Are you a CNC beginner facing challenges when connecting your Costycnc machine for the first time? In this video, we tackle common issues that often leave beginners stuck, such as connect and selecting the correct baud rates. Learn step-by-step solutions to overcome obstacles like disconnecting and reconnecting the USB cable when a port is already open. Discover the nuances of CNC Shield v4.0 with Arduino Nano and ATmega328 communication, and avoid pitfalls like overlooking the 'Here Need GRBL' prompt. Watch to ensure a smooth connection and dive into the world of CNC without the frustration. Don't forget to like, share, and subscribe for more helpful CNC tips!