Stepper Kill Switch

Using Arduino Motors, Mechanics, Power and CNC
6

I haven't got time to look through all that code but in principle you have

loop () {
    read_switch_code();
    control_motor_code();
}

read_switch_code() {
    // code to read a switch
}

control_motor_code() {
   // code to control the motor
}

and the switch and motor parts of the code do not interact in any way.

This can be changed to something like this

boolean kill = false;

loop () {
    read_switch_code();
    control_motor_code();
}

read_switch_code() {
    // code to read a switch
   if (switch is set)
     kill = true;
}

control_motor_code() {
   // code to control the motor
   if (kill)
     stop the motor
}

Now the switch code can tell the motor code what to do.

Rob