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 We all know that with mechanical systems, once all the noise has leaked out, the system quits (therefore quiet running mechanical systems last much longer :^) - KenWittlief [more] |
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By: Mike Hendricks
New: 02-16-2006 12:45 AM
Updated: 02-16-2006 12:45 AM
Views: 587 times
Start off, with a IFI Transmission kit. Turn down the centers of the internal gears (not shown in this picture, but there are pictures from other teams who have done it here). Next, take the output sprocket, and turn that down. Turn it down A LOT. The end result, is a sprocket thats .4 lbs lighter, and combined with the cutouts on the internal sprockets, knocking a pound off EACH transmission.
According to our machining mentor, the sprocket will still be fine. He's a machinist at the local nuclear power plant, so we generally try to trust him. My jaw dropped when I saw these done.
Discussion
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02-16-2006 07:26 AM
DjAlamose
Re: pic: Team 1388: Loosing weight
Wow looks great! Now try doing that to about 30-40 gears on the entire robot, I know we had to. Drilling holes in them also helps. But I wonder.. is this for your drive train or something else...
02-16-2006 08:05 AM
Greg Perkins
Re: pic: Team 1388: Loosing weight
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Originally Posted by DjAlamose
Wow looks great! Now try doing that to about 30-40 gears on the entire robot, I know we had to. Drilling holes in them also helps. But I wonder.. is this for your drive train or something else...
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02-16-2006 08:43 AM
Ben Piecuch
Re: pic: Team 1388: Loosing weight
Wow! That's a very thin wall section over the key. For an arm application, I would be cringing over it. For kit drive, I'd think it's borderline. We did the same think with the kit tranny last year, and it easily saved 2+ lbs per side.
However, I'll point you to a pic of our robot (or a part of our robot) after a slew of competitions. Beware of those thin walls!
228's shattered arm gear
Best of luck!
BEN
02-16-2006 09:24 AM
DjAlamose
Re: pic: Team 1388: Loosing weight
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Originally Posted by Greg Perkins
Do I dare ask why you have 30-40 gears??? I mean how many transmissions do you have?????? I remember we had a 100 tooth x .5" wide gear on our 2002 robot that started at about 15 pounds and finished about 5 pounds. But I seriously don't know why you would need 30-40.
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02-16-2006 03:12 PM
Lil' Lavery
Re: pic: Team 1388: Loosing weight
Custom transmissions, such as 116's old transmission (http://www.chiefdelphi.com/forums/pa...le&paperid=205) often have 10+ gears in them alone. Combined with any gearing (or sprocketing more likely) that happens after the transmission, on arms, etc, it is quite likey to hit 30 gears/sprokets on a robot, if not more. I mean, just look at 118's 2005 bot, "Chainzilla".
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