now that I think about it, it really doesnt have anything to do with a bicycle, but whatever.
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
Oh, ok. I didnt read the caption, and our team doesnt do gearboxes. Our highest precision tool is a sawzall, because our wood bandsaw, wont seem to cut straight through aluminum. It works ok through thin steel though (having a wood blade on really helps!) :D
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I did mean two seperate things... a twelve speed... and a three speed shift on the fly. Now that I think about it I am also calling "shenanigans" I don't see a four speed necessary let alone a twelve speed, it is ridiculous over-kill. Good try SPAM guys. Probably the best teaser I have seen yet.
-Henry |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I can neither confirm nor deny any knowledge of this, except:
1) I have seen and touched it 2) This is a true 12 speed gearbox. 3) You can barely see the bronze shifting mechanism in the shadows in the back. We wouldn't want to give EVERYTHING away. 4) One of our sponsors (the one who owns a machine shop) now has a son on the team and apparently has time to tinker. 5) The "Jones&Jones" 3 speed shift on the fly gearbox is equally as sweet. |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
maybe i am stuck in the past but why would you need to have more then a 2 speed transmission. the field is not that long
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
lol I call shenanigan as well, I bet they're still going w/ holonomic heh.. this is either and amasingly awesome gearbox, or its taken out of something that has around 12 speeds..
like a blender, or a giant egg beater.. or maybe some other sort of kitchen appliance. :-P |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
4 speed is good, but 12 is overkill.
It is trying to achieve CVT like performance, but at the speeds these robots move, it would spend too much time shifting to come anywhere near the efficiency of a CVT. |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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/anxious |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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I know team 180 (SPAM) pretty well. They have always built a simple machine which dominates at the competition. they are not that crazy to do a 12 speed transmission. They are doing a 3 speed transmission which shifts on fly. Thanks for giving it out Gary. - Arefin. |
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
well I can't say much either but I will say just as Dillard has: I've seen it, touched and and looked at it. S.P.A.M. is just wonderful what can I say. 12 speeds yeah we have nothing better to do with our time along with many other projects we do in the fall.
So yeah 12 speeds seems a bit much but hey it's us Speed Power and Maneuverability that's what S.P.A.M. is all about. :) |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I'm a bit confused by the number twelve. With the most common shifting designs, you'd expect a 2^n number of gear ratios. But... 2 x 2 x 2 = twelve? They'd have to be doing something pretty ingenious.
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
Maybe those are the most common shifting designs in the FIRST world, but when you look at the much larger world of engineering, there are numerous 5 and 6 speed car transmissions and I believe 18-wheelers have 12 speeds.
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
I am still sticking with this... The 12 speed is not meant to be used in competition. And somehow IF it were it is NOT a shift on the fly...or shift at all for that matter. It would be a pre-match selectable gear. The three speed shift on the fly IS their gearbox for the drive tain. PERIOD
-Henry |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Gary DID say this thread might be ripe for the rumor mill :D (But seriously now, would S.P.A.M spread rumors? :ahh: ) ...Arefin, have you been spying?!?! :p |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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The gearbox was built by Cory and his uncle for a "Barbie car" design they have been experimenting with. It can carry a pre-k child ~50lb. The front wheels steer and they've tried several combinations of all-wheel drive, by using 1 and 2 of these gear boxes. Cory tells me he powered it with a "big" RC car motor. The car is currently torn down and is one of his "once-in-a-while" projects. Why 12 speeds?...ah heck...why not? ;) Eric |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
THIS IS CARZY
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
but hey it's a cool thing. 12 speeds yeah it looks like a grandfather clock--but ya know we all like to get a bit crazy and have some fun--and we just had to tease y'all. just having fun during this crazy build season. what we are really up to at home in our bit well umm.... that's a different story.
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