I have tried to adjust the bobbin tension to no avail. The machine was sewing just fine then started to bunch underneath. The lower tension is obviously the problem. I re-threaded, cleaned and changed the needle. I hadn't used the machine often when this started to occur. The last thing I sewed on it was polar fleece but I was always careful to clean the machine after use. I haven't been able to use this Pfaff for years. I really need my machine back. I am hours from the nearest Pfaff dealer and as a single Mum I am too broke to pay for the service/repairs. If anyone has any suggestions, for home repair, I would appreciate them.
You may need to take off the housing that covers the whole dog mechanism. You will need a screwdriver to do this. Blow out the area around the tension gears and dogs, check for loose or disconnedted parts, and re-oil the gears. Fleece fuzz usually collects where you can't see it. This was the problem with my machine that had the same symptom.
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bunching underneath is an indication that the top tension is incorrect
switching projects and materials also that attention has to be given to tension adjustment both bottom and top
the catching sometimes indicates that a tension is too tight and is pulling the needle out of line
Grasp the threads and hold them down when you start your seam. If it still happens make sure your thread is seated into your upper tension mechanisms. If that still isn't solving your problem... CLEAN between the tension discs with some sturdy fabric folded in half. (wax build up from threads can cause issues)
I had similar problems when I first started sewing. Try adjusting the tension in your thread - less tension for lighter fabrics, more tension for heavier fabrics. This will stop the needle from pulling the threads in the fabric.
As for the thread getting bunched up in the bobbin - this is most likely because your bobbin is the wrong size for the machine, or that you did not thread the bobbin properly. Try re-threading, this time making sure you pull the thread into the bobbin container tightly. This should stop the bobbin from jumping around the container and spitting thread.
Yes, it does. There are a couple of reasons the bobbin thread could be bunching up on the underside of the fabric. It could simply be that the machine needs cleaning. Take the bobbin assembly out, brush all the old lint out as best you can, reoil the machine once it's all clean, and make sure there aren't any little bits of thread caught in the bobbin assembly. Rethread the machine (carefully) and change the needle. This solves the problem usually--especially if the machine was sewing along fine and the problem develops suddenly. '
The other thing to check is your tension. It could be that the top tension is too loose. But different color thread in the top and in the bobbin, stitch a few inches (be sure to held the top and bobbin thread ends behind your needle as you start to stitch) and check. WIth the pressure foot down, adjust the tension, and stitch again. Keep stitching, checking, and adjusting until you see little if any bobbin thread on the top or top thread on the bobbin.
Another thing to reminder: use the appropriate thread and needle for the fabric you're sewing.
Let me know if this works, ok?