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What is the proper tension number for a normal straight seam

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Usually, the midway point of the upper tension dial is the standard factory setting. However, machines change with age and use. The correct tension is when the top and bobbin threads meet in the middle of the fabric. (However, that means you should test/reset the tension whenever you change projects because different fabrics may require a different tension setting.) Don't be afraid to adjust the top tension. You know where it started, so if you turn the wrong way, you can always undo it.

Adjusting the bobbin tension is usually a last attempt as it is very sensitive and is difficult to undo. Bobbin tension very seldom requires adjustment.

HINT: When threading the top thread, ALWAYS RAISE the presser foot and rethread from the beginning. Install a brand new needle when beginning a new project, after 8 hours of sewing, or if the needle strikes something on the machine. (A new needle is very inexpensive when compared to frustration, damaged fabric, or machine repair expenses.)

Understanding Thread Tension Threads

Sewing Lesson 10 How to Fix Tension on Your Sewing Machine

Posted on Apr 25, 2017

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2 Answers

How to adjust the bobbin tension.


According to the manual, you should not need to adjust the bobbin tension (and I located other sites which stated the bobbin tension cannot be adjusted on this machine). Apparently, all the tension adjustment is accomplished through the upper thread::
"EN Thread Tension Upper thread tension Basic thread tension setting: "4". (1) To increase the tension, turn the dial to the next number up. To reduce the tension, turn the dial to the next number down. A. Normal thread tension for straight stitch sewing. B. Thread tension too loose for straight stitch sewing. Turn dial to higher number. C. Thread tension too tight for straight stitch sewing. Turn dial to lower number. D. Normal thread tension for zig zag and decorative sewing. Correct thread tension is when a small amount of the upper thread appears on the bottom side of fabric. Lower thread tension The bobbin tension has been set correctly at the factory, so you do not need to adjust it. Please note: - Proper tension setting is important for strong seams. - There is no single tension setting appropriate for all stitch functions, thread or fabric. - A balanced tension (identical stitches both top and bottom) is usually only desirable for straight stitch construction sewing. - 90% of all sewing will be between "3" and "5". - For zig zag and decorative sewing stitch functions, thread tension should generally be less than for straight stitch sewing. - For all decorative sewing you will always obtain a nicer stitch and less fabric puckering when the upper thread appears on the bottom side of your fabric. 1 A B C 22 D"

Doing further research, I found this statement on a machine review site:
"After reading reviews online from where I've bought my drop-in bobbin machines, I think many of the negative reviews are due to the bobbin thread coming up without laying across the bobbin. It can cause the stitches to look very sloppy and no amount of tension adjusting can fix the stitches."

There are several machine review sites wherein 4423 owners stated their disappointment in the 4423's performance. Some said the machine failed almost immediately and others said the machines developed problems when sewing heavy fabric.

Apr 26, 2015 | Singer 4423 Sewing Machine

1 Answer

I would like to know how to set the machine up for polyester/spandex material


You need a ball point size 70 or a jersey 70 if you can get it. Stitch length 2.3 to 2.5. Re tension, just normal tension setting. If the machine is sewing an evenly balanced zigzag on regular cotton fabric, then tension is fine. If you find the straight stitch on your fabric pops under stretch, then try using a very small zigzag to put some flexability into the seam.

Mar 28, 2013 | Bernina Activa 140

1 Answer

Bernina minimatic 707 not sewing evenly


Sounds like it's not threaded properly and or you have tension problems. Re-thread with the presser foot UP. Sew a test seam. If you still get loops loosen the upper tension... a little at a time. Sew tests seam after each adjustment.

Sep 02, 2012 | Sewing Machines

1 Answer

Top tension has to be turned all the way down to get good stitch, then thread gets caught in bobbin and lower hooping on thread..


Grab some scrap fabric of the same type you'll be sewing. Tighten your top tension and test sew until you see until you see the top thread of a seam go like a straight line and the bobbin thread loops on top of the seam. Then back off of the top tension until those loops disappear.

If you never see it the top thread go like a straight line... your top tension needs to be cleaned... and make sure you have the pressure foot UP when you thread the upper thread.

Aug 03, 2012 | Sewing Machines

1 Answer

How to do gathered stitches on j3-20 series


Gathering stitches is same on most makes and models, you just set up for a straight stitch but turn stitch length up to 4 and loosen off the top tension by one number, ie turn it down a little. Then sew two straight stitch seams where you want to gather, one at 10mm from raw edge and one at 20mm from raw edge, leaving long thread tails on both. Then draw up the bobbin (underside) thread to gather the fabric.

Jan 04, 2012 | Janome Sewing Machines

1 Answer

What setting do i use for working with silk on a brother xr52 don't have manual


You can download the manual for your machine from the Brother site, link is
http://welcome.solutions.brother.com/BSC/public/files/dlf/doch000061/xr52c65txl64526562ug01enesfr.pdf

There are lots of weights of silk fabric but I'll assume you are working with something soft and silky like a silk charmeusse or silk georgette.

