Pfaff 4.0 quilt expression pulling bobbin thread up to top of fabric help.

SOURCE: bobbin jams

This is a common problem with all sewing machines. You must make sure that both needle and bobbin thread are behind the sewing foot and that there is at least 4inches of each thread before you begin stitching. Thread jams can also be caused by improper placement of bobbin in the casing. Place the bobbin in the case so the open side is facing you, the thread end should be on your right, then slide the thread into the opening leaving about 6 inches to pull through. It may look like it should be the other way, but there needs to be some tension. If these solutions do not help, you probably need to have your machine cleaned and adjusted.

Sylvie Bernard

• 3 Answers
• Posted on Feb 23, 2009

SOURCE: Pfaff 7570 Tension Problem

Thank you for your help. Actually I was having so much problem that I took the machine to a technician, which diagnosed a few problems. One of them was a big chunk of threads caught in the tension dials. He also told me that I was using a thread that was too heavy which is an all cotton 3 ply, thicker actually then buttonhole thread. So, I've changed threads to an all pupose type Gutterman. The stippling isn't as nice, since much thinner but it solve the problem. If anyone could tell me exactly what type of thread they use and how to adjust the tension, I would very much appreciate it. You can also be sure that I will run a pipe cleaner down the tension dials once in a whileto make sure it's all clear.
Thanks again!

Kelley Buchanan

• 130 Answers
• Posted on Apr 25, 2009

SOURCE: Tension Problem on Pfaff 2034, bobbin loops

Rule of thumb.. Loops on the bottom, problem on the top. Loops on the top, problems on the bottom.

Set your upper tension at 4, and rethread the machine from the top. Just before you thread the needle, but the presser foot down. If the thread pulls right thru easily, then the thread is not thru the tension wheel right. Because, if you can't pull the thread thru with the presser foot down, you have it threaded right.

SOURCE: pfaff varimatic 6091 sew a rag quilt with jean and

Hi! The bobbin tension rarely needs to be adjusted. First, make sure you're using the appropriate size needle and thread for your fabric (I'd probably use either a 'denim' needle or a universal size 14) and also that the upper thread and bobbin are threaded absolutely correctly. These can throw off the tension! Also, take the time to clean out the bobbin area. That can throw your stitch off also.

If the stitch on the bottom is loose, so that you see the top threads, then the top tension is too loose. If the top stitch is too loose and you see the bobbin threads on top, then the top tension is too tight.

It helps to thread the machine with different color thread on top and in the bobbin, and then stitch an inch or so on the same type of fabric as you're using in your quilt. Check the stitch. If you need to adjust the top tension, make sure the pressure foot is down! Adjust a little, stitch a few inches, and check again. Repeat until you don't see any (or very little) bobbin thread on the top or top thread on the bottom.

If you go through all these steps, and the bobbin thread is still loose (and you've tightened up the top tension), then there is a tiny little screw on the side of the bobbin case that you can use to adjust the bobbin tension. Turn the screw just a little bit (less than a quarter turn), stitch, check, etc. Once the bobbin tension is set, you shouldn't ever have to change it.

Let me know if this helps, ok?

Happy sewing!

SOURCE: Needle thread looping underneath, threads not interlocking at all

If the machine is now threaded, lift the presser foot.

Now, pull about 10" of thread through the needle.

The next time you thread the machine, lift the presser foot first.

When the presser foot is up, the tension control opens and allows the thread to "seat" into the control, then when the foot is down the control closes to the indicated setting.

When threading the machine with the foot is down, thread does not enter the tension control and when you start to sew, there is no tension on the thread.

No tension = loosey, goosey, loopy stitches underneath.

Because the lack of tension on the top thread, the bobbin thread cannot lock a proper stitch.