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pic: 2 speed tranny
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why not big cim little cim combo?
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Very nice, and very light! Is there a reason you switched to aluminum side plates and returned to bronze bushings?
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Re: pic: 2 speed tranny
Its hard for me to judge from the angle, but it looks like you will not have much room for an output sprocket due to the encoder. I could just be look at a bad angle. Whats the gear ratios?
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My question is, are the side plates going to be hogged out to save weight? Those are some heavy trannies! |
Re: pic: 2 speed tranny
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http://www.flickr.com/photos/jdebner...7594547502324/ here's a pic of last years bot. you can kind of see how where the tranny links to the center axel. .925:35 in low and 3:35 in high |
Re: pic: 2 speed tranny
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Re: pic: 2 speed tranny
Im with you on this one. 3.2lbs perside is quite light especially since your getting 2 speeds out of it. I do think you could get a bit more weight out of it though, maybe 3/16" sideplates?
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If that middle plate can be eliminated though, that would save weight and make it easier to machine (one less part). I can't really see what that plate's purpose is so I don't know how easy that would be. |
Re: pic: 2 speed tranny
The middle plate supports the shifting axle. If it were removed then that axle woudl have to be supported by the other 2 plates. When you shift, it would then hit the 70t gear.
We have both a cnc machine and an EDM, but some of the advisors were looking into using the AM Super Shifter this year to decrease machine time. When I designed this I had to keep this in mind and balance weight and machine time. |
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If I designed a drivetrain that only used two small CIMs and was able to push around all the multi-motor drivetrains in FIRST wouldn't that be a lot lighter and simpler than a drivetrain that used many motors?! Sorry about getting us off topic. I actually think this is a pretty nice transmission - a crash shifting transmission looks simpler to build than a dog-shifting one. I wonder why more teams don't do it. Why did you choose crash-shifting over dog shifting? |
Re: pic: 2 speed tranny
This transmission was meant to be an improvement on last years design which was smash shifting. I wanted to get something together before build so I went with what I had experience in.
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