Chief Delphi - solenoid problems

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- - solenoid problems (http://www.chiefdelphi.com/forums/showthread.php?t=83192)

solenoid problems

I need help with Programming the solenoid to a the trigger button on our controller it will be on the kicker joystick.

Code:

package edu.wpi.first.wpilibj.templates;



import edu.wpi.first.wpilibj.Joystick;

import edu.wpi.first.wpilibj.RobotDrive;

import edu.wpi.first.wpilibj.SimpleRobot;

import edu.wpi.first.wpilibj.Timer;

import edu.wpi.first.wpilibj.Watchdog;

import edu.wpi.first.wpilibj.Compressor;

import edu.wpi.first.wpilibj.Jaguar;





public class Demonized extends SimpleRobot {



    private static final long TIME_DELAY = 1000; // in milliseconds

    RobotDrive drive = new RobotDrive(1, 2);

    Joystick leftStick = new Joystick(1);

    Joystick rightStick = new Joystick(2);

    Joystick kicker = new Joystick(3);

    Watchdog fenrir = Watchdog.getInstance();

    Compressor fluffy = new Compressor(1, 1);

    Joystick leftstick = new Joystick(1);

    Joystick rightstick = new Joystick(2);

    Jaguar spot = new Jaguar(4);

    Joystick pup = new Joystick(4);

   

    void setUpRobot() {

        fluffy.start();

        fenrir.feed();

    }







    public void autonomous() {

        setUpRobot();

            while (true && isAutonomous() && isEnabled()) {

                for (int i = 0; i < 4; i++) {

                    fenrir.feed();

                    drive.drive(0.5, 0.0);  // drive 50% fwd 0% turn

                    fenrir.feed();

                    drive.drive(0.0, 0.5);  // drive 0% fwd 50% turn

                    fenrir.feed();

                    drive.drive(0.0, -0.5); // drive 0% fwd -50% turn

                }

            }

            drive.drive(0.0, 0.0); // drive 0% fwd, 0% turn   

    }

    public void operatorControl() {

        setUpRobot();

        while (true && isOperatorControl() && isEnabled()) // loop until change

        {

            drive.tankDrive(leftStick, rightStick);

            Timer.delay(0.005);

            fenrir.feed();

            

           // New compressor code...

if (fluffy.getPressureSwitchValue()) {

fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOff);

} else {

fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOn);

}





            

            

        }

    //And don't forget to turn the compressor off when exiting your operatorControl loop...



fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOff); 

}

}

help will be much appreciated.

Re: solenoid problems

What's the point of this:

Code:

if (fluffy.getPressureSwitchValue()) {

fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOff);

} else {

fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOn);

}

Also, this was our code when we were using pneumatics for our kicker:

Code:

if (System.currentTimeMillis() - lastFired >= 2000) {

                if (j.getTrigger() && !fired) {

                    fire();

                    fired = true;

                    lastFired = System.currentTimeMillis();

                } else if (!j.getTrigger() && fired) {

                    fired = false;

                }

            }

            try {

                Thread.sleep(50);

            } catch (Exception e) {

                System.out.print(e.getMessage());

                e.printStackTrace();

            }

Where fire() launches the solenoids and fired is a boolean set to false and lastFired is a long set to 0. This code also makes sure you can only fire once every two seconds.

Re: solenoid problems

if (fluffy.getPressureSwitchValue()) {
fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOff);
} else {
fluffy.setRelayValue(edu.wpi.first.wpilibj. Relay.Value.kOn);
}

this will i believe to turn off the compressor
(have not yet tried it yet)

also is the only import we need is

import edu.wpi.first.wpilibj.solenoid;

right

thanks.

Re: solenoid problems

How can I implement that into my code.

Re: solenoid problems

Quote:

Originally Posted by Twisted eric (Post 924716)

First of all, instead of doing "edu.wpi.first.wpilibj.Relay.value.kOn", isn't it much easier to just to "Relay.value.kOn"?

From what my team assumed, the compressor automatically turns on/off, depending on the pressure switch. We initially couldn't get it to work, but it turned out to just be a bad spike. So I'm not really sure if you need to be turning it on/off.

As for the solenoid, yes all you need to import is

Code:

import edu.wpi.first.spilibj.Solenoid;

Depending on how you've connected your solenoid(s), you will have to set them true or false to get it to work as you wish.

Hope that helped.

Re: solenoid problems

After you import the solenoid class, you will have to create your solenoid objects in Java. You can do this using :

Solenoid kicker = new Solenoid ( slot, channel );

then in your program, you can check the status of the trigger using an "if" selection and use the set( boolean on ); method to turn the solenoid on.

Re: solenoid problems

Quote:

Originally Posted by KayyPii (Post 924975)

Can you please show me an example this is my first year programming in Java and I have no mentor to help.

Re: solenoid problems

Code:

Solenoid kicker = new Solenoid ( 7, 1 ); //locate a solenoid on slot 7 of cRio and channel 1 on the solenoid breakout.

if ( pup.getButton( Joystick.ButtonType.kTrigger ) == true ) //if the switch is pressed

         kicker.set(true); //turn on the solenoid

else

         kicker.set(false); //turn off the solenoid

That is pretty much our code for our kicker with the few changes to the variable names. Also, I believe that when you initialize the solenoid to channel 1, it is the first channel on the breakout board. I think its labelled as 0. Hope this helps :D