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Lower thread very loose

I have had this sewing since 2 years but not been able to use it. I have threaded it right but my lower thread is always very loose & messy while the top is straight. Please help

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  • Sewing Machines Master
  • 1,388 Answers

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....

lower thread very loose - 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 !

www.bargainbox.com.au

Posted on Aug 02, 2009

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When sewing a straight stich The bottom thread is loose.


Your upper and lower thread tensions are out of balance. The upper thread tension is too high or your lower thread tension is too low. Make sure your bobbin thread is correctly routed under the tension spring. There is a small screw on the bobbin case that always you to adjust tension.

Feb 20, 2017 | Sewing Machines

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PRO LINE BABY LOCK SERGER, BOTTOM LOOP TOO LOOSE.


Make sure the lower looper thread is seated properly in the tension disk. (RAISE the presser foot. Grasp the thread between the thread tree and the tension disk and with the other hand, grasp the thread below the tension disk and give a little tug.) When threading, always RAISE the presser foot so the tension disks are released.

If the lower looper thread is still too loose, set it to a tighter setting until it creates the stitch you want.

....

Feb 27, 2016 | Baby Lock Sewing Machines

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Why does my thread knot on the back when stitching in place?


Several things to try:
Pull thread tails (both bobbin thread and upper thread) straight back and when you lower the presser foot, make sure they are held down straight back. This may or may not be enough to solve the problem, but it is simple to try, and often works. You might want to hold the thread tails while you start sewing.
Use a starter--folded piece of fabric scrap about an inch long--and begin sewing oink middle of starter. Push the fabric you want to see right up to the starter and keep sewing from the starter right onto your project without lifting the presser foot or cutting the thread. When you finish sewing, cut the little piece of thread between the starter and your project.
Before lowering presser foot, use wheel to lower your needle once and then pull up bobbin thread to top surface of your project. Then hold both bobbin and upper thread tails, lower your presser foot, and begin sewing. Release the thread tails after a few stitches.
Hope this helps. Those nasty "thread nests" are a real pain.

Jul 13, 2014 | Janome Sewing Machines

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What is solution of lose stitching from bobbin


Hi: Always remember that it is impossible for bobbin thread to loop as it simply spools off bobbin, the problem will always be with the top tension. Make sure you top tension dial is centered (half of the numbers on the dial). Re thread top of machine with presser foot UP, thread to needle, pull thread (should be loose), then lower presser foot and thread should tighten up, if it doesn't that means lint in between the tension discs, threaded wrong or tension to loose. If it tightens up then should sew properly if you haven't changes adjustments on machine. Have repaired over 20,000 machines over the years and 95% of the time the problem always starts with improper threading.

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1 Answer

Stitching is too loose on the Juno Janome Serger Model 3434D


sergers the most frustrating machines. Every time you change fabrics you go through a tension adjusting phase.

First make sure you have threaded the machine in the proper order. upper looper, lower looper, then needles from right to left. Always thread any machine while the presser foot lever is in the UP position.

If you ever break a thread... you MUST pull all threads and rethread using the proper order.

Ok that's out of the way. Pull all your threads and get out several pieces of the same fabric scrap. Thread each pathway with a different color. This will help you determine which thread is giving you fits. Sew a test strip. Which thread is loose? tighten/loosen that tension. Keep doing this until you have a well balance seam. Then clip the colored threads starting with the upper looper thread, tie off to your proper color for your seam pull the thread through and up through the throat plate. proceed in this manner with lower looper, right needle, left needle. Sew a test seam.

Good luck.

Aug 08, 2012 | Janome Sewing Machines

1 Answer

My Necchi 4595 has never really worked properly,.,.,the lower thread (bobbin) is very loose and then the thread breaks,,,I've tried to adjust the tension, but maybe I'm doing that wrong.


I also own 2 necchi sewing machines, my mechanical is a 4595,,
lower thread tension
to test the bobbin tension, remove the bobbin case & bobbin & hold it by suspending it byb the thread, **** it once or twice, if the tension is correct, the thread will unwind by about an inch or two.
if the tension is too tight, it does not unwind at all, if the tension is too loose, it will drop too much.
to adjust the tension,, left is loosen & to the right tighten

thread breaks
rethread the machine making sure to get all thread guides
top thread tension usually 3 or 4
replace needle- make sure the needle is inserted correctly
some needles don't work with some thread, here's a tip

Cut 6-8 inch piece of thread of the spool you are going to use for your project
Take the needle you are going to use for the project
& insert the thread thru the eye of the needle
& lift one end of the thread to a 45 degree angle
& if the needle is the right size for the thread it will slide down the thread
But if the needle hangs on the thread you need one size larger needle for the thread

Nov 16, 2010 | Necchi 4595 Mechanical Sewing Machine

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I am trying to make a rag blanket and the tension on my machine loops on the underside. I am about ready to throw it in the ditch. How do you fix the tension on a 9410 singer machine?


How to fix the tension on 'any' sewing machine. I may know how (family in the sewing business for 50 years-all now retired).

