Thread: Robot Speeds - Opinions sought
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Unread 23-06-2002, 23:03
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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guessing on ratios
Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 2/7/2000 1:17 PM MST


In Reply to: Robot Speeds - Opinions sought posted by Thomas A. Frank on 2/7/2000 9:16 AM MST:



4-6 feet per second...

hmm...

okay, with an 8 inch wheel thats about 2-3 rev per second or 120-180 RPM

The Drill motors has a free speed of about 20,000 RPM so...

From Drill motor to 8 inch wheel we'd be talking about a 170-110 to 1 ratio.

I suppose that is about right.

With the transmission in low that would mean about a 2 or 3 to 1 ration from the output of the drill trans to the wheel.

Every year I tell a bunch of rookie teams that your robot shouldn't be able to out-run you, but it should probably be able to make you walk kind of fast. Somewhere in between is the right ratio.

The 4-6 ft per second falls into that range.

What ratio will Chief Delphi V have? Not ready to commit yet ;-)

Joe J.



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