Question about Necchi 4575 Mechanical Sewing Machine

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Top stitch is loose. Looks more like a very loose gathering stitch. underside stitch is not flat, kind of crooked. After sewing for a few inches, the thread bunches up under the feed plate or from the bobbin i'm not sure which. I have cleaned and oiled the machine as the instructions showed.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: needle picks up bobbin thread but then thread gets stuck

I've had similar problems (as well as other problem with the thread breaking all the time and the "shuttle race" thing that holds the bobbin falling out. One very important thing that isn't mentioned in the manual but that the salesman stressed is that you have to use only "Schmetz" brand needles. They are a tiny bit longer, but that makes all the difference in the world if your stitches are skipping. I forgot and used Singer needles and had horrible results.

Posted on Aug 16, 2007

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bargainbox
  • 1388 Answers

SOURCE: Thread gathering under and around the bobbin/plate

Most likely cause is lint in and around bobbin area. If you are using a standard top tension of 4 or 5 and this problem has developed over time, the most likely cause is lint deposited between the tension disks....... if the top tension is loose, or in the tension spring of the bobbin case if the bottom tension is having troubles. In either case you need to remove the lint...... 
Raise the presser foot and with a length of scrap fabric, use an action like flossing your teeth to get between the top tension disks......in extreme cases a probe (old needle) may be used very gently to remove thread and lint, but be VERY careful not to scratch the polished surfaces. 
I have also written a tutorial on tension balance which may be of further assistance, particularly for bobbin tension issues: 

Please TRY the solution BEFORE giving your considered rating.

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 !
 
 

www.bargainbox.com.au

Posted on Nov 30, 2008

SewExpress
  • 41 Answers

SOURCE: bobbin thread/feed dog eating fabric

This is a very common problem with really lightweight fabric and can often be cured (if doing straight stitching) by using a straight stitch needle plate and foot. The wider needle plate and foot openings on newer machines give the machine/thread a wider area to pull the fabric into the machine. By using a straight stitch plate/foot you remove the wide opening, eliminating the majority of the problem.

Also - try using a specially coated needle (Teflon or other non-stick finish). The thread feeds more smoothly through the needle and the needle more smoothly through the fabric, causing less drag into the needle plate opening.

Hope this helps. Don't hesitate to respond to this if you have further specific questions. We're always happy to help

Happy stitching,
Kim & Linnette
www.sewingexpressions.com

Posted on Dec 03, 2008

  • 2 Answers

SOURCE: bobbin thread bunches up creating a tangled mess under the plate

This could either be due to the bobbin being wound too loosely, or the tension on the top thread is too loose. This just happened to me the other day, and I thought it was the bobbin thread, but then I put another bobbin in with a different color than the top thread (this is a huge help in diagnosing thread issues), and I was surprised to find that it was actually the top thread that was a big loopy mess on the underside of the fabric. I fixed it by tightening the tension on the top thread (quite a bit), and everything was fine.

Posted on Jan 23, 2009

  • 66 Answers

SOURCE: How do i thread the bobbin on my necchi 539

take out your bobbin and turn it the other way

Posted on Feb 03, 2009

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1 Answer

My mums lemair Helvetia, when on zigzag only, mucks up every 4th stitch. It forms a thread loop on the underside. And what needle is the correct needle for this machine?


it's possible that the gear or cam that make the zig zag stitch is
worn or broken or loose, there's no way to know for sure with out
having a sewing machine shop look at the machine.
you mentioned the needle, when sewing on cotton you need one
kind of needle and for knits you need a different needle, so
according to what kind of fabric that tell what kind of needle has to
be used for the stitches to come out right.
also check the top tenison--on a scrap fabric,,try to tighten the top
tension and see if the helps stop the thread loops on the underside.

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Bernina activa 210 won't zigzag and has bobbin issues on straight stitch


it's very possible that the machine is slightly out of time & needs to be service at a sewing machine shop
is the fabric & thread & needle compatable with each other?
did you use every thread guide when threading the machine?
is the bobbin in correctly?
is the bobbin warped?

