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Problem bernette 92c tension

When sewing a straight stitch, the stitches look fine on top of seam, but uneven and "wobbly" on bottom of seam. The thread tension is set on 4 and the needle is new, so I don't understand the problem.

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Posted on Jan 02, 2017

dupina
  • 110 Answers

SOURCE: tension

Check your tension disks, with your presser foot up, and the tension dial on zero. Sometimes a piece of cotton breaks off between the tension disks and then prevents the disks to work properly. Also make sure when you thread the machine, the thread does go through the disks and over the take up lever. After you threaded the machine, before putting the thread through the eye of the needle, lower the presser foot and while pulling on the thread with your left hand, increase the tension with your right hand. Do it slowly and you should feel in difference in tension. If this is the case, your machine should work fine.

Posted on Nov 30, 2007

  • 1 Answer

SOURCE: how do I adjust the bottom thread tension?

some machines have a nob on the front loose is low numbers like 0 1 -2 most machines work well on number 3. If the nob is not on the front check and see if it is on the side.

Posted on Feb 12, 2008

  • 15 Answers

SOURCE: I have a white superlock 228 jaguar serger problems with right needle

Couple of things I could think of: tension disks need cleaning, there is a site that tells how to clean them, maybe 2 as I recall. Other thing is it is a much older serger, (I have one I am slowly working on to bring up to working level), so it could be that a tension spring internally has lost its tension. It might need a trip to the repair man if that is the case. Another thing is are you using correct needles for the machine? Have you changed them recently? Even new needles can be bad, so if you have to change three times to triple check it can be worth it.

Posted on Sep 09, 2008

  • 4 Answers

SOURCE: Stitch is uneven, not straight, and tension off on top and bottom

on my industrial machine this was caused by the wrong size needle. the length was off just a fraction. just an idea, in case you bought generic needles or something.

Posted on Nov 30, 2008

e-Guru
  • 3917 Answers

SOURCE: I have a Sapphire 835,and

Hi

Loops on the bottom of the fabric = inadequate top tension
Loops on top of the fabric = inadequate bottom tension. this is probably a tension problem. there is a discrepancy between top and bobbin thread tension. The looping is a too loose tension in the bobbin or too tight a tension on the top thread. in either case, and regardless of cause, the two are out of synch. Try adjusting bobbin tension according to your machine type. after adjusting the bobbin tension sew on a piece of scrap. use a medium sized stitch. check and adjust and test until you are satisfied. If the looping isn't severe, adjust top string tension slightly looser.

Here are other causes for this problem, but they are more unusual and should be considered only if the common remedies don't answer.

If it's the bottom thread, the bobbin isn't wound or loaded correctly, or it's the wrong bobbin. Check to see the bobbin fits in the bobbin case properly. Don't mess with the bobbin tension unless you have to. If the machine had been working before and is not now, the problem is most likely not in the bobbin tension. The adjustment range is really tiny, and it's easy to mess it up.If it still loops after you redo the bobbin, you might also check the parts around the bobbin. Clean up all the fuzz that had collected around the bobbin. Remove all fragments of thread and fuzz with brush and vacuum (don't use compressed air or canned air or blow -- it pushes fuzz farther into the machine where you can't get to it.) Pay special attention to the area around the feed dogs and the sewing hook area.
Lubricate the machine according to the manual's instructions if the manual describes using oil.

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Posted on Sep 04, 2011

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2 Answers

How to adjust the bobbin tension.


According to the manual, you should not need to adjust the bobbin tension (and I located other sites which stated the bobbin tension cannot be adjusted on this machine). Apparently, all the tension adjustment is accomplished through the upper thread::
"EN Thread Tension Upper thread tension Basic thread tension setting: "4". (1) To increase the tension, turn the dial to the next number up. To reduce the tension, turn the dial to the next number down. A. Normal thread tension for straight stitch sewing. B. Thread tension too loose for straight stitch sewing. Turn dial to higher number. C. Thread tension too tight for straight stitch sewing. Turn dial to lower number. D. Normal thread tension for zig zag and decorative sewing. Correct thread tension is when a small amount of the upper thread appears on the bottom side of fabric. Lower thread tension The bobbin tension has been set correctly at the factory, so you do not need to adjust it. Please note: - Proper tension setting is important for strong seams. - There is no single tension setting appropriate for all stitch functions, thread or fabric. - A balanced tension (identical stitches both top and bottom) is usually only desirable for straight stitch construction sewing. - 90% of all sewing will be between "3" and "5". - For zig zag and decorative sewing stitch functions, thread tension should generally be less than for straight stitch sewing. - For all decorative sewing you will always obtain a nicer stitch and less fabric puckering when the upper thread appears on the bottom side of your fabric. 1 A B C 22 D"

Doing further research, I found this statement on a machine review site:
"After reading reviews online from where I've bought my drop-in bobbin machines, I think many of the negative reviews are due to the bobbin thread coming up without laying across the bobbin. It can cause the stitches to look very sloppy and no amount of tension adjusting can fix the stitches."

There are several machine review sites wherein 4423 owners stated their disappointment in the 4423's performance. Some said the machine failed almost immediately and others said the machines developed problems when sewing heavy fabric.

Apr 26, 2015 | Singer 4423 Sewing Machine

2 Answers

My Bernina Bernette 65 has a problem with the thread bunching up every 10-15 stiches on the bottom. Some of the thread stitches on the bottom of the fabric are in a straight line, and then the thread will...


try a new needle--one that is for the fabric being sewed
then try to adjust the top thread tension again, if the stitches remain loose and the tension won't adjust then the tension knob needs to be checked to see if there is something wrong with it.
also check to make sure the bobbin is inserted correctly into the bobbin case, if the bobbin is not turned the right way in the bobbin case the sewing machine will not stitch correctly.