You need to stitch seams with a straight stitch and use a new sharp needle size 70 or even 60. Change the needle every 4-6 sewing hours or if you hear squeaking or popping; throw away the blunt one.

Use a quality polyester thread like Guttermann, Mettler, or Metryosene. Start with stitch length on 2.5 and stitch width zero (straight stitch). The normal metal presser foot is probably best for this. If the fabric is see through you may wish to do french seams to encase the raw edges. This is where you sew wrong sides together, then turn and stitch right sides together, if you have never done this instructions are here http://sewing.about.com/od/techniques/ss/frenchseam.htm.

Also pay carefull attention to your bobbin winding, my tip for this is here
http://www.fixya.com/support/r10598580-winding_bobbin_correctly
as winding the bobbin smoothly and evenly is essential to quality stitched seams.

Always press every seam as you sew, dry iron, silk setting. Press each side of the seam, then press the seam allowances open, this sets the stitches into the fabric.

If you find that the seam is pulling up you can try loosing off the top tension by a half number (turn it down to loosen) and shorten up the stitch length a fraction to 2.2 or so. But you don't want it too small as if you need to "unsew" ie unpick, you'll never see the thread.

Use a lighweight interfacing if the pattern requires it; I'd use a fusible but very lightweight such as Pellon Featherweight.

Happy sewing.

Sep 02, 2011 | Brother VX808 Sewing machine

1 Answer

I have a singer 7258 that I can not get the tension to loosen up on. The top stitch is straight across and adjusting dial doesn't help.


Hello

Adjust the tension

Load your sewing machine with one color on top, threaded through the needle. Load the second color thread into the bobbin and thread.


Fold the scrap fabric in half, and sew a straight stitch at least 2 inches long. Look closely at the seam. If you see loops of the bottom color thread on top of the fabric, proceed to Step 3. If you see loops of the top color thread on the bottom of the fabric, proceed to step 4.


Loosen the top tension. Since the top tension is so tight, it is pulling the bottom thread up through the fabric. Loosen the top tension by turning the numbered knob on the front of the sewing machine counterclockwise by one number.


Tighten the top tension. Since the top tension is too loose, the bottom thread is pulling the top thread down through the fabric. Tighten the top tension by turning the numbered knob on the front of the sewing machine clockwise by one number.


Sew a straight stitch 3 inches in length. Check the stitching. It is perfect if the threads meet in the middle, and you can only see the top thread on top and the bottom thread on bottom. If it still needs adjusting, go back to step 2 to repeat the needed steps.


Using two different colored threads makes it easier for you to see which thread is being pulled.

Always use proper precautions when working with electrical machines.

Aug 01, 2011 | Singer Sewing Machines

2 Answers

How to sew Shell Tuck Stitch.


I can't find an image clear enough to actually see the stitch selection on the front of this machine.

Does it have a stitch that looks like three or 4 straight stitches, then one zig zag, then more straight stitches? This is the stitch you want to select to do a shell tuck.

Then hold your fabric with right side up and turn edge under about 8mm and seam along the edge using this stich so that the zig zag stitch goes over the folded edge each time to the right. This should pull in the folded edge a little giving a scalloped edge.

Just do a couple of trials to work out the best position for the folded edge on the needle plate to get the effect right, probably just the edge of the normal straight stitch but it varies for each machine. If your machine does this stitch with a variable adjustment on the width of the zig zag part, then you could finesse it with this too.

May 23, 2011 | Brother LS-2125 Mechanical Sewing Machine

1 Answer

I have the huskylock 905 and it is running great--but-- the seam easily spreads apart after sewing. I have adjusted all of the tensions in different areas and it looks great until you hold the fabric and...


The left needle thread tension is the problem if the seam can be pulled open. Check the threading and tension on this needle, you may find that the stitch looks okay on the top but on the underside the left needle thread is actually lying against the right needle stitching.

Check the left needle tension device is working, clean it according to the manual instructions, rethread and ensure it is set to the normal number (probably 5), then test again and see if its still happening. If so the tension device is probably faulting and will need a service.

Reading your description again, if the whole seam is pulling apart fully, then all the tensions are too loose. Either way, I'd take it to the Husqvarna dealer for a service, all machines benefit from one at least every 2 years.

May 05, 2011 | Husqvarna Huskylock Computerized 905

1 Answer

Top seam normal but bottom one appears just straight and loose.


If the top thread looks normal and the bottom thread "loops", it means that the top thread does not have tension. Take out all the thread and re-thread the path, giving special attention to the path of the thread through the tension disks.
Thread the machine with the sewing foot up, it opens up the tension disks, and make sure you lower the foot before sewing.
This will close the tension disks.

Jun 22, 2009 | Janome L-344 Mechanical Sewing Machine

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