This video shows you how to set up your Juki MO654DE serger to sew a rolled hem. These instructions can also be used for a Juki MO644, a Juki MO655, and many other machines.
I had a problem with the rolled hem with the wooly nylon thread...on the back side of the fabric it came out like some stitches were pulling out a little bit of fabric...i wish I could send you a picture to see what do you think