Aug 05, 2013 | Bernina BERNETTE 65 Mechanical Sewing...

2 Answers

The bottom stitching looks like a line and not stitches the top stitching is fine


whether its bias or straight does not matter to machine. loosen the bobbin tension and put more tension on take up spring by inserting a screwdriver in the slot of the top thread tensioner. turn to right.

Dec 13, 2012 | Juki DDL8300N Sewing Machine

1 Answer

Uneven stitching on the bottom


Try sewvacdoctor.com and refer to handy problem list. Click on it for answer. Hope this helps.

Apr 03, 2012 | Singer 1120 Mechanical Sewing Machine

1 Answer

How do I create a rolled hem with this machine. I see the stitch width knob, but do I need to remove one of the threads for this?


Making a rolled hem on any overlocker is achieved in the following way:

use right hand needle only and top and bottom loopers. Turn stitch length down so threads are closed up (on mine this is 0.5). Your stitch length dial will be one on the right hand side near the flywheel usually. Loosen off the the top looper tension and tighten up the bottom looper tension (these are the right and 2nd right tension dials on front of the machine). On my Bernette I leave the needle at the usual 5, 2 on the top looper and 6.5 to 7 on the bottom looper thread. Move cutting blade position to the right so that you are trimming the fabric quite a bit wider than your stitch, this makes the fabric "roll" underneath inside the stitching to form the rolled edge or hem.

There is also another step that needs to happen where you change or remove a little stitch finger that sits in the pressure foot or just under it. On the Bernettes, you flick a lever to move this stitch finger back towards the operator so it is out of the stitch forming area. On some machines, it is a case of changing the little stitch finger which is screwed onto the pressure foot with a screwdriver.

I really don't know with your Necchi which it is but have a good look at the pressure foot, and around the blade cutting area and see if you can see a lever or check out the accessory bag and see if there is another stitch finger in there, it would be smaller than the one on the foot now. In effect, this finger sits out and the threads wrap around it to form your normal overlock but for rolled hem you want a much smaller finger in place to make a very little seam.

The other variable which makes a very neat job is to use a thread called "wooly Overlock" in the upper looper only. This thread when pulled under tension is tight looking but when you let it go, it fluffs out. So when seaming on a rolled hem it fills out the stitching and covers the edge of the fabric fully giving a smooth look. You can do it without but wooly thread makes a great job and you'll see it on all Ready to Wear seams usually for this reason.

If I am going to roll hem a fine sheer woven fabric like organza or chiffon I will change the needle to make sure it is nice and sharp and also ensure it is a regular point, not a ball point (I seam lots of knits so have ball points in most of the time on mine) Usually a size 80 is fine.

I hope this gets you going with your overlocker, I usually test stitch quite a bit with the stitch length at the normal 2.5 setting and adjust the looper tensions until I've got the stitch looking good, then turn it down to the very close 0.5, just to not waste a ton of thread.

Sep 09, 2011 | Necchi 6002 Sewing Machine

1 Answer

I have a singer 7258 that I can not get the tension to loosen up on. The top stitch is straight across and adjusting dial doesn't help.


Hello

Adjust the tension

Load your sewing machine with one color on top, threaded through the needle. Load the second color thread into the bobbin and thread.


Fold the scrap fabric in half, and sew a straight stitch at least 2 inches long. Look closely at the seam. If you see loops of the bottom color thread on top of the fabric, proceed to Step 3. If you see loops of the top color thread on the bottom of the fabric, proceed to step 4.


Loosen the top tension. Since the top tension is so tight, it is pulling the bottom thread up through the fabric. Loosen the top tension by turning the numbered knob on the front of the sewing machine counterclockwise by one number.


Tighten the top tension. Since the top tension is too loose, the bottom thread is pulling the top thread down through the fabric. Tighten the top tension by turning the numbered knob on the front of the sewing machine clockwise by one number.


Sew a straight stitch 3 inches in length. Check the stitching. It is perfect if the threads meet in the middle, and you can only see the top thread on top and the bottom thread on bottom. If it still needs adjusting, go back to step 2 to repeat the needed steps.


Using two different colored threads makes it easier for you to see which thread is being pulled.

Always use proper precautions when working with electrical machines.

Aug 01, 2011 | Singer Sewing Machines

1 Answer

How do I change the stitch width on my Bernette serger?


You move the top blade to the right to trim less so stitch forms wider and use left needle. Or both needles for 4thread seam which is more for knits. Blade has a knob usually to adjust it's position. You should test on scraps of your fabric as the weight of the fabric will also determine width of the seam. Adjust top and bottom looper tensions to encase cut edge neatly.

Apr 23, 2011 | Sewing Machines

1 Answer

Can someone tell me which stitch to use on the Bernette 65 to sew elastic? I can't seem to find a stretch stitch. Thanks.


Are you sewing through elastic such as joining the two ends of a loop of elastic in a waistband?

If so, just your straight stitch or three step zig zag works fine.

If you are actually seaming on knit fabrics then you need a stitch with forwards and backwards movement to allow the fabric to give when worn without breaking the thread in the seam. tally_girl_8.jpg If this is your machine and you want to stich jersey or knits, I'd use the overcasting stitch, fifth from the right. or the tricot stitch to the right of it, this stitch is good for attaching rib trim around necks and sleeves.

Your sewing machine manual should also give you information on which stitch is used for what. I also like the Singer Sewing Manual book for good general sewing information.

Mar 09, 2011 | Sewing Machines

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