Trying to write non blocking code, failing

[330R]

Here:

@fulstop

 if ((coderActive == 1) && (currentMillis - coderMillis >= coderDwell) && (inProcess == 3)) //CODER SIGNAL OFF
  {
    // Serial.println("coder off");
    digitalWrite(coder, LOW);
    coderActive = 3;
  }

you are not updating the timestamp.

If you write functions instead of putting everything in loop(), you can make static variables all named the same, instead of coming up with a thousand names for global variables. Remember to declare constants as const, it'll save some memory.