 
 #define STEPS_PER_MM 5000/232
 #define STEPS_PER_DEG 3760.0 / 180.0
+#define WHEELSPACING 110
 
 // equivalent to 1.8 * STEPS_PER_MM
 #define STEPS_OF_BACKLASH   39

  stepperL.move(-steps);
}

void buzz(int len)
{
  buzzEnd = millis() + len;

long sqr(long v) {
  return v*v;
}

