Hi, to all I have started a CNC project using UNO R3 and Adafruit Shield L293D. Here is my equipment: Arduino UNO R3 Adafruit shield Motor L293D 5 - 25 V dc capacity Stepper Motor NEMA 17, 5 - 12 Vdc Stepper Motor 0404A 24.2 V dc External PWR supply 24 Vdc Software used: Arduino 1.6.11 Grbl 0.9j Universal Gcode Sender 1.0.9 Issues: When I used the arduino multiple stepper testing from the arduino library, the 2 motors is working fine. But when I used the Universal Gcode Sender, motor is not responding at all. Everything is working fine from Arduino to Grbl. Please see attached file.