SOURCE: pfaff sewing machine
You don't have the thread in the take up lever or it is not in the tension. Rethread it , Pull the thread through the tension assembly and
test it to make sure the tension is working correctly.
(To do this test, adjust your tension setting to normal or medium or 5 or
something in the middle. Raise the presser foot and pull the thread through the
tension. It should pull easily!! Lower the presser foot and pull the thread. It
should pull noticeably harder.) If it passes this test, continue up through the
take up lever,then down through the thread guides to the needle. Make sure your
needle is fully inserted and turned the correct way. set your tension to 5 and try it.
sewman7
SOURCE: Pfaff Creative 7570
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Tension assembly test. To do this test. Pull the threadthrough the tension assembly and test it to make sure the tension is workingcorrectly.
(To do this test, adjust your tension setting to normal or medium or 5 orsomething in the middle. Raise the presser foot and pull the thread through thetension. It should pull easily!! Lower the presser foot and pull the thread. Itshould pull noticeably harder.)
If it doesn’t work this way then you probably have a pieceof thread or lint stuck inside the tension discs. To remove it, turn thetension to 0 zero and raise the presser foot.Using a small screwdriver, openthe space between the discs and spray with canned or compressed air( a needle will work also). The stuffshould come out. Do the tension test again to make sure you got everything andthen try sewing again.
sewman7
SOURCE: thread shreds with Pfaff
I have the book on that machine as well and I have had that problem. Here is what had happened to me: I was soooooo tired of that shreading thing that I took a flashlight and aimed it up the nose of the machine by the lightbulb and fould there to be a nice little rats nest wrapped around the take-up lever and the needle bar. I spent the next three hours getting to that nest with the skinniest and longest tools I could find. Oh it is was fun!
SOURCE: Bottom (bobbin thread) makes loops
I don't have the same brand as yours, but on my machine there is a little screw on the bobbin case that you tighten to increase the bobbin tension. If you've got one, turn it 1/8 to 1/4 turn at a time.
SOURCE: Thread bunching up on bottom of fabric
with all the stuff you say I think that you should try what I do clean it with canned air. Then change the needle you may have a burred or bent needle. and when you clean the machine make sure to use a qtip with oil on it and swab the bobbin holder it may have broken needle piece stuck in it. if after that is done it still not working then adjust the tension taking care to note the positions first.make sure you change only one at a time and put it aback if it doesn't fix the problem and try another position. you may need to try the specialneedle for the fabric (stretchy or jean type)
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