Question about Kenmore 12912

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Im trying to hem a pair of jeans when i start it jams up im using a number 16 needle ive checked everything twice ive even called the help number and they couldnt help me i just dont understand what the problem is when i sew regular cotton fabric i have no problem could it be the feed dog is out of alignment an if it is how do you fix it?

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If you think its the way the material is being moved, I would check the pressure on the presser foot. On my machine, there a knob with 1,2,3 to adjust, its vertically above the foot on the top of the machine(Check you manual). Sometimes the jeans hem is just too thick on the side seam. I just skip that part, or move the needle through that part by using my hand on the wheel, so the stitsches look ok, but it should do the rest of the hem fine. Try the thinnest part of the hem first; good luck

Posted on Sep 14, 2010

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1 Answer

Why does my machine keep jamming?


Is this a mechanical machine you're running on low speed? The usual motor doesn't have much torque at low speed (unlike the computerized machines with stepper or servo motors that have full needle force at any speed), and this can contribute to jamming.

Also check to make sure the bobbin case is in completely and not wobbly.

May 25, 2014 | White Sewing Sewing Machines

1 Answer

Sewing jeans hems


You need a couple of things. One is to flatten the seams before you try to sew them. One of the best is to spread the hems on a wooden cutting board or simiilar smooth surface and beat the hems flat with a flat faced hammer. This is an official sewing hammer: http://www.fashion-incubator.com/archive/tools_and_supplies/ and it will compress the fabric so it doesn't lift your presser foot up and let the tension off the top thread (which is what's causing your looping problem).

For crossing thick seams, you need a shim to keep the presser foot flat while sewing. These are usually called hump jumpers or jean-a-majigs, and are a couple of bucks. Or you can use a fold of fabric in the same way: http://www.youtube.com/watch?v=WbYenXIDaDk http://www.youtube.com/watch?v=ZKdW_vIZLBo

Alternatively, you can do the jeans hem alteration that pros will charge you more for (because it's "fashionable"), and it's also faster and easier. Often called Euro-hemming: http://www.sewmuchado.com/2011/06/tutorial-how-to-hem-jeans-and-keep-the-original-hem.html

Feb 03, 2014 | Elna Sewing Machines

1 Answer

I'm trying to sew jeans hem and stitches are uneven on top and loops are showing underneath. Also the foot and needle will not sew over cross seams and thread keeps getting snarled up underneath. Tha


a lot of machines struggle with denim because it is such a heavy and dense textile. Many domestic machines won't stitch it at all due to this. Things you can try however:
  • Denim needle, this has a deeper groove at the back and is a heavy gauge needle, or use size 110 if you don't have denim needle.
  • Bash the side seams with a hammer in the area you will be stitching, to soften up the fibres.
  • Use a seam jumper, this is a piece of plastic to put in back of the presser foot as you approach a cross seam to help keep the presser foot pressure even across the fabric. Sometimes called a "thingy-a-jean" or similar.
  • Don't bother trying to use the heavy gauge yellow jean thread unless you put it through the bobbin and sew with the right side down. But even then, many machines can't handle having this heavy thread underneath and the regular 50 cotton on top, my Janome 1600 won't do it.
  • put your machine on slowest speed if you have a variable setting and turn the flywheel to assist it through the heavy side seams.
Personally, I never bother with the twice turned hem on denim if shortening, I just overlock the raw edge, turn up 1 cm and stitch around in a matching blue thread so it is seen as little as possible.

Feb 03, 2014 | Elna Sewing Machines

1 Answer

How to fix your needle assembly on your sewing machine


Sounds a bit serious, jeans fabric is dense and thick. Many machines struggle especially sewing hem over side seam with 6+ layers. You need jeans needle size 90, 100 or 110. Maybe take in for a service as the needle assembly could be out if time too 10_23_2013_1_43_35_pm.png

Aug 01, 2013 | Sewing Machines

1 Answer

While hemming jeans with my Janome 7061NX (using a 100/16 sharp), it skips stitches at the thick seams.


try a denim needle
Skipped stitches
1. The needle is not inserted correctly
Remove needle & reinsert needle( flat side towards the back of machine)
2. The needle is damaged
replace with new needle
3. The wrong size needle is being used
Choose a needle to suit the thread & fabric
4. The foot not attached correctly
Check & attach correctly

Apr 18, 2012 | Sewing Machines

1 Answer

I have been sewing denim, and the top thread keeps breaking at the needle. What adjustments do I need to make. It also bunches from the bobbin.


Are you trying to use a heavy thread like buttonhole twist through the needle like the yellow thread on store bought jeans? Most domestic machines will not cope with this heavy thread and it will be too large for the eye of the needle too.

If you are using regular weight 50 polyester thread and its breaking then it could be because the top tension is too tight. Just loosen off 1/2 a number on top tension dial and see if this helps.

If possible, buy a pack of jeans needles size 100 too, these are blue coated with teflon I think, and makes it easier to slip through denim which is a very dense fabric.

Hemming denim jeans is probably one of the toughest jobs for a domestic sewing machine so if you are trying to do this, its a good idea to take it slowly and use a "humpjumper" which helps to maneouvre over the thick side seams.

However, even with all the above, many machines won't sew more than one layer of heavy dense weave denim.

Jul 20, 2011 | New Home HF-106

1 Answer

I am attempting to hem a pair of jeans and when I sew the top thread isn't catching properly and is making big loops between when it DOES catch. I have tried adjusting tension, stitch length, almost...


iam reliable informed that you will need to change the needle by the one who controls this machine in our house for different thickness materials you need different size needles ,or you will get exactly the problems you describe ,iam told to look in the book and see whats suggested for this sort of material ,as some of the smaller machines will not go through tougher type materials and some jean material you will have to do it by hand with a special long needle ,the type of needle i use on my boat for the awnings and sail .

Sep 06, 2010 | Janome 659 Mechanical Sewing Machine

2 Answers

Hi, I purchased my Sapphire330 in Jan 09 and use it maybe 2 hours per week. I began having issues when I hemmed a pair of jeans. I followed and set all the right settings (as the manual instructs) and...


sounds like when it jammed and broke the needles, the hook/needle timing got out of line. How does a zig zag stitch look? A wide zig zag stitch should have a dot of the upper thread on each side on the back where it enters the fabric. The bobbin thread should be seen from back crossing back and forth. Use different colored threads for top and bottom threading so you can see the difference. Good luck.

Jan 29, 2010 | Husqvarna Viking 1

1 Answer

Bottom thread is loose and loopy


I would use a denim needle, these are blue coated to slide through the fibres, usually in size 100. But the looping is more about the weight of the seam, ie thickness. Also aremyou trying to use thick yellow jeans thread on the outside and normal thread inside? This is difficult to achieve as the thick yellow thread wont go through needle, you need to use it on the bobbin and sew right side down. I have never had much success with jeans hems on my Japanese machine and usually end up using my industrial Singer to do it. You can try usinf a seam jumper Sometimes called a jeans-a-ma-jig, this helps give leaverage to the feed dogs as you approach the side seams. Also, belt the seams flat with a hammer first.

Jan 18, 2010 | Elna Heirloom Edition 6005

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