Question about Janome MyLock 644D

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4 bobbin thread machine has uneven stitches on the underside

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

bargainbox
  • 1388 Answers

SOURCE: bobbin thread bunching

I agree with brodering about the damage to your bobbin case, it should be smooth all over, as the thread travels across the top surface to form a stitch, and the small step on the underside locates it as the hook spins underneath.

Needle strikes often compromise the surface, as will the hook colliding with the under surface... and although it is possible to gently polish off the damage with fine grain wet & dry (black) sand paper (emery paper) there are limits to the success depending on the degree of damage.

While on the subject, ensure the bobbin case and hook race beneath are clean and free of lint or thread.

For a guide as to setting tensions and the rest, look here

Posted on Feb 24, 2008

bargainbox
  • 1388 Answers

SOURCE: My Janome my excel 23x

Ensure that all is clean and free of lint jams....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 Tension 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 !

If you want 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 Apr 25, 2008

  • 1 Answer

SOURCE: Janome Memory Craft 9500 Troubleshooting

The solution that I found last night was the thread tension. I have never touched the dial, only had it set on 'auto." When I started playing with it, I realized the top thread should be really easy to pull through the machine and it wasn't. I started turning the dial (to 3 or 4) and the thread slid through the machine perfectly. No more birds nest! I really thought it was bobbin initially because of the horrible sound it was making.

Posted on Jun 05, 2008

  • 729 Answers

SOURCE: won't stitch properly

ever tried adjusting the thread tension control? clean if possible
tighen it more, loose tension adjustment causes loose stitch and tangling of the thread.

Posted on Nov 01, 2008

  • 2 Answers

SOURCE: thread gets caught on bobbin and jams

You may need a new bobbin case if your machine is an older model.. Over time the cases get nicks in them causing thread to catch on it. Have you lubricated the bobbin area? Needs one drop of oil for every ,I believe it is 25 hours of usage. That may take care of it. The oil goes under the bobbin right in the center of bobbin case. Remove your bobbin before applying the oil. i hope this helps you. Good Luck

Posted on Jan 08, 2009

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My pfaff2044 started sewing uneven stitches. It can sew nice then next second leave a big stretch then sew normal again and then itll leave a bigger stretch it also wont blind stitch.


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Dec 12, 2015 | Sewing Machines

1 Answer

Why is the bobbin thread looping and catching on my sewing machine? The stitches are uneven, too.


Hi Sylvia,
Your problem is an un-matched tension of the threads. You mentioned doing an adjustment recently. That is the problem area.
If your bobbin thread develops loops on the top side of the fabric, you need to tighten the bobbin tension.
There is no easy method for this and you will have to do it slowly -
tighten, test, re-tighten, test.... until you get a near perfect stitch.
I haven't come across a portable device specifically designed to set thread tensions.

Oct 08, 2014 | Dual Sew 3400 Mechanical Sewing Machine

1 Answer

My stitch does not sew on right side of fabric. I sew & see the underside of the stitch. I remove the fabric & the stitch is on the underside.... Never known sewing machine to do this. Help!!


Hi. first thing is to remove the threads from the machine, top thread and the bobbin, and replace to manufactures instructions. If still the same the problem sounds as if there is no tension on the bobbin [under] thread, adjust to a light tension. Then adjust top thread tension until the knot is in the middle of the cloth. Most times people keep tightening the top tension..

Aug 10, 2013 | Brother XL-2600I

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Drop in bobbin on singer 6234 will not thread empty Bobbiin thread winds around underside od bobbin


try using a different bobbin and see if that helps, if it doesn't
then the machine may need to be checked to see if there is
something wrong with the hook and the hook race.

Nov 29, 2012 | Janome Jem Silver 662 Mechanical Sewing...

1 Answer

Thread on the bottom side of stitch is all bunched up


Try these suggestions
1. Change needle
2. Rethread the machine--top --make sure to use every thread guide
3. Take the bobbin out --make sure it is inserted correctly into the bobbin
Case, & make sure the bobbin is turned the correct way
4. make sure the thread has not come off the thread take up lever
5. Clean under the needle plate & in the bobbin area for lint or threads

Oct 09, 2012 | Sewing Machines

1 Answer

The thread keeps coming off the needing when i sew


Hello

I would suggest that you revisit the threading up in your manual and double check that the top thread is under tension.

However, if the stitiching on top of the fabric is wonky, this is your bottom tension too loose, and if stitching on the the underside of the fabric is loose, its the top tension causing it.

Quite often bobbin winding can be the cause of bad stitching so pull out the manual and wind a bobbin carefully following the instructions, making sure that the thread is under gentle tension as it winds. What you don't want is for the thread spool to bounce around as it unwinds onto the bobbin as this gives uneven tension of the thread and when you then stitch a seam, the thread relaxes in different amounts causing puckering.

