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Unread 29-01-2012, 22:51
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JohnFogarty JohnFogarty is offline
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Re: pic: Encoder Graph

@BitTwiddler
This is a test motor to work with the functions at a low speed your number actually sounds correct. I think the motor I was using at the time was a CIM with a banebot gearbox 14:1 gear reduction.

@Ether I had posted this before we had that discussion in the PID thread. thank you though.

What I was doing was testing the reliability from the data I can receive from the US Digital Encoders.
From there I am looking at implementing a PID "style" Velocity control method.
I am going to use a value read from a Ultrasonic sensor to correspond to a value of "SPEED by encoder" loopup table to activate a controlled speed for the shooter, I found out this was necessary when we were testing out shooter and discovered after each shot there was a bit of time where the motor had to power back up to reach maximum velocity again.
Now our shooter only needed about 45% power to shoot the high basket from the key, at that low rate of power the "recharge" time was a little long, and I also realized throughout the match your battery voltage will deteriorate making the power% inaccurate. I want to be able to set a speed that I have determined through trials and tested encoder RATE/SPEED data to make my power management of the victor autonomous/automatic. Hense a PID Velocity control method.
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John Fogarty
2010 FTC World Championship Winner & 2013-2014 FRC Orlando Regional Winner
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Former Student & Mentor FLL 1102, FTC 1102 & FTC 3864, FRC 1772, FRC 5632
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