Chief Delphi - Program Motor to Make One Exact Revolution

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r0306

01-02-2013 19:28

Program Motor to Make One Exact Revolution

We're using a 12V Tetrix Motor connected to a spike. Right now, we're trying to program the motor so that it starts and ends in the exact position but it never seems to do so. Please help.

Here is the current code we're using:

Code:

            if (leftStick.getRawButton(3))

            {

                              

                    piston.set(Relay.Value.kForward);



                    new java.util.Timer().schedule(new TimerTask() {          

   

                    public void run() {

           

                        piston.set(Relay.Value.kOff);

                            

                   }

             }, 1000L); //motor spins for one second

               

            }

9072997

01-02-2013 19:37

Re: Program Motor to Make One Exact Revolution

I believe you will need some kind of encoder to achieve that (unless your motor has one built in).

Ether

01-02-2013 20:30

Re: Program Motor to Make One Exact Revolution

Quote:

Originally Posted by 9072997 (Post 1226125)

I believe you will need some kind of encoder to achieve that (unless your motor has one built in).

You'll also probably have to control it with a speed controller, not a relay.

FrankJ

01-02-2013 21:37

Re: Program Motor to Make One Exact Revolution

If this is for this year's competition--the tetrix is not legal for FRC. It seems it would be difficult to consistently get one revolution just on time. Maybe add a limit switch?

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