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Model 385-15343600 Serial 71073690 The stitches are very, very small all the time regardless which of the tension used (bobbin and needle).

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The stitch length dial needs to be set to a lower number (number of stitches per inch) to give you longer stitches. The tensions do not regulate the stitch length, the feed dogs regulate the distance the material is advanced between stitches. Also, make sure the pressure foot is applying enough pressure to keep the material in firm enough contact with the feed dogs.
<Ray>

Posted on Nov 12, 2010

  • canucanu Nov 13, 2010

    above should read "presser foot"
    ~~

  • zayas_ortiz Nov 13, 2010

    Thank you for your response, very useful.

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Bernina 780 sews great, but thread in bobbin keeps messing up while doing embroidery,


Usually, if the thread is messing up under the fabric, it is a top thread issue. This is sometimes referred to as thread nesting or bird nesting.

Make sure you are using a brand new needle of the type specifically for embroidery. The eye needs to be large enough to easily accommodate the thread size and it needs to be a sharp needle. It may help to use a needle with a larger scarf that will protect the upper thread when piercing the fabric. If the thread is not protected sometimes it will hang up on the underside of the fabric when the needle withdraws from the fabric, causing thread loops, etc.

Remove the thread from the machine. ALWAYS RAISE the presser foot and rethread from the beginning. (This releases the tension disk so the thread seats completely.) Verify the thread path is correct.

Use a bobbin thread that is compatible with the embroidery thread. Check that the bobbin thread is smoothly wound on the bobbin, that the bobbin is turning the correct direction in the bobbin case, and the bobbin case tension is threaded properly.

Retest your embroidery on a small project. If you are still seeing thread bunching up under the fabric, you need to tighten the upper tension.

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Nov 02, 2016 | Bernina Sewing Machines

1 Answer

Machine. Skips stitches and the thread breaks in the top tension.


First, install a brand new needle. Confirm that you are using the correct needle for the thread and fabric being stitched, ie the needle eye could be too small for the thread, the fabric is coarse or sticky causing the thread to wear/fray causing breakage, the needle is blunt or bent, a ball point needle is being used on woven fabric or vice versa...
All About Needles

Second, remove the thread from the machine. Always RAISE the presser foot and rethread from the beginning--make sure the correct thread pathway is followed (consult the manual).

Verify that the tension is not set too tight. The tension is correct when both upper and bobbin threads meet in the middle of the fabric without any puckering of the fabric.

Use good quality thread--avoid old or bargain bin variety. And, use the same thread for the upper and bobbin. Some thread brands may work better than others in your machine. You may need to experiment to find ones that work best.

What to Do If Your Sewing Machine Is Skipping Stitches

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10 reasons for skipped stitches

There is also the possibility that there is a nick or burr somewhere that is catching the thread. You can wrap your index finger with old hosiery (or similar fine fabric) and rub around the thread path, in the bobbin/hook area, needle plate, etc. A small burr can be smoothed with a fine emery board. A big burr may require replacement of the part or service by a technician.


...

Apr 23, 2016 | Sewing Machines

2 Answers

Skipping stitches


check tensions especially on the needle thread
check the needle to hook timing
check that the needle in fitted correctly ( slight groove to the thread and the small cut away to the bobbin hook
have it service by the approved sewing machine agent

Sep 02, 2015 | Sewing Machines

2 Answers

I have juki 1541industrial machine . It started sewing upside down . Instead of nice stiching on top show side it on bottom. Any ideas


This is caused by the tension between the bobbin and needle threads being out of balance. If the knots between the stitches are on the bottom side, then you need to tighten your needle thread tension a little at a time until the knot is in middle of fabric. The reverse of this is if the knots are on the top, then either your bobbin tension is too loose or your needle thread tension is too tight. If this occurs, then loosen your needle thread a little at a time to see if knot goes down in middle of fabric. If it does not, then you need to increase the tension on your bobbin thread. This done by taking bobbin case out and tighten the small screw located in the middle of the spring on the side of the case. You only need a slight, steady pull on the bobbin thread - the more you put on the bobbin, the more you are going to have to put on the needle thread.

Feb 13, 2015 | Juki Sewing Machines

1 Answer

Bobbin thread shows


have you tried to tighten the bobbin tension spring??

Dec 23, 2012 | Brother PE770 Computerized Sewing Machine

1 Answer

CANT GET TENSION SET AND ITS SO FAR OFF DONT KNOW WHERE TO START....vogue stitch old..model.label on back says model 1300/1500 or mercury model 704


try www.sewusa.com repairs page for troubleshooting help. start by cleaning and oiling machine. then wind a new bobbin and put in a new needle. load bobbin into bobbin case and ensure thread goes into tension spring. now dangle bobbin case by holding thread tail, bobbin should hang in the air but release thread if you pull it. adjust the tension screw on case 1/4turns only and test again until you get it tight enough to 'dangle'. now load bobbin into rotary hook of machine and thread top. now test sew and adjust top tension in small increments if neede to balance the stitch. but if top tension is wirking okay then 4-6 range should be fine.

Aug 24, 2011 | Sewing Machines

1 Answer

Hi, my problem is my bobbin. The tension is fine, it is when I put the bobbin into the bobbin holder. When I thread it through the plate with the top thread, it is so hard to pull out. It seems really...


TENSION: As you change projects and start sewing on different weight materials, you should test stitch on a piece of scrap material of the same weight before beginning the actual project so you can adjust your upper tension to that particular fabric. As an example, if you're changing from a denim type fabric to a silky fabric, you would definitely want to make sure the tension is correct and the stitching looks right before you start to sew the garment.

