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Unread 05-03-2006, 20:36
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,515
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Re: pic: 696 Gearbox Transmission

Originally we had a 20 pitch 13 tooth gear that was supposed to be cut into a shaft so the gear and the shaft would be one. But, due to time constraints, we decided to press it on a 3/8" shaft. Well, that didn't go too well. The "wall" thickness between bore and root diameter was small and we cracked gears trying to press them on.

So, as it currently stands, the gear is on a 5/16" shaft with a 3/32 key and has the potential to be under 15 N-M of torque if somehow something jams up, and the motors stall, and the electrical system is briefly able to provide full current while the motors are stalled. I highly doubt that will ever happen, and I think we'll be alright, but the thought of a big shock load (like going from full forward to full reverse very rapidly) still scares me.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004