The following symbols are used in this manual to ensure the proper use of the cutter and to prevent the cutter from being damaged. A wide variety of cutting plotter 721 plotter cutter options are available to you, such as paid samples. Liyu is the best quality cutter from china. Step 1, download the cutter driver onto your computer. If this model is not selected the cutter plotter will not cut. Modified friction feed rollers on us cutter mh721 refine to accept 24x18 sheet yard sign coroplast.