Question about PfaFF Quilt & Craft Pro 7530
Hi :) How did you check the bobbin tension? The thread should come through to the top side. So let's take a check here and see what is going on.
Take the bobbin out. Take a hold of the thread and suspend the bobbin (in the case) underneath it. Still holding on to the thread let it dangle. Does it reel out to the floor or does it drop a bit with some resistance and sort of stop? If it doesn't fall to the floor with thread between it and you then there is some tension to the bobbin.
Proper bobbin tension, when doing the above, dangling the bobbin by the thread, should allow some thread to come out but not reel out. If it drops a lot then there isn't enough tension. Look for the adjustment screw and tighten it until it behaves as it should when testing. Then place the bobbin back in the machine, listen/feel for the 'click' when it's in proper place. By the way do make sure that the thread was wound evenly around the bobbin and that it was doing in the right direction when it's in the bobbin case.
Now let's look at the top thread. Totally unthread the top side and rethread it again making sure it is going through the guides and not catching/looped. After putting it through the upper tension pull on the thread and feel the resistance. Again it should pull through and not break but there should be some resistance. Now thread the needle.
Get some scrap fabric, doubled as if you're sewing a seam. Set the machine to an medium stitch length and a wide zigzag. Sew a few inches and take the material out to exam it.
The top and bottom stitching should look identical. Make sure you remember which is the top side and which is the bottom. Turn the fabric over and examine the bottom side. Do the two sides look the same? Are the stitches neat with the thread going through to the other side at the outside of each zig with no thread from the other side coming towards the middle? If one side is drawn up, puckered than the thread tension of the other side is too tight. And if one side has thread drawn through going towards the middle that opposite side tension is too loose.
Remember to think in opposites. The bottom side of the stitch is effected by the tension on top, ie through the needle. The top side is effected by the bobbin tension. Often people assume that if the underside of the stitch is loopy or loose looking the bobbin is too loose when actually it is the top side that is too loose (or the bobbin tension way too tight).
Try this and see if this will fix your problem ---- or I didn't understand your description correctly...
Posted on May 28, 2011
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Posted on Jan 02, 2017
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