Question about Bernina Activa 140

2 Answers

Bottom stitch keeps getting tangled up after needle change

The needle broke when I was shortening jeans. I replaced the needle, seemingly without any problems. Now, when I sew, the stitch looks fine on the top, but when I turn over the fabric, it's a tangled mess on the bottom.  I've redone top and bottom thread 3 times and don't see anything wrong with it. Please help!

Posted by writerpdx on

Ad

2 Answers

Anonymous

The solution provided sounded above my technical ability, so I took it in. They said the needle and the bobbin got misaligned, so they'll fix it. Thanks for the help, though.

Posted on Oct 23, 2007

Ad

sewwot

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Cheetah:

    An expert who has answered 20 or more questions within one hour.

  • Expert
  • 84 Answers

Hi,

Sounds like the needle has hit the hook.Open the bobbin area door, remove the bobbin and bobbin case. The swing the two lugs that hold the hook retaining ring to the side so you can remove the hook. CAREFULLY inspect the sharp tip of the hook. It will be sharp and 'chisel' shaped. ANY marks, scratches or burrs on the hook must be removed carefully with 180 or 400 grit 'wet and dry' abrasive. It must be as smooth as a 'babies bum' !! If you are not confident, take it to someone to do it for you. The hook is expensive, so don't mess it up!  

Good luck!

Posted on Oct 22, 2007

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Needle stopped penetrating my fabric


you need to replace the needle again, is the needle the right one for the heavy fabric?

Dec 10, 2014 | 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

I have a 2011 Juki DDL-8300N. Has always worked fine but while sewing on denim it suddenly seized up and stopped sewing. The needle is in the lowest postion through the jeans. I am unable to turn the


Your needle probably bent and got jammed. clip threads top and bottom of the fabric and remove... then get in the bobbin area and look for issues.

Sep 30, 2012 | Juki DDL-8300

2 Answers

My machine is skipping stitches


Lower the pressure on the feed dogs, use a stretch stitch, and longer stitch length. Be sure to use a good quality thread, and maybe go lighter weight thread.

Oct 25, 2017 | Janome Memory Craft 9000 Computerized...

1 Answer

I have a Bernina Virtuosa 153 sewing machine that is skipping stitches while trying to shorten a pair of jeans. I changed the needle to a 100/16 and am using all purpose thread.


You may need to increase the foot pressure to cope with the heavy denim material. Look carefully at the material as the machine tries to stitch ... if the foot is not keeping the material firmly on the stitch plate, it might be riding up on the needle (denim tends to be rather 'grippy') which will prevent the thread loop being formed correctly below the stitch-plate and therefore not getting picked-up by the CB hook. Changing to a bigger diameter needle might actually make the situation worse in this case ... go back to an 80 and try again.

Sep 17, 2011 | Bernina Virtuosa 150

1 Answer

The lower thread does not bring up , so that the uper thread does not come in contact with the lower thread .I hear unusaul noise while sewing.All these happend when I tried to sew a jeans .i used a thread...


As a general rule, domestic machines don't like buttonhole twist, that heavy yellow thread you see on the RTW jeans. Sometimes you can put it through the bobbin but use a regular weight thread on top but this means sewing upside down as you'll want the yellow on top. And lots of machines dont like different weight thread top and bottom so it just makes for awful stitching anyway.

Best solution to top stitch jeans is use a regular weight thread, large size jeans needle but thread up two spools of thread on the top with both threads going through the same needle eye. It still may not solve the problem though.

To your machine, firstly change the needle as it may be bent. Then unthread the machine and manually turn the flywheel through a stitch cycle and listen carefully, if you still hear a noise as the needle touches the rotary hook, you've knocked the timing out. Service man visit time.

Probably if you check the manual, it will say 50 weight thread, and you'll need to stick with that in the future.

Those big industrial sewing machines that they top sew jeans on are very different to a domestic SM, many make a chain stitch or fell the jeans seams and are very heavy duty.

Jun 05, 2011 | Toyota STF17 Sewing Machine

1 Answer

I cut off jeans and turned them up to hem. Following all the directions in the manual, I began to sew, but the thread broke after only a few stitches. My thread is all-purpose thread. I tried tips in...


I turned up my husband's jeans using a size 100 needle. You can get easy thread needles that have a small gap in one side that you slide the thread through. There is a good way to turn up jeans and keep the original hem without having to cut them. Have a look at this site http://www.daciaray.com/?p=38

Aug 25, 2010 | Brother CS6000i Computerized Sewing...

1 Answer

Loose stitching underneath. HOW CAN I FIX!!!!


Sounds as though you may have a burr or rough spot on the hook where the bobbin inserts. Run your finger along the edge of the hook to see if there are any rough spots.I'm sure you're going to find at least one from the time you broke the needle.Once you locate it, remove it with an emery stick or small sharpening stone. Polish it so that it is smooth. Should work okay.
sewman7

Jun 27, 2008 | Juki TL-98Q

2 Answers

Thread tension problem when sewing on heavy fabrics


Sometimes when I need to use heavy thread for top stitching to reinforce a seam that has come undone, I will use the heavy thread on the top and regular thread on the bottom. I haven't tried it the other way around for hemming but I would think it would work. I do not currently have a Bernina.

Jan 15, 2008 | Bernina Artista 180

1 Answer

Sewing machine skipping stitches


I have a singer tiny tailor machine. My problem is that the two threads are not getting together to make the stitches at all. Help! What do I need to do? Tammy

Feb 04, 2007 | Janome 2049LX Mechanical Sewing Machine

Not finding what you are looking for?
Sewing Machines Logo

177 people viewed this question

Ask a Question

Usually answered in minutes!

Top Bernina Sewing Machines Experts

Chris Wetmore

Level 2 Expert

190 Answers

Wayne Buss

Level 2 Expert

121 Answers

Harjeet Singh

Level 2 Expert

109 Answers

Are you a Bernina Sewing Machine Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...