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Unread 16-01-2017, 14:52
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AKA: Sam
FRC #0841 (Biomechs)
Team Role: Mentor
 
Join Date: Apr 2016
Rookie Year: 2009
Location: California
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Re: Machining precision required to make custom gearboxes

Quote:
Originally Posted by FrankJ View Post
A little OCCD
A lot of OCD and a quality drill press. Even with the plates clamped together, our drill press isn't straight/rigid enough for me to be comfortable with 841 trying this [with aluminum gears].

Quote:
Originally Posted by Cory View Post
Much more valuable to expend that effort on other areas of the robot.
Yes. Highly recommend finding the extra ~$100-200 to buy-not-build.

Quote:
Originally Posted by JesseK
...oblong holes...
Consider milling undersize and finishing with a 1.1250" reamer - biting the bullet and getting a reamer has allowed 841 to use our not-super-rigid benchtop tools to rough out bearing holes at the right location (on say a WCD rail or mechanism arm) quickly and a little undersized, and then finish the holes to a really nice bearing fit.
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Mentor - Team 841 (2015 - ? )
Mentor - Team 4 (2013 - 2014)
Student - Team 192 (2009 - 2010)
Work:
SunPower Systems, Product Engineering - Utility Power Plants (2015 - ? )
BSci, Mechanical Engineering, UCLA (2010-2015)
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