Brands of Overlock Sergers, Chain Stitch & CoverHem Stitch Sewing Machines |
Sergers operate differently from sewing machines. There are normally 2 needles and 2 loopers for mock safety stitch (except 5 thread chainstitch or coverstitch sergers). All 4 must be threaded for stitches to form, pulling all 4 threads above the plate and under the foot TO THE LEFT before starting to sew. Turn the handwheel over the top toward you, counter-clockwise and you should see loops, stitches forming around the stitch fingers. Lift the foot and put fabric under the foot, lower the foot, make a couple of stitches by turning the handwheel before stepping on the foot control. If you still don't have stitches, then change the needles and try again. If something is not threaded, follow the guidelines: The correct order of threading is 1) upper looper 2) lower looper thread must go through the eye then OVER the upper looper. 3) needles in either order. If just the upper looper is unthreaded, rethread it and proceed. If just the lower looper is unthreaded, you need to clip the needle threads, thread the lower looper, then re-thread the needles. This is because, in the formation of the stitch, the needle threads are draped around the lower looper. So, if you thread the lower looper without removing those needle threads, they cannot slip off the end of the lower looper when you start to sew. The threads will break and you have to start over. Rather than clipping and unthreadng the needles, you can pull the tails of the needle threads up above the needle plate. This will remove them from the lower looper. It takes a little time to get used to the serger, but you will love it once these procedures become second nature.
How to Thread a Serger Machine
How to Sew: Using a Serger : Introduction to the Serger Sewing Machine
Serger Stitch Configurations (.PDF)