Question about Necchi 6015 Mechanical Sewing Machine

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The top thread is to loose and sometimes it skips a stitch

When you pull on the end of the top thread it just pulls out also sometimes, not everytime,the bottom thread is looped on the back of the material.

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  • Contributor
  • 36 Answers

Increase the upper thread tension, or loosen the bobbin tension to balance them. Put in a new needle too. Check that the needle is in correctly.

Posted on Nov 19, 2014

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6ya6ya

6ya staff

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Posted on Jan 02, 2017

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Anonymous

  • 12 Answers

SOURCE: my necchi mod.910 i cannot get the machine to do

The Necchi machine has a lever in the bobbin area that lets you move the feed dogs up and down. If you accidentally moved that, the feed dogs are in the down position and won't feed the fabric forward. Make s ure you can feel the feed dogs slightly above the plate. If they aren't move the lever until they do. :)

Posted on Jun 30, 2009

Anonymous

  • 26 Answers

SOURCE: top thread will not pick up the bobbin thread

Timing is off, is is possible that you broke a needle or sewed over a pin. timing needs to be re set by a professional.

Posted on Aug 22, 2009

RickE1

Rick

  • 202 Answers

SOURCE: I've got a Necchi 535FA with a bobbin thread that doesn't hook.

Sounds to me like you may have put the needle in backwards. The flat side should be to the back.
Rick

Posted on Aug 29, 2009

bargainbox

Hassy

  • 1388 Answers

SOURCE: I am hemming blue jeans. The top stitch looks

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

Best Wishes
Martyn
Bargain Box in Australia

Posted on Oct 04, 2009

paj42

  • 1116 Answers

SOURCE: underside of seam big loose loopy stitches, top

When you thread the machine always lift the presser foot first.

This opens the tension and allows the thread to properly enter and then guided according to the tension setting.

When you thread a sewing machine with the presser foot down, the tension is closed and the thread cannot be guided though this device as intended and the result is thread not being fed through to the needle as it should be.

It looks like a bobbin issue, but is usually not.

Open the needle plate and bobbin and clean this area and the feed dogs from time to time to remove lint, which also can cause improper stitching.

Posted on Feb 19, 2010

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1 Answer

The zig zag stitch is on the bottom of the fabric instead of the top how do I fix this for a Singer sewing machine model 7015


In two words, this sounds like a problem with: thread tension. Quite possibly to the point of having an entirely mis-threaded machine, whether because the thread was not routed correctly, or because parts of the thread path are missing.
(Let's review - just for a sec - the basics of how the stitch is formed. The needle, carrying the upper thread in its eye, penetrates the material. When below the material, the needle begins traveling back upward, creating a loop in the thread. (Depending upon the type of machine, either a hook or a shuttle) then pulls this loop so that the lower/ bobbin thread runs then through it. Then, as the needle retracts further upward, an arm (between the tensioning disc/spring and the needle thread path) pulls upward of the thread, tightening the stitch into place.

If, for example, there is no tension at the tensioning disc/spring, that arm will take from the thread spool instead of tightening the stitch into place.

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