Posted by Justin Stiltner at 1/22/2001 1:24 PM EST
Student on team #388, Epsilon, from Grundy High School and NASA, American Electric Power, Town of Grundy.
In Reply to: Re: Joe's post
Posted by Samuel Lindhorst on 1/22/2001 11:54 AM EST:
: : Joe Johnson posted it a while ago:
: : -----------------------------------------------------
: : The gear is a 12 tooth, 16 diametral pitch, 20 degree
: : pressure angle, stub tooth.
: : This gear can mate with a standard gear by either
: : increasing the center distance a bit. This increases
: : the backlash a bit too, but nothing too bad considering
: : the typical FIRST robot. Another method is to shaft off
: : .4/D.P. (in this case .4/16=.025"

the diameter of a
: : standard gear. Alternatively, you can have a stub gear
: : cut from legal kit materials.
: : Joe J.
: : P.S. Come to think about it, the last option is the
: : only real option this year since, to my knowledge,
: : mating gears (standard, stub or otherwise) are not sold
: : by Small Parts and gears are not on the Additional
: : Material List.
: Thanks Ken. I'm begining to heartily dislike Small Parts as a sole source. I like their people, who are sweethearts on the phone and helpful, but the catalog just has too many tools, which I can get anywhere, and too few things I'm looking for. I think we should have available a gear to match every output pionion in the kit.
: Well, now that there's no hope of finding a mating gear,I think it's easier to cut a sprocket to either fit over the gear, or cut the gear away and press on a sprocket. Or give up and use a van door motor...
Would it be legal to pull the sprocket off the shaft of the motor and put a different one on??
Justin Stiltner
Team #388