To embroider on such a large embroidery field, a special aluminum frame is required. Of course, it is included in the standard equipment of the machine. To achieve the desired embroidery quality when embroidering in the maximum field, it is recommended to extend the machine table with additional side supports to eliminate the influence of machine vibrations. The ability to work in such a large working area limits the speed of the machine, which can embroider up to 1000 stitches per minute on hoops and up to 850 stitches when embroidering on an aluminum frame. The way the machine is controlled and the user interface - despite the increased potential of the embroidery machine - are not been complicated and are identical to the HCD3E 1501 model. All Happy hoops are compatible with each other and can be used in all embroidery machine models. In addition, Happy embroidery machines are also compatible with Tajima embroidery hoops.