Mar 20, 2012 | Bernina Sewing Machines

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How to do gathered stitches on j3-20 series


Gathering stitches is same on most makes and models, you just set up for a straight stitch but turn stitch length up to 4 and loosen off the top tension by one number, ie turn it down a little. Then sew two straight stitch seams where you want to gather, one at 10mm from raw edge and one at 20mm from raw edge, leaving long thread tails on both. Then draw up the bobbin (underside) thread to gather the fabric.

Jan 04, 2012 | Janome Sewing Machines

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When i do gathers on my machine i use the largest sticth,but the gathers r hard to pull. y/


Stitch length of 4, loosen your top tension by half a number and always pull up the bobbin threads.

If you need to gather yards of fabric then get a gathering foot. Janome make one - it looks like this
10_24_2011_6_57_47_am.jpg

This foot is for creating soft gathers in lightweight fabrics. The underside of the foot is raised behind the needle and has a thick bar in front of the needle to gather the fabric. This works great to create the gathers as you sew. You can also gather and attach a ruffle onto a flat piece of fabric simultaneously, run the flat fabric through the top groove of the foot and the underneath fabric is gathered and stitched to the top piece, you need to keep the bottom piece feeding smoothly though so it takes practice to guide it evenly. Once mastered it is great to ruffle on valances and cushion frills.

Other option is use a ruffler foot, these will make a little ruffle every 12, 6 or 1 stitch so give a set result, and to obtain a more dramatic gather. They look like this.
10_24_2011_7_04_39_am.jpg

The arm of the foot with a C'shape sits over the needle bar of the machine so it is moved up and down to activate the device. The little blade at the front moves backwards at regular intervals forcing a "tuck" of fabric into the feed to be stitched. Again you can ruffle and stitch to straight fabric at once but it is an art to master.

The weight of the fabric you are gathering is obviously the key variable, ginghams and poplins are lightweight so gather easily but if you need to gather something heavy like cordoroy it is going to be a battle and threads may break. If so, stitch two lines of gathers and don't try to do long runs, you'll just break a thread and have to start over.

Another good way is to zig zag over a length of perle cotton, taking care not to actually stitch the pearle at all. You can then gather up the fabric along it, this works well for heavier weights.

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THREAD GET BUNCHED UP UNDERNEATH THE FABRIC, THE STICHES SEEM TO BE INCOMPLETE THE TOP LOOKS GOOD THAN I TURN IT OVER AND THE THEAD IS BUNCHED AND LONG LOOPS OF THREAD ARE LEFT. THANKS LOU


Hi Lou! This sounds like a tension problem--the tension on the top thread is too loose. Try using different color threads on the top and bobbin, then carefully rethread everything. Stitch a couple of inches and check the underside. If the top stitches look fine and the bottom ones are loose and loopy, and with the pressure foot down, tighten the tension. Move the knob or dial (whichever you have) just a little bit. Sew a couple of inches more, and recheck. Continue to sew and recheck, gradually tightening the tension, until you see little if any bobbin thread on the top or top thread on the underside of the fabric.

Let me know if this helps, ok?


Robbie

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sometimes when you reset the top tension dont forget to reset the bobbin tension so try to tighten the bobbin tension

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if there is a mess underneath for more than first few stitches, either your check spring in the needle tension area is set incorrectly, or your needle tension is set too loose (adjustable in sevice menu by tech only) or there is foreign matter caught in tension assembly preventing proper tension.

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5932 knotting every other inch


Try oiling the hook if you haven't recently.
Check you needle plate and hook for damage, they may need to be buffed or sanded smooth.
Check your upper tension discs for lint and double check your upper thread path (proper threading).
There are other things like hook timing, needle clearance or broken check spring that may be wrong but you need a technician for those things.
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