Question about Dual Sew 3400 Mechanical Sewing Machine

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Singer Quantum XL 3400

I have a singer Quantum XL 3400. Every so often when I first start to sew, after 2-3 stitches there will be a loud clang and the needle will jump to the right and there will be a clob of thread underneath the material. Right now I am sewing small squares together to make a quilt square. This will occur every 6-8 starts. It only occurs during a start and never occurs if I am sewing a long seam. The tension seems correct as the top and bottom stitching lay flat and snug to the material. I have checked the threading of the machine and the bobbin and they are correct. I took the plate off and the bobbin holder out and cleaned the area. What could be causing this? What else can I do?

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6 Suggested Answers

  • 323 Answers

SOURCE: i have an 1130 bernina

The 1130 does not have a consumer adjustable presser foot. Check to be sure you are using the correct presser foot .Some feet are slightly different in height which is how the pressure is regulated. If this is not your problem it will need to be seen by a technician.
sewman7

Posted on Jul 14, 2008

  • 323 Answers

SOURCE: unable to adjust tension,

Sounds like the bobbin thread is not inside the tension on the bobbin case. This normally happens when the bobbin is upside down. Insert the bobbin and pull on the thread.The bobbin should turn counter clockwise.
sewman7

Posted on Jul 18, 2008

  • 201 Answers

SOURCE: Skipped stitches & looping on the bottom of Quilt

Try a different needle. Use a quilting or topstitch or even a metallic needle - one that has a larger scarf than normal. The scarf is the groove at the back of the needle where the thread goes while the stitch is being formed. Quilting threads often need more "room" there. I have been told that the Inspira quilting needles are good because they have a thread groove on the front and the back of the needle. Not tried them personally but might be worthwhile for you to consider.

For the looping, you could fiddle with your tensions a little either loosening the bobbin tension or tightening the top, or both. Only ever do this in very small increments. But the good news is that even the "professional" quilters do not have perfect quilt backs - just have a look at them at quilt shows!
Pam M.

Posted on May 03, 2009

  • 240 Answers

SOURCE: stitch problems

You can adjust the pressure foot(not footpedal)which puts the prsure on the foot by the needle. Also try altering the stitch length. If the stitches are skipping on silky fabric or knitted fabrics try using tissue and sewing onto that directly then tearing it off afterwards.

Posted on Jun 11, 2009

  • 152 Answers

SOURCE: Tension and missed stitches

It sounds like one of your clearances in the machine is off. When a machine skips stitches like yours is doing, it does so because the hook responsible for "catching" the thread from the needle is not close enough to the needle so it misses the loop of thread from the needle. If your machine was having a timing problem it wouldn't sew well on any fabric. A clearance problem shows up on certain fabrics at certain times. A few things you could do to try to compensate it would be to use a slightly larger needle and turn your top tension dial down to a lower setting. Move the machine a little slower on the frame or increase the speed of the machine. Either way a trip to your technician will be needed. Make sure you tell him to check the needle to hook clearance.

Posted on Oct 08, 2009

  • 1788 Answers

SOURCE: Uneven stitches while machine quilting.

Are you using the right size needle and thread? Also, check tension recommended by your manual. Let me know if that helps, because I can ask my sister who has that machine

Posted on Jul 26, 2010

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