To determine whether the upper tension is too tight or too loose for the fabric you're wanting to use, try the following test. Take a small scrap of the fabric, fold it, and stitch a line ON THE BIAS of the fabric, using different colors of thread in the bobbin and on top. Grasp the bias line of stitching between the thumb and the index finger. Space the hands about 3 inches apart and pull with an even, quick force until one thread breaks. If the broken thread is the color of the thread in the needle, it means that the upper tension is too tight. If the broken thread is the color of the bobbin thread, the upper tension is too loose. If both threads break together and take more force to break, it means that the tensions are balanced.

BOBBIN: The most probable cause of the lower thread breaking is an improperly wound bobbin. Regardless of where you wind the bobbin, inside the machine, on the top of the handwheel or on the front side near the hand wheel, the basic "bobbin" rules apply.

** Always start with an empty bobbin. Never wind one color over another color.
** Don't wind the bobbin so full that it would be tight and hard to insert into the bobbin case. Most machines have an automatic "shut off" when the bobbin gets full, but if yours does not, be careful not to fill it too full.
** Wind the bobbin evenly across and in level layers.
** Never mix different sizes of thread in the bobbin and on the spool, unless you're doing sewing machine embroidery or some specialty type of sewing. Using different weights of thread on the spool and in the bobbin for general sewing will cause ragged stitches as well as other stitching problems.

NEEDLE: Probably 25% of machine repair jobs I go out on, the only problem was that the needle was put in backwards. I know you're probably saying "I've been sewing most of my life and I know how to put the needle in the machine"; however many times a seamstress will get in a hurry and not give the needle a second thought when putting a new one in the machine. If your machine will not pick up the bottom thread or skips stitches badly, in most cases it's because the needle is in wrong.

Each sewing machine requires that the "flat" side of the needle be put in a specific way - facing the front, the back, etc., depending on your particular make and model. If you have a sewing machine that takes a needle that doesn't have a flat side, you'll notice that each needle has a groove in it where the thread lays as it penetrates the fabric. Depending on whether your machine shuttle system faces to the front or to the left, the groove of the needle will also face front or left.

MACHINE THREADING: An additional area to check for stitching problems is whether the sewing machine is threaded properly. Each machine has a certain sequence for threading, and it only takes one missed step in the sequence to cause your machine to skip stitches. If you're in doubt, take the top thread completely out and start all over again.

Jul 05, 2009 | Sewing Machines

3 Answers

Sears Kenmore sewing machine model number 15358 tension issues


#14 needle is way big for cotton napkin scrap. a #10 is good for most lightweight fabric. #14 is for sewing denim or levis, like that.

the tension problems on almost all machines regardless of price usually fall on the upper tension. the lower bobbin tension is factory set and it's rare you should ever need to mess with it.

if you have a drop in bobbin (top loading), tighten the adjustment screw all the way and then back it off 1/4 turn. if your machine uses a shuttle bobbin, tighten the adjustment screw all the way and then back it off in 1/4-turn increments until you can hold it in the air like a yo-yo and cause to bobbin case to fall slightly dipping your hand.

A dull needle and stitch length will also mess up your stitch. The idea is to narrow the problem down to one thing and one thing only -- UPPER THREAD TENSION.

So, if you have the right size needle for the job, with the right thread, and if your stitch length selection is correct (usually between 2 and 3 or 8-to-10 stitches per inch, the problem should be with your upper thread tension.

An easy way to fix this then is to remember: Loops on top, upper tension drop. Loops below, upper tension grow. If you get loops on top of your work, lower (drop) your upper thread tension to a lower number. If you get loops on the bottom, raise the upper thread tension.

Different stitches on the same machine will require different upper thread tension settings. Don't be afraid of it. Just remember the pneumonic: loops on top, tension drop, loops below, tension grow -- referring to upper thread tension.

have fun :)

Apr 15, 2009 | Sewing Machines

1 Answer

Skipping stiches


1) It’s possible the machine is threaded incorrectly. Remove the thread completely and rethread the machine. Be sure to use good quality thread--don't buy the cheapest you can find. A good thread will help your machine perform better and your projects last longer.

2) Poor stitch quality can be caused by the needle. Make sure you're using a new needle that's right for the job. Many times machines are taken in for repairs and all they need is a new needle. If you can't remember the last time you changed the needle--it's past time. Needles should be changed at least every eight hours of sewing.

3) When inserting a new needle, make sure the flat side of the needle faces away from the bobbin area. For example, if your machine has a frontloading bobbin, the flat side of the needle faces the back of the machine. If your machine has a side-loading bobbin, the flat side faces the right side of the machine. Some older sergers require special needles that don't have a flat side. Refer to your owner's manual to properly install a serger needle.


4) Thread that shreds or breaks can be blamed on the needle. Use a good thread and make sure the needle eye is large enough for the thread type. Also use the right type of needle for the fabric;
5) The machine tension adjustments put stress on the thread so it doesn't simply flow through the machine. When the upper and lower tensions are balanced, the stitch forms correctly. Tension is easy to adjust--stitch on fabric samples with a different thread colour for the upper and lower threads. Observe the stitch, adjusting the tension until the stitch is formed correctly. As a general rule, adjust the upper tension first. If the stitch still isn't right, adjust the bobbin tension.

Feb 26, 2008 | Singer 2662

2 Answers

Bobbin tension


If the looping is happening on the underside, it is your top tension that is to blame, conversely looping on top is bobbin tension.........take a look HERE for detail on cleaning lint buildup.

Top tension should be set around the middle of the range, usually 4 - 6.

I would not advise playing with bobbin tensions, however, you can take the needle plate off to clean the hook race area (where bobbin case sits) ...this is 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 appears to be fine dirty deposits, a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit will do the trick.

Bargainbox

Jan 26, 2008 | Kenmore Drop-In Bobbin 16231 Mechanical...

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