Question about Kenmore Drop-In Bobbin 505S-21BH Mechanical Sewing Machine

1 Answer

It sounds like it's sewing but the stitches don't connect (top and bottom)

Posted by Anonymous on

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  • Kenmore Master
  • 1,388 Answers

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

fwadley
  • 482 Answers

SOURCE: Won't sew

you have tread in the bottom of it. and needs a cleaning. check the tension, most set on 3

Posted on Dec 16, 2007

bargainbox
  • 1388 Answers

SOURCE: My bottom thread is loose when sewing a straight stitch

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 !


Posted on Jul 24, 2008

talk2ginny
  • 34 Answers

SOURCE: My Bernina 930's lower tension

Hi - you might have a dirty bobbin case, or need a new one. IAfter awhile, little teeny dust bunnies can collect in your bobbin case and cause your bobbin tension to go wonky, especially if you use cotton thread. If you happen to have an extra bobbin case, try using the new bobbin case to see if that solves the problem. Otherwise.....

  • Remove your bobbin case and take out the bobbin. Find a small, stiff brush like the one that came with your machine and stand in very good light. Brush out the inside of your bobbin case, and push one or two bristles of your brush into any opening you can see. If you see any trace of dust but you can't get it out, use tweezers to gently pull the dust out. Now look at the outside of your bobbin case. In the small opening where you insert your bobbin thread into the bobbin case, there is a small piece of metal with screws in it the lays over the bobbin case. Brush that area carefully, and again, insert one or two bristles under than piece of metal and into any other small opening where the bristles will fit. Try sewing again. If you are still getting loops, take out your bobbin case with the bobbin thread still inserted and grab the bobbin thread with two fingers. Let go of the bobbin case - sort of like you are holding a yo-yo. If the bobbin case starts to drop as soon as you let go, your bobbin tension is loose. If the the case doesn't move, gently snap the bobbin thread you are holding and see how far the bobbin case moves down toward the floor (you might need to try this a couple of times, the bobbin has a nasty habit of flying out). When you do the snap, the bobbin case should move down about two inches and stop. If do not know how to adjust the bobbin tension, either check your manual or take the machine in for service.
  • If you haven't already, it's a good idea to remove the thread plate that sits under the needle and clean that area out with your brush. Also, get a really good flashlight and check the area where you insert your bobbin case. Gently turn your fly wheel and look inside the hook area - remove any dust or bits of thread.
In general, you should oil your machine as indicated in your manual as often as directed. You should change your needle every 10 hours of sewing - or each time you start a new project, and you should take your machine in for service every one or two years - even if you only use it once and awhile.

Hope this helps, Ginny

Posted on Jan 31, 2009

  • 255 Answers

SOURCE: I have an older kenmore sewing machine. It's been

When I have run into similar problems with my older Singer, it's because there is a bit of thread caught somewhere in the bobbin mechanism that doesn't allow the shuttle to run freely. Take the bobbin assembly apart and use a bright light to see if you see any bits of thread in there.

Good luck and let me know if this works!

Posted on Jan 15, 2010

  • 1116 Answers

SOURCE: SEWING MACHINE WILL NOT STITCH

Always thread a sewing machine with the presser foot up - this will make sure the tension feature has control of the top thead.

Make sure the needle is properly placed - usually with the flat side toward the back of the machine.

Posted on Feb 22, 2010

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2 Answers

Why is my bottom stitching nesting? I can not get it to sew without none of the bottom stitching sewing


sounds like the tension is wrong somewhere. Or machine incorrectly threaded.

Apr 27, 2017 | Sewing Machines

1 Answer

Why won't it sew? top and bottom stitches won't connect


It sounds like you may either have the wrong needle installed or the needle is not inserted properly. Have you recently replaced your needle? Did you replace it with a needle recommended by the manufacturer? If you replaced it, did you put the flat side to the back?

Nov 14, 2014 | Janome Sewing Machines

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Loose bottom stitches on Singer 1507


top tension must be adjusted to fix loose stitches of bottom stitches
adust the top tension one letter or number higher and sew on a scrap
piece of fabric till stitches look correct,, here is a free manual
http://www.singerco.com/uploads/download/36952a1312a6d8436174ef874f3662471a946b64.pdf

Jan 06, 2013 | Singer 1507

1 Answer

The bottom stitching looks like a line and not stitches the top stitching is fine


try adjusting the top thread tension and see if that helps
also try changing the thread.
also change the needle--make sure it's the right needle for the fabric
being sewed.

Dec 13, 2012 | Juki DDL8300N Sewing Machine

1 Answer

I altered the stitch to zigzag and now it wont stitch straight or anything!


try changing the needle
rethread the machine top & bobbin
make sure the bobbin is not warped or damaged
adjust the top tension one number or letter higher till the stitch looks normal
if these suggestion don't help then the machine needs to be serviced

May 11, 2012 | Necchi Sewing Machines

1 Answer

Why won't my Bernina Activa 140 sew the blind hem stitch?


Are you absolutley sure you're not getting a problem with stitch formation on, for example, wide zig-zag. Check again, using a different colour top and bottom and make sure that the stitch is being formed properly with only the top colour on top and bottom colour on the bottom. It sounds as though the bottom loop is not being picked-up by the hook properly. Make sure you've thoroughly cleaned-out any fluff under the stitch-plate and remove the hook/shuttle and give the hook race a good clean and give it a single drop of oil, even if you've got the lightweight part-plastic hook/shuttle fitted.

Nov 19, 2011 | Bernina Activa 140

1 Answer

My singer 2010 sewing machine will not stitch. it has a cruchy noise when turning the wheel :( The bobbin wont catch with the needle under as well :( is it me doing something wrong or the machine?


Sounds like it could be a broken bottom or top gear, you would need to take the bottom and top off to check but don't touch any electronic parts

Aug 24, 2011 | Sewing Machines

1 Answer

Stitches missing on the bottom of fabric, forming big loops, while top of fabric stitches are normal


It sounds as if you have a tension problem. Let me give you instructions for adjusting the tension on anysewing machine. Be sure to have a scrap piece of the fabric you are using andthread the top of the machine with a different color of thread than thebobbin-it'll make it easier to see what's going on. Thread your machine with the presser foot UP. The disks that control the tension (threadgoes through them) are tightened up if the foot is down. Change the machine tension with the presser foot DOWN.Because the disks won't be engaged (see above) if the foot is up, the diskswon't move. Start at the middle setting, 3. Go up to tighten, decrease toloosen. Each machine is different, even 2 different machines of the same model.The best thing to do is start at 3 and use a different color in the top andbobbin thread so you can easily see what changes to the tension do to yourstitches. Now use a straight stitch a sew 3 or so inches. Take a lookat the top and bottom of the fabric. You don't want to see any (or at least notmuch) of the other color showing from the other side. Loops on the bottom of the fabric means you need to tighten(increase) your top tension. If you're stitches on the bottom are causingpuckering, then you need to loosen you're top tension. For the most part, youreally don't want to touch your bobbin tension-leave that to a repairtechnician. The factory setting shouldn't be touched except by someone whoreally knows what they're doing. Keep sewing a few inches at a time until you have the resultsyou want. Now you're tension is where you need it!

Jun 10, 2011 | Brother XL3750 Mechanical Sewing Machine

1 Answer

Stitches are not connecting top to bottom


Try re threading the machine with the presser foot up.

When you thread with the presser foot down, the thread/string cannot properly enter the tension control.

No control = looping stitching that pulls out.

If you do not have a manual, you may be able to download a free one at Brother's website.

Feb 22, 2010 | Brother Sewing Machines

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