We will find the port to which the cutter is assigned by first opening Device Manager on your computer. Our Cannot Open Ports article may also help in understanding how your specific equipment should be connected. However, some directions may vary depending on the equipment being used. Users of other cutters may find these instructions helpful by substituting all model specific information with that pertaining to their own machines. This article instructs users of the Vinyl Express R-Series cutter on how to identify the port to which your R series cutter is assigned.