So wind at 3/4 speed, and gently guide the thread onto the bobbin so it fills evenly across the whole core. And ensure there is tension on via a tension guide if your machine has one. If not, then place the curved handle of your scissors onto the top of the thread spool and hold it there as you wind, which holds the spool down and keeps the thread coming off it smoothly.

Always raise the pressure foot when you thread the machine so the top thread goes into tension fully. And new needle for each new sewing job is really important, make sure it is the right size and type of needle for the fabric you are sewing.

Aug 02, 2011 | Brother LS-2125 Mechanical Sewing Machine

1 Answer

My tension on my machine is wrong. when i try my design the bobbin thread shows on the top and i have tried all the tensions on the machine. i just got it back from a dealer that fixes them. but i am still...


Are you using machine embroidery thread top and bottom? Madeira or something similar with a silky sheen. Always, same thread brand and weight top and bottom although you may want different colours for some tasks.

Also you will need stitch and tear or some other suitable stabiliser under the fabric to give it body and support during the stitching.

Have you embroidered successfully on this machine in the past and this problem has now occured?
If so, I would take it back to the dealer and ask him to test sew a design with it and see if he can get a good result out of it.

If you are new to machine embroidery then perhaps visit http://sewing.about.com/od/machineembroiderytips/Machine_Embroidery_Tips_Information.htm for lots of help and advice on machine embroidery.

Also I'd suggest that you revisit how you wind the bobbin - check your manual or there is more on this on sewingabout.com as it is essential to get a good smooth wound bobbin with no jerks or unevenness - you don't want the thread stretched unevenly onto the bobbin as it will relax unevenly when stitched out.

Then revisit bobbin threading into tension device, bobbin thread showing on top of fabric is usually indicative that there is insufficient tension on the bobbin thread, check that it is fully into tension and bobbin is in the right way, you always want the thread to come of the bobbin in a "V" shape, and bobbin should turn anticlockwise as you pull thread from it usually (but please check machine manual for specific threading for this machine, there is always the one exception).

Finally, does your machine have tension adjusments on the bobbin case? some have a little dial that will allow you to make small adjusments, although usually not necesary, adjusting the top tension is usually all that is needed.

I hope this is of assistance to you, obviously if you have tried all the above already, then I'd go back to the dealer and see if he can get a better result for you.

Jun 21, 2011 | Brother PE-150V Computerized Sewing...

2 Answers

Hi I am having problems with the top tension on my Singer 2662. I am following the instruction manual but nothing I seem to try works. Or it works for a while and then the next time I sew I have problems...


I would suggest that you revisit the threading up in your manual and double check that the top thread is under tension.

However, if the stitiching on top of the fabric is wonky, this is your bottom tension too loose, and if stitching on the the underside of the fabric is loose, its the top tension causing it.

Quite often bobbin winding can be the cause of bad stitching so pull out the manual and wind a bobbin carefully following the instructions, making sure that the thread is under gentle tension as it winds. What you don't want is for the thread spool to bounce around as it unwinds onto the bobbin as this gives uneven tension of the thread and when you then stitch a seam, the thread relaxes in different amounts causing puckering.

So wind at 3/4 speed, and gently guide the thread onto the bobbin so it fills evenly across the whole core. And ensure there is tension on via a tension guide if your machine has one. If not, then place the curved handle of your scissors onto the top of the thread spool and hold it there as you wind, which holds the spool down and keeps the thread coming off it smoothly.

Always raise the pressure foot when you thread the machine so the top thread goes into tension fully. And new needle for each new sewing job is really important, make sure it is the right size and type of needle for the fabric you are sewing. if you aren't sure what size is right www.sewing.about.com has great tips and general machine info, plus needle guides.

Jun 11, 2011 | Singer 2662

1 Answer

Why is my machine skipping stitches


this is caused by uneven winding of the bobbin, sometimes the spool of thread winds unevenly when it travels up and down the spool. the best solution i have found is to use small spools of thread when winding the bobbins

Dec 02, 2009 | Kenmore 15516 Mechanical Sewing Machine

1 Answer

Stiching


It's very possible the bobbin is in upside down and the thread is coming out of the lower tension. Pull on the thread and the bobbin should turn counter clockwise if it is correct . If it turns clockwise, flip the bobbin over , put the thread through the lower tension and try it again. The topside stitch is loose either because the lower tension is loose(or non-existent) or the top thread is too tight.
sewman7

Jul 06, 2008 | Janome 4623 Mechanical Sewing Machine

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