pic: Spectrum Fall 2013 Drivetrain

[donkehote]

Originally Posted by AllenGregoryIV

Yes but where do I get pulleys with the 6 hole pattern already machined (and preferably with versakeys)? Aren or Paul want to chime in here?

andymark?

http://www.andymark.com/product-p/am-2234.htm

we used these in our shooter this year. worked great! I would love to see more sizes available in plastic. Buying from gates in canada takes a long time, and is far too expensive. Still did it this year though, and it was worth it.

[AllenGregoryIV]

Originally Posted by donkehote

andymark?

http://www.andymark.com/product-p/am-2234.htm

we used these in our shooter this year. worked great! I would love to see more sizes available in plastic. Buying from gates in canada takes a long time, and is far too expensive. Still did it this year though, and it was worth it.

Thanks Kevin, I should have clarified, that I was looking for more sizes that just the 42t AM pulleys.

[AdamHeard]

OH yeah! GT2 or HTD pulleys with a versakey pattern! Aren make it happen!

[DampRobot]

Originally Posted by AdamHeard

OH yeah! GT2 or HTD pulleys with a versakey pattern! Aren make it happen!

I'd be surprised if this wasn't already in the works at IFI or at other suppliers.

[Ajennings8896]

Looks like a really good drivetrain, I'll have to have my team look at this and maybe try something new this year. We usually just use the standard drivetrain but this looks like something we could do this year.

[cadandcookies]

Originally Posted by AdamHeard

OH yeah! GT2 or HTD pulleys with a versakey pattern! Aren make it happen!

This. Please. Please. Please. (If we keep asking does the chances of it actually happening go up).

The only current problem with belts (at lease in my opinion) is that pulleys require decent amount of post machining to be utilized the most effectively. COTS FIRST-standard pulleys would fix that (as I understand it there's something about licensing the tooth profile that stands in the way, but mon dieu if this could happen it would make my 2014 build season).

[donkehote]

Originally Posted by AllenGregoryIV

Thanks Kevin, I should have clarified, that I was looking for more sizes that just the 42t AM pulleys.

I wish there were more sizes too. Ive been thinking of cadding up a drivetrain using only gears, but I could never justify the weight when compared to the same thing with the plastic 42 tooth pulleys and 15mm belts. Always liked the idea though.
How are you planning on adjusting the backlash on all those gears, or are you not worried. I cant see it being a major issue, but i thought id ask.

[AllenGregoryIV]

Originally Posted by donkehote

I wish there were more sizes too. Ive been thinking of cadding up a drivetrain using only gears, but I could never justify the weight when compared to the same thing with the plastic 42 tooth pulleys and 15mm belts. Always liked the idea though.
How are you planning on adjusting the backlash on all those gears, or are you not worried. I cant see it being a major issue, but i thought id ask.

I agree that belts would be lighter, though we really haven't had a weight problem the last two years. We actually have been struggling to get up to 120lbs, to get more traction. Right now I would take the smaller footprint over the lesser weight option.

I haven't thought about the backlash, several teams have done gear drives and haven't mentioned it being a problem.

[IndySam]

Originally Posted by AllenGregoryIV

I agree that belts would be lighter, though we really haven't had a weight problem the last two years. We actually have been struggling to get up to 120lbs, to get more traction. Right now I would take the smaller footprint over the lesser weight option.

I haven't thought about the backlash, several teams have done gear drives and haven't mentioned it being a problem.

Backlash, what backlash? Not a problem. Also we were under 80lbs this year so weight wasn't a problem for us.

The new small drive size was one of the factors that made a gear drive practical this past year in both weight and cost.

[Seth Mallory]

Originally Posted by AllenGregoryIV

I agree that belts would be lighter, though we really haven't had a weight problem the last two years. We actually have been struggling to get up to 120lbs, to get more traction. Right now I would take the smaller footprint over the lesser weight option.

I haven't thought about the backlash, several teams have done gear drives and haven't mentioned it being a problem.

I like your effort for making a smaller footprint. For the last couple of years 192 has been working to reduce the footprint in a different way. For those that know 192 you will be shocked to hear that the students have a new gear box that should be more space saving then the last 2 years.

Originally Posted by Seth Mallory

I like your effort for making a smaller footprint. For the last couple of years 192 has been working to reduce the footprint in a different way. For those that know 192 you will be shocked to hear that the students have a new gear box that should be more space saving then the last 2 years.

More than the last two years?! I can't wait to see this. Any idea when this super-compact transmission will debut?

[Seth Mallory]

As a mentor I cannot release that information. That is up to the students. Announcing that we are building a new gear box is not news as in last 12 years the students have designed and built new gear box's all but 1 year. Gear box's are a great engineering project for students.