Question about Bernina Sewing Machines

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Got a problem with the tension on my bernina record 730 can anyone help

High I cannot get a nice stitch on my bernina any answers as it has no numbers on the tension what do I do

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: tension issues

I'm working on 2 different singers. One, Singer 3343C has upper and lower tension problems that turning the dial just doesn't help. How do I adjust the tension on this drop-in bobbin carrier? My other machine is Singer Model 15 (AL311850), I'm having upper tension problems and the machine is sewing loudly-it's never done that before. Help!

Posted on Feb 03, 2008

  • 6 Answers

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

talk2ginny
  • 34 Answers

SOURCE: My Bernina 930's lower tension

Hi - you might have a dirty bobbin case, or need a new one. IAfter awhile, little teeny dust bunnies can collect in your bobbin case and cause your bobbin tension to go wonky, especially if you use cotton thread. If you happen to have an extra bobbin case, try using the new bobbin case to see if that solves the problem. Otherwise.....

  • Remove your bobbin case and take out the bobbin. Find a small, stiff brush like the one that came with your machine and stand in very good light. Brush out the inside of your bobbin case, and push one or two bristles of your brush into any opening you can see. If you see any trace of dust but you can't get it out, use tweezers to gently pull the dust out. Now look at the outside of your bobbin case. In the small opening where you insert your bobbin thread into the bobbin case, there is a small piece of metal with screws in it the lays over the bobbin case. Brush that area carefully, and again, insert one or two bristles under than piece of metal and into any other small opening where the bristles will fit. Try sewing again. If you are still getting loops, take out your bobbin case with the bobbin thread still inserted and grab the bobbin thread with two fingers. Let go of the bobbin case - sort of like you are holding a yo-yo. If the bobbin case starts to drop as soon as you let go, your bobbin tension is loose. If the the case doesn't move, gently snap the bobbin thread you are holding and see how far the bobbin case moves down toward the floor (you might need to try this a couple of times, the bobbin has a nasty habit of flying out). When you do the snap, the bobbin case should move down about two inches and stop. If do not know how to adjust the bobbin tension, either check your manual or take the machine in for service.
  • If you haven't already, it's a good idea to remove the thread plate that sits under the needle and clean that area out with your brush. Also, get a really good flashlight and check the area where you insert your bobbin case. Gently turn your fly wheel and look inside the hook area - remove any dust or bits of thread.
In general, you should oil your machine as indicated in your manual as often as directed. You should change your needle every 10 hours of sewing - or each time you start a new project, and you should take your machine in for service every one or two years - even if you only use it once and awhile.

Hope this helps, Ginny

Posted on Jan 31, 2009

  • 10 Answers

SOURCE: Just got my used Bernina deco 650 from the shop. Tension off

The tensions are not calibrated properly. To get by, or if you do not want to take it back to the shop, just lower the upper tension a little at a time until it looks ok.
I have 25 years experience working on sewing machines

Posted on Jun 30, 2009

bargainbox
  • 1388 Answers

SOURCE: tension on my artista 200 bernina machine

Please TRY the solution BEFORE giving your considered rating.
Specific detail on bobbin case adjustment (with picture) near halfway down reply, the remainder will help you achieve a balance of top and bottom tensions.

Ensure that all is clean and free of lint and jams, this is the most likely cause....now for tension troubleshooting .......

This solution is for tension problems...if you cannot form any sort of stitch, the issue is quite different, so please let me know if you need a different problem solved.....

It is quite long, but just work through each section in order.

The "knotting up" can reveal a lot. If you have loose threads on one side or the other, the tension on the opposite side will be the culprit.

QUICK SUMMARY FIRST:
Ensure sharp new needle,
Thread guides and Bobbin are Clean & Clear of lint
Set Top Tesion to 4 ....then....
Balance Bobbin to suit.

TOP THREAD TENSION:
If the looping threads are on the underside as you sew, it is the top tension. Top tension ought to be between 4 & 6 (this variation to allow for the different weights of fabric in your projects).

IS YOUR NEEDLE SHARP ?
If you are using a needle that has seen quite a deal of work, or you suspect it may be blunt, change it for a new one !

