If you’ve followed this guide to the letter and still encounter failure, capture a screenshot of your Device Manager (with COM ports expanded) and email Redsail official support. Most likely, a simple firmware update or port reassignment will solve the case.

(e.g., COM3 or COM4). You will need this for your cutting software. Step 2: Install and Configure Your Software

WinPCSign is a robust professional vinyl cutting software option that offers native drivers for Redsail plotters. Installation Steps

If your Redsail package came with a software disc and a separate USB device, you will need to plug this USB dongle into an available port before launching the program to deactivate any missing security prompts.