Problem with USB connection to your Duplicator i3
1. You need to set the baudrate to 115200.
The printer can not connect to the computer directly. The customer need to set the Baudrate and the port manually.
Important notice: There are many factor may interfere the direct USB link printing can cause
stop in the middle. The Micro SD card printing is highly recommended.
2. If this does not help you should try another USB cable.