TOP TENSION & GUIDES:
Make sure that when you thread the machine the presser foot is up so the thread goes between the discs and not to one side, top tension between 4 and 6, and that you have threaded through all the guides, including the last one, usually on the needle arm, just above the needle clamp.

It may be there is lint trapped between the discs, this will keep them slightly apart and reduce the actual tension, sometimes dramatically.

If tensions appear correct, and the thread is definitely in the channel between the discs, but still too loose and looping, try raising presser foot and remove your thread.

Now, with a 2" (50mm) wide strip piece of fabric 8 - 10" (20 - 25cm) moistened with methylated or denatured spirit, gently insert the fabric strip and clean between the discs with a see saw / to and fro action.

In the worst cases, gentle use of a needle to pick & remove the jam may be necessary, but be very gentle and make sure the tension is set at Zero and the presser foot is raised, (to disengage tension plates).... do not gouge or score the plates, they need a polished surface to work correctly.

BOBBIN TENSION:
Far less common, but if the loose threads are on the top, it is bobbin tension that is loose, it too may have lint in the spring and be giving a "false" tension.

I would not recommend fiddling with bobbin tension without good reason, it may end up with missing small screws and spring pieces, however, you can take the needle plate off to clean
the hook race area (where bobbin case sits)

...this is just good housekeeping, my wife does this every time she replaces the bobbin....

just take it out and clean the bobbin case and the fixed metal hook race with a small brush to remove lint. If there is a significant amount of lint, use a vacuum and small brush to get the worst.

Then wipe all this area with a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit, especially if there appears to be fine dirty deposits....oil and lint combine to conspire against you.

If it seems likely that you ......really ....do .....actually .....need .....to adjust the bobbin case, first check there is no lint trapped in the metal spring where the thread is tensioned.

TOP LOADER:
Drop-in Bobbin case will look similar to this image with the tension screw in the middle of the metalwork....

4c76dc1.jpg ...the other screw at one end is holding it all together, so beware....it is not a tragedy to undo the whole lot and clean it, but very gingerly and lay the bits out in sequence and orientation, or you risk tearing your hair out !

FRONT LOADER:
....this is a bobbin case from a front loading machine and works in a very similar fashion to the top loader with drop in bobbin, again, if you dismantle it, take care so you can put it all
back properly.
165ca5c.jpg FINISHING UP
GETTING THE BALANCE RIGHT:
When you are certain there's no trapped lint in top tension or bobbin, set the top tension to 4 and the bobbin tension to a point where you just begin to feel resistance.

Try using good quality thread of contrasting colours so you can more easily spot the changes.

Set your zigzag to one width less than maximum (eg. 5 of 6 ...or... 4 of 5 etc) and sew a sample for a few inches and check the result.... adjust the bobbin tension screw very little at
a time, perhaps 1/16 of a turn.

You may find you are playing with this balance for some little while and if you are putting the needleplate on and off each time begin to think it cannot be correct to do this.....BUT....it is,
and eventually, you do get a "feel" for the correct tension and then it happens quite quickly.....as a user you won't be doing it very often unless there is lint built up (or are there small hands at work around the house !?!?!)

OTHER ISSUES:
If you live near the ocean as we do, salt air can play havoc with metalwork inside and out, so to help minimise this, keep a few small packets of dessicant (silica gel) in your machine
case....no case ? then make some sort of cover !

Same applies in any damp or humid environment, keep your machine dry and dust free.

Budget for a proper full service every couple of years (more often if heavily used) and if you don't use your machine for a few years, be aware that old oil will dry out and combining with
dust and form a "clag" like glue (another reason for some sort of cover, even a teatowel !)

FINALLY, A WORD ON THREAD:
If it is worth spending the time, energy and money on making something that you would like to give lasting enjoyment......use quality thread, .......it may seem to cost a little more at the
time, but the results, ease of use and added longevity will be worth the extra, and as a bonus, your tension troubles may be fewer and further between, because there is a more consistent diameter with good thread, and less compensating to be done by your tension plates and less thread breaks

bargainbox.com.au

Posted on Aug 23, 2009

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I have a faithful 730 Bernina and currently the bobbin thread keeps breaking. Please advise what may be causing this. Thanking you.


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here's a free manual
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