Thread: pic: Iso view
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Unread 07-09-2004, 16:27
Unsung FIRST Hero
JVN JVN is offline
@JohnVNeun
AKA: John Vielkind-Neun
FRC #0148 (Robowranglers)
Team Role: Engineer
  
Join Date: May 2001
Rookie Year: 2000
Location: Greenville, Tx
Posts: 3,159
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Re: pic: Iso view
Quote:
Originally Posted by Rod
I figured the the top speed at 50% of the CIM free speed
Common mistake.
The motor will run muuuch faster than Max Power.

I usually use a "speed constant" of 85%.
Basically, gear the robot based on .85*free speed or in the Chips case: 4675RPM

Real world testing of my theoretical calculations shows this to be about right.

More accurate drive modelling can be done, but this simple method comes out pretty good. Then again, your milage may vary depending on your drivetrain.

Anyone else wanna confirm 85%?

JV

Edit:
See Andy's post below.
I guess I'm a little fast. Oops.
/Edit
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Last edited by JVN : 07-09-2004 at 17:08.