SOURCE: Tension
I answered this a couple days ago but don't know if it went through. I can sew through 6 or more layers of denim with my 226, no problems at all. In my 30 years in the upholstery business I never had a problem sewing leather, vinyl, canvas or multi-layers of fabric. The 226 Consew, the 111W and 211w Singers I had presented zero problems with heavy fabrics - and I don't consider vinyl "heavy".
You need to first of all check threading. If the machine's threaded wrong you're break thread. Also you need to oil under the bobbin case and the bobbin hook and the rest of the parts as well.
Then, loosen thread tension on top by turning the knurled knob that's on the spring that's holding the tension discs. Also loosen bottom tension on the bobbin case by turning the small, left-most screw on the outside of the bobbin case counter-clockwise. Do both with the presser foot down. Pull the thread(s) out and feel the tension. You should be able to pull the threads out with some little effort. Tighten both a little at a time until you get some tension. Run a couple seams and check where the threads meet in the fabric. They should meet in the center. Also check stitch length. If you're using 92 thread (is should be left twist), you should run the machine at about 6 - 7 stitches/inch. I'm running my machine at 5 - 5 1/2 with #69 nylon bonded, and 6 - 6 1/2 with #11 mono.
One more thing; if tension's too loose at the bobbin or top, the machine will jam in the bobbin and thread will break.
Go to www.consew.com and download a pdf owner's manual for free. You need to click on the 224. That machine, the 225 and 226 are the same.
SOURCE: I cant set the tension on my PFAFF 7570 the thread keeps
First make sure your needle is in correctly. Then make sure you are threading the machine correctly especially make sure you thread the take-up lever. Make sure your tension dial is at a 4 to 5. if this does not work, let me know
SOURCE: upper thread keeps breaking
the tension is too tight give it a little slack on the top.good luck.
SOURCE: PFAFF hobbymatic 935 bottom-thread keeps breaking.
The Pfaff hobbymatic 935 was a mid to late 80's production machine (proudly made in West Germany, LOL) and was a transition between the older "oil me or I die" style of machine and the more modern "maintenance free" machines. Only one part of the machine needs to be oiled from time to time, the track around the bobbin. One drop of oil should keep her from snagging and breaking. If that doesn't do it for you try a newer bobbin thread as old thread can become weak sitting on the bobbin.
Hope this helps!
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