Question about Bernina 1008

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I have a Bernina 1008 and I love it, but every time I try to sew with it lately, the bottom thread wads up and makes a terrible mess. It will sew OK for a little bit and then the bobbin thread sort of stops and breaks off and when I look at the bottom thread it's all bunched up.

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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.
Rick

Posted on Oct 08, 2009

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Bernina 1008 thread bunching on bottom


"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.
SewTechnical Home ">

Feb 13, 2014 | Bernina 1008

1 Answer

I have a Bernina 1008. The thread is bunching up underneath when sewing. I've cleaned and oiled the bobbin area, rethreaded and adujusted the upper tensnion- the topstitch looks fine, it's lumpy on the...


Hello. Make sure the bobbin is not backward. It seems the upper tension is still not adjusted right. If the bobbin pulls smooth focus on the top tension. Good Luck

Feb 13, 2014 | Bernina 1008

2 Answers

I have a Bernina 800 Serger and I am trying to thread it.


You might take a look on ebay item 150416413591

Sep 07, 2009 | Bernina 1008

1 Answer

Bernina 1008 sewing machine making huge clumps of loops on underside of fabric. have tried moving screw on bobbin in two opposite directions without a sign of improvement.


Hi: You have threaded the machine incorrectly. Rethread the machine with the presser foot up to the needle, pull the thread (loose) and drop the presser foot while pulling thread, thread should get tighter, then thread needle and machine will work fine. Make sure the top tension is set at where you normally have it, probably about #4 or #5

Jan 08, 2009 | Bernina 1008

1 Answer

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.

Jan 02, 2009 | Bernina 1008

1 Answer

Tension


I'm assuming the thread is looping on the bottom. If this is not the case, ignore the rest of this.
Perform a tension test. Tension assembly test. To do this test. 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 doesn’t work this way then you probably have a piece of thread or lint stuck inside the tension discs. To remove it, turn the tension to 0 zero and raise the presser foot.Using a small screwdriver, open the space between the discs and spray with canned or compressed air. The stuff should come out. Do the tension test again to make sure you got everything and then try sewing again.
sewman7

Aug 02, 2008 | Bernina 1008

2 Answers

Parts


Contact a Bernina dealer as Bernina Switzerland produce a series of charts for schools showing machines and overlockers. With full threading and machine descriptions.

Jun 19, 2008 | Bernina 1008

2 Answers

Thread tension problem when sewing on heavy fabrics


Sometimes when I need to use heavy thread for top stitching to reinforce a seam that has come undone, I will use the heavy thread on the top and regular thread on the bottom. I haven't tried it the other way around for hemming but I would think it would work. I do not currently have a Bernina.

Jan 15, 2008 | Bernina Artista 180

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