The operator takes the disc and inserts it into the embroidery machine , which reads the instructions for the machine. Ideal file formats are Adobe Illustrator files (ai, eps, pdf) or high resolution Adobe Photoshop files (psd, eps, tiff, jpg).Very fine details are often poorly tolerated when embroidering. I would recommend to take highest quality vector file before going embroidery. EPS is one of the best option to used for embroidery with the pure quality.