I love my Bernette 009DCC coverstitch machine and I have used it plenty.
I bought it last year to complement my serger and sewing machine and it is wonderful for hemming. For anything else, well not so much.
You see, every time I get it setup and ready, I grit my teeth as I reach for the garment I am working on. Occasionally it hums through its work and I smile happily thinking I have finally ousted that blasted moody little gremlin. But more often than not I end up ripping out more stitching than I leave in and sometimes I have to down tools and put myself in Time Out with a very large glass of wine.
Where I run into consistent difficulty is top stitching bound edges on knit tops, particularly around the armholes and neck. Now this is one of the main reasons I bought the machine so I have to figure it out. I have played with tensions, differential feed, stitch lengths, presser foot pressure, switching thread, needles and so on to no avail. As soon as I stretch or pull/push a little as I guide the fabric under the presser foot, the stitches go wonky. Short. Long. Bunched. Skipped stitches singly or series of skipped stitches. You name it.
I must be doing something really really wrong and so I have finally bitten the bullet and booked a lesson with someone who actually knows what they are doing. Why oh why didn’t I do this sooner?
I’ll let you know how I get on.