Question about Bernina 1008
"Nesting or Rat's Nesting" on the bottom side of Bernina sewing machines (CB hook type) is generally the result of very loose top tension. If the problem is found in newer sewing machines such as machines made after 1986 (serial numbers beginning with 26xx xxxx), may have an older Bernina bobbin case in the machine. The problem with the older bobbin cases is that the rounded projection of the latch on the left side of the casing will catch thread, preventing easy thread escapement during the take-up lever cycling resulting in loops on the bottom side and or thread breakage, etc..
Note:....Timings and modified latch geometry's were applied to later models to allow for good thread escapement. Older Bernina cases cannot be used on newer machines but newer cases can be used on all CB hook Bernina machines.
Additionally, Chinese copies of the Bernina/Cerliani OEM bobbin are rampant and can cause sewing issues. Always ask for OEM Bernina cases.
Note the following trouble shooting logic:
1. The center tension disk that is visible through the thread slot in the top cover of most machines must be positioned exactly in the middle of the top cover slot. By loosening the fixing screws on the top tension mechanism, one can adjust the disk position to center.
2. It would be a very rare situation for the top tension to change whatsoever from the (red center marking) factory setting. The most likely cause of loose top tension under the normal center mark position, would be accumulated lint, thread, or a sticky substance between the disks. This would prevent the tension compression disks from applying an even tension on the sewing yarn (thread). Often this can be blown out with compressed air when the presser foot lever is lifted in the up position. In some cases, soft drinks and other sticky or corrosive liquids can find their way between the disks. In this case, the tension assembly must be removed, disassembled, and the disks cleaned and polished.
3. Check the facial surfaces of the bobbin case for corrosion, and sticky substances that prevents the thread from easily sliding over the bobbin case.
4. Check that the spindle of the hook body is not bent or warped, causing the bobbin case to wobble, thus creating an intermittent pressure on the hook race cover at the moment that the thread is trying to escape over the bobbin case finger. (Replace the hook body)
5. Inspect the undercut on the hook body spindle for thread wrappings and knots. This condition can cause the bobbin case to press hard against the hook race cover, hence hindered thread escapement .
6. Exceedingly tight bottom tension can cause some problems as well. ( If you don't know how to adjust Bernina bobbin cases to factory settings, please ask).
7. Hook timing, (loop lift) can be out enough to affect thread escapement. This is typical of newer machines made after 1986 since Bernina no longer made fixed timed machines like the earlier Swiss made models. The later made models have timing components that can slip under stressed machine mechanics.
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Posted on May 12, 2014
The tension can be perfect after your first stitch. But, if you find that the first stitch you take grabs the top thread and yanks it down into the bobbin area and creates a huge thread nest, you can avoid it. Pull the bobbin thread up through your fabric and then wrap both thread ends around your finger and gently hold them while you take your first stitch. This will frequently prevent thread nesting under the fabric and is taught by Bernina instructors. Thread nesting occurs on a lot of sewing machines, not just Bernina and is not limited to only older mechanical machines but also occurs with the new computerized models as well.
This is a recommended remedy for quilting, although you can use it for regular sewing as well.
Following is a video showing how to do it:
Posted on Feb 24, 2015
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Posted on Jan 02, 2017
I hope I can explain this in an understandable way!
1. Pull the end of the thread from the spool to the left and "click" it into the little metal guide (on the top of the machine) that is at the back of the long **** in the top. It's easiest to do this by holding the thread tight between your two hands, placing it behind the guide, and pulling forward until it clicks in.
2. for the remaining steps, let the thrread slide between the fingers of your right hand, keeping a little tension on it, as you thread the machine with your left hand.
3. Bring the thread end forward, laying the thread into the ****, and continue downward, along the right side of the vertical silver bar/hook thingy.
4. Bring the thread under that bar from right to left, and go back up towards the top of the wide **** in the front of the machine. As you pull up, the thread will click into the lower bar/hook thingy.
5. Lay the thread along the right side of the wide ****, go over the top of the needle bar (the part that goes up and down in the ****) and bring it down the left side. It will click into the needle bar.
6. Bring the thread back down towards the presser foot. Right in front of the screw that holds the foot on, there is a hook that opens on the left side. Slide the thread behind this hook, and then thread the needle from front to back.
7. Hold onto the end of the thread and run the needle down and back up once. Pull on the thread, and it will pull up a loop of the bobbin thread. Stick the tip of your scissors or seam ripper into the loop and pull the end of the bobbin thread out.
8. Slide your top thread through the slot in the presser foot so it comes out from underneath the foot, and you're ready to go! (Be sure and hold onto both threads for the first few stitches when you start a seam, to keep if from jamming up inside.)
Let me know if you need any clarification.
Posted on Jun 21, 2009
SOURCE: bernina 1008 - tension problems
Make sure the presser foot bar is UP before you thread the machine, otherwise the thread doesn't connect propertly with the tension discs. Top thread should reel-off in clockwise direction.
Posted on Jan 24, 2009
Double check that your needle is the proper one for your machine, and that it is in properly. It sounds like it is not picking up the thread properly. Tension problems usually have more to do with threading, thread or needle problems than with bobbin problems. Also check your bobbin is unwinding in the proper direction for your machine. Most machines unwind the bobbin thread, turning clockwise. Set your screw back to the factory settings, and give the machine a good cleaning as well. Lint can cause this to happen as well, if it builds up enough to interfere with the needle and the hook action. Double check that your upper thread is threaded properly as well. I suspect your needle is in backwards however.
Posted on Jun 12, 2009
when sewing thick fabrics and when using thick threads you will usually need to tighten top tension - on most machines to maximum in order for the machine to pull the thread up into the fabric. you must also use a needle which will slide along the thread when thread is through eye of needle (take needle out of machine, put thread through eye and see if needle will pass freely along thread - if not, use a larger needle)
Posted on Jul 24, 2009
Hi, I'm guessing you have the bobbin in the bobbincase upside down and its turning the wrong way. Or the machine is not thread correctly. Possibly there is junk in between the tension discs at the top that the thread goes between. Just some thoughts.
Posted on Oct 08, 2009
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