Hi I've been having a heck of a time trying to hem a knit shirt.The
material is very stretchy and I've tried lightening the tension and
not pulling on it when sewing but I'm still getting a stretched out
ruffled like mess, I'm wondering if I'll ever get it right and am
considering tossing it out! Any help would be much appreciated.
This video has good information, but the fabric the sewer is using is NOT a KNIT fabric (one can see the unravel WEAVING along the cut edge). It is probably a STRETCH gabardine. The problem with doing a horizontal hem on a knit fabric is that if cut out correctly the stretchy part of the knit fabric goes in the same direction (parallel with) as the hem. I would experiment with a walking sewing machine foot and decreasing the pressure of my presser foot on my machine. Also, I would not try and put a very deep hem in this skirt.
PS The ruffled like mess is called "lettuce leaf" when a zig zag stitch is used, and a desired result sometimes when working with knits.