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Why stitch length changes by itself when sewing

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

bargainbox
  • 1388 Answers

SOURCE: stitching looping

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.....the question you pose could have 2 meanings....this reply is for looping thread.

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....

cc3f045.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.

1eade63.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. ie a different colour top and bottom just for the test.

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 consistant diameter with good thread, and less compensating to be done by your tension plates and less thread breaks !

If you need any more help with this, just post back here, or, drop a line through the "Contact Us" page at www.bargainbox.com.au

Posted on Feb 23, 2008

Trifect7
  • 57 Answers

SOURCE: How do I change the stiches?

You can do all of these stitches by using different combinations of your stitch selector, stitch width and stitch feed knobs, for instance, on the panel I can see on your machine:

http://www.jo-ann.com/joann/product/images/52659.jsp?CATID=cat3122&PRODID=prd11333

Stitches 1, 2 & 3 are straight stitches, centered, left and right. Really basic stuff, not different stitches at all. 4,5,6,7 & 8 are zig-zag stitches of different widths. 9 is the widest zig-zag (no. 8) on a finer stitch length, etc...

I think you should try and get an instruction manual for your machine. After a lengthy search of my usual manual sources, I've determined that that this may not be so easy. I think you should contact White on their 800 number and let them try and help you... 1-800-331-3164.

If you found this helpful, please vote generously as I receive nothing other than acknowledgement for my time.

Posted on Mar 08, 2008

  • 1027 Answers

SOURCE: How do I change the stiches?

The brother website has a users manual for it that can be downloaded. Use this link to get it:

http://welcome.solutions.brother.com/bsc/public/us/us/en/doc/manual_index.html?reg=us&c=us&lang=en&prod=hf_ls2125eus&type2=5&flang=English&dlid=

Posted on Jul 10, 2008

Mimito7
  • 128 Answers

SOURCE: Consew Industrial Machine 2270 stitch length dial not working

Sounds like it is either out of time or the adjuster spring needs to be replaced.

Posted on Apr 19, 2009

  • 1 Answer

SOURCE: Singer Touch Tronic 2001 Sewing Machine Stuck on Sewing Straight Stitch Only

I had a similar problem a couple of years ago. I finally figured out that I had the straight stitch needle plate (the one with the single hole), rather than the zig zag needle plate (the one with the curved hole). When I changed plates, it worked fine.

Posted on May 27, 2009

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2 Answers

How do I correct stitch length mechanism to produce 6 stitches per inch?


the stitch length is governed by the cam action connected to the walking foot
that means that the stitch length is governed by the amount of material that is pulled through in the period of time that the needle comes up and goes down
normally the cam action is set by the stitch length lever/ reverse lever
if there is a necessity for a longer stitch, the cam would have to be changed on the drive shaft underneath
That will require a discussion with a sewing machine mechanic to determine if there are cams or other linkages that can be fitted to alter the stitch length for the manufactured maximum

Oct 09, 2016 | Sewing Machines

1 Answer

Is a satin stich programed in the machine.


Perhaps newer machines have it, but usually the sewists programs it. All it requires is a wide stitch and short stitch length. The length is adjusted so the thread actually covers the fabric between stitches, but does not overlap itself. Even if the sewist has a programmed satin stitch but there may still be some required adjustments needed since the thickness of the thread will alter the way the stitch looks.

Sewing Perfect Satin Stitch Wildly Wonderful Wearables Patterns Notions...

..

Mar 20, 2016 | Sewing Machines

1 Answer

How do you change the stitch density?


How close the stitches are to each other? Stitch length?

There is a stitch length selector on your sewing machine. The owner's manual is the best source for information. Technically, the stitch length selector increases the movement of the feed dogs. The feed dogs pull the fabric under the presser foot. Increase the stitch length, the feed dogs increase movement and pull the fabric through faster.

...

Feb 29, 2016 | Sewing Machines

1 Answer

Stitch length will not change


Setting Stitch Length: A Quick Look at How and Why ...

www.sew4home.com/.../sewing.../setting-stitch-length-quick-look-how-a...
Mar 3, 2015 - The majority of sewing machines indicate stitch length in millimeters. A 2.4 stitch length means each stitch will be 2.4 mm long. ... When you adjust the stitch length, it's not the needle that is changing, it's the feed dogs (those ...

How to Select Stitch Length ' Sewing Lessons - YouTube

? 2:40
https://www.youtube.com/watch?v=YqwHtYpKBzo
May 31, 2011 - Uploaded by HowcastArtsRec
Learn how to select stitch length when using your sewing machine for ... also not so small that it will take forever to get through your machine.

How Do I Fix My Sewing Machine: Troubleshooting Your ...

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Jan 24, 2016 | Sewing Machines

3 Answers

How do you change the default stitch length for the straight stitch.


A setting change while you are sewing should not happen. Sounds like you will have to take your machine in for service.

Apr 11, 2015 | Janome Memory Craft 9000 Computerized...

1 Answer

Get a straight stitch


Your tension shouldn't need changed when you change the length of the stitch. Start at C-D for a start. Use rags to test. Your stitch length is chosen by the slide handle on the bottom. By moving to the left your length of stitch will increase and opposite will decrease the length. Anyway, your tension for the fabric may need to be set with a test piece. After that your chosen length shouldn't need any change of tension.

Dec 07, 2014 | Simplicity Celebrity S210 Mechanical...

1 Answer

Irregular stitch length in machine sewing


1. Lengthen your stitch length

2. Use your even feed foot (walking foot attachment)

Nov 30, 2012 | Sewing Machines

1 Answer

The machine isn't making stitches. It's threaded correctly. I have been sewing leather recently and it's been acting up since then. I have cleaned the bobbin area. And have adjusted the tension...


Hello

Adjust the Stitch Length;

To make longer stitches, set the stitch length to a higher number. On many sewing machines, four is the longest possible stitch length and two is average.

To make shorter stitches, set the stitch length to a lower number. At a zero, the sewing machine may not actually make stitches, since the needle will go up and down in one place.

Cut a small scrap of fabric, preferably the same type you want to sew with.

Sew a few test stitches on the scrap. Examine the stitches to make sure they're the length you want.

Adjust the stitch length again as needed.

Jul 12, 2011 | Singer Sewing Machines

2 Answers

Changing stitches on a White 1418 sewing machine...


I have a White 1418. Here's how you do it:

1. Attach the buttonhole presser foot (should have come with your machine) and place the fabric underneath.
2. Set the stitch length knob to 0, the zigzag width knob to 5, and set the needle position to center. Sew 3-5 stitches.
3.Change the stitch length to 0.5, the zigzag width to 2, and the needle position to left. Sew to the entire length of your buttonhole.
4.Set stitch length knob to 0, zigzag width knob to 5, and needle position to center and sew about 3-5 stitches
5. Set the stitch length knob to 0.5, zigzag width to 2, and set needle position to the right. Pressing the R button (reverse button), sew up to the top stitches.
6. Remove the fabric and open the button hole with a button hole cutter.

Sounds complicated, but it's really easy. I love this machine, you just have to know how to use it!

Sep 18, 2007 | White Sewing 1418 Mechanical Sewing...

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