Potentiometer help - from ROBOTC forum

[jpearman]

Hey guys, my team and I recently switched to RobotC and while the switch was pretty fluid, we are stuck on this one problem. We need a motor to stop when a potentiometer reaches a certain reading. We tried:

if (SensorValue[pot] > 3508)
{
motor[swerve] = 0;
}

Previous in the program we link that motor to:

motor[swerve] = vexRT[Ch1];

However, once that potentiometer reading is hit, the motor stops temporarily but goes on to twitch past if the joystick is held. Is there anyway to have it so that the joystick can be held but the motor does not go past that point? And if not, how could we program it so that the motor goes until it reaches that point then stops?

Any help would be much appreciated.

Most of us cannot port in the official forums so I reposted your question here. The general idea will be to limit the control value that you send to the motor when trying to go beyond the potentiometer value, something like this.

#pragma config(Sensor, in1,    pot,            sensorPotentiometer)
#pragma config(Motor,  port1,           swerve,        tmotorVex393, openLoop)
//*!!Code automatically generated by 'ROBOTC' configuration wizard               !!*//

task main()
{
    int drive;
    
    while(1)
        {
        // Get joystick if outside deadband
        if( abs( vexRT Ch1 ] ) > 10 )
            drive = vexRT Ch1 ];
        else
            drive = 0;
        
        // kill drive if pot value is large and joystick is positive
        // assumption here is that positive drive make the pot's value increase
        if( (SensorValue pot ] > 3508) && (drive > 0) )
            drive = 0;
        
        // now set the motor
        motor swerve ] = drive;
        
        wait1Msec(20);
        }
}