I bought another pair of stepper motors/drivers, the same used before,and duplicated the firmware (From master downloaded 15082016). The old version runs fine on a mega, but there seems to be something wrong with my pinmapping on the new versions, because all I get are cute beeeeeep booop sounds when trying to use the pen move function.

I have testet the steppers with this sketch, and they both run fine
https://codebender.cc/sketch:371879 with that code.

The settings in my configuration file is as follow (I am using the #define UNL2003_DRIVER option)

#define motorPin1 4 // Blue - 28BYJ48 pin 1
#define motorPin2 5 // Pink - 28BYJ48 pin 2
#define motorPin3 6 // Yellow - 28BYJ48 pin 3
#define motorPin4 7 // Orange - 28BYJ48 pin 4
// Red - 28BYJ48 pin 5 (VCC)

#define motorPin5 8 // Blue - 28BYJ48 pin 1
#define motorPin6 9 // Pink - 28BYJ48 pin 2
#define motorPin7 10 // Yellow - 28BYJ48 pin 3
#define motorPin8 11 // Orange - 28BYJ48 pin 4
// Red - 28BYJ48 pin 5 (VCC)

AccelStepper motorB(8, motorPin5, motorPin7, motorPin6, motorPin8);
AccelStepper motorA(8, motorPin1, motorPin3, motorPin2, motorPin4);

I switched from mega to uno, so The pins Are different, but as I said the pin setup works fine when running the codebender sketch.

I already changed the penlift pin
const byte PEN_HEIGHT_SERVO_PIN = 13; //UNL2003 driver uses pin 9

but I'll try commenting out penlift entirely.

And yes, you are correct in that my use of this forum is an attempt at trying to figure out how to solve this problem, by trying to find others who have worked with the uln2003 option. I am sorry if you find that annoying.