To begin with:
1) Put in a new needle;
2) Re-thread the top thread;
3) Lower the foot;
4) If the needle threads from front to back (or r. side to l. side); begin pulling the thread through the needle in the direction it threads, while slightly tightening the top tension knob, wheel, or other tightener. The tension on the top thread should bend the needle quite a bit, without breaking it (for cotton material sewing). If you're sewing a lighter fabric, the top tension should be slightly looser;
5) Once you have the top tension adjusted, re-thread the bobbin case, with the thread coming to you, out of the bobbin, having the thread escapement on the 'top,' while the bobbin case is in your right hand, and the bobbin is visible on the left side. Your instruction book may say the opposite way, but this is really the correct way to do it, as the new threads have many knots in them, and the bobbin case will stay correctly threaded doing it this way; next,
6) loosen the little screw on the flat spring, that presses against the thread on the thread escapement of the bobbin (if it is currently tight);
7) If the thread is easily pulled through the thread escapement, slightly tighten the tread, so a firm pull is needed to bring the thread out of the bobbin case. Not to tight though (or you will get loops on the bottom of your seam. You may have to tighten a little, or loosen a little. The 'knot' of each stitch should be in the middle of the cloth. If the bottom tension is too tight, the knot will be on the bottom; if it's too loose, it will be on the top. When it's just right, it will be in the middle;
8) When you change weights and types of fabrics, you may have to re-adjust your tensions; but, the process is the same.

Just remember: Always begin with a new needle, and always 're-thread' your machine.

I hope this helps.

P.S. My father set up many of the Viking dealers on the East side of the Mississippi. I worked in the business all the time I was going to school, and a couple of years after the service (early 60's). I used to 'dream' about sewing machines, and finally got out of the business, but I still fix machines for my family.

Good Sewing, and
God's Blessings,

J. W. Stevens

Nov 03, 2010 | Singer 7442 Mechanical Sewing Machine

1 Answer

Thread tension for regular seam sewing


oil the shaft for the presser bar and keep moving it up and down(it may take a while) until it moves freely. Always use Sewing machine oil Not 3N1 oil.
Tension:
If the thread is loose on the bottom of the fabric, it's actually the top thread is too loose. Think of 2 little elves playing tug of war in your machine, one on top and one underneath. If you have loops on bottom, the top needs to pull harder (tighten top tension). If you have loose thread on top your top tension is probably too tight and your bobbin thread too loose

Mar 23, 2009 | Sewing Machines

2 Answers

Threading a husqvarna huskylock 1001L serger


Solution taken from "Handbook for Huskylock Sewing Machine Models 1001L/1000L/1000"

1. Raise the presser foot by using presser foot lever. When the presser foot is raised, the two thread tension discs in the thread tension control panel are released so that thread passes freely between them. Otherwise thread tension may not be correct.

Important! When threading the needle, always be sure to lift the presser foot lever, and also take care to thread in the proper order.

Threading order:
1. Upper looper thread (green)
2. Lower looper thread (blue)
3. Double chain stitch looper thread (purple) in case of 5 thread stitch or double chain stitch
4. Right needle thread (red)
5. Left needle thread or double chain needle thread (yellow)

Caution!
Because the left thread tension dial (yellow) is used for either the left needle or the double chain stitch needle, these needles will never be used at the same time.

Upper looper (green) sequence:
1. Thread holder (silver triangle openings attached to thread holder stand)
2. Thread guide (flat silver clips just behind thread tension disc)
3. Thread tension disc (circular knobs with numbers for tension setting)
4. Pull thread around upper looper guide and upper looper
5. Pull thread into hole of upper looper

Lower looper (blue)
Repeat 1, 2, 3.
4. Pull thread around guide (see color coded chart inside front serger cover).

Easy threading mechanism (for lower looper)
1. Pull out the lower looper threading lever
2. Thread the lower looper and position the thread on hook of the lower looper
threading lever.
3. Push the lower looper threading lever back to its basic position while
holding the end of the thread.

Caution:
When returning the lower looper threading lever, always make sure that the two
blue triangle marks (directional arrows) meet each other.

Right needle thread (red)
Left needle thread (yellow)
Important: Thread the needles after threading of lower looper and upper looper.
First raise the presser foot lever, and then thread the needle threads in order shown in color coded thread guide.




Jun 24, 2008 | Sewing Machines

1 Answer

Machine not sewing


Make sure you have threaded the machine from right to left, it sounds like the needle thread is trapped under the lower looper thread and cannot form a stitch.........start the threading over from scratch like this:

  1. Lower Looper
  2. Upper Looper
  3. Left Needle
  4. Right Needle
Is there a diagram for how to thread on the inside of the door ?

Follow that slowly and carefully to make sure you have not missed any thread guides on the way, as each one needs to be followed through to ensure correct tension and thread progression.

If you are certain that all threaded correctly, did you have a fabric jam and pulled it loose ? If so, the timing may well be affected.

Post an update and we'll get this right.

Bargain Box

Feb 01, 2008 | Sewing Machines

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