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My bobbin tension is really loose. how do I adjust the bobbin tension?

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  • Brother Master
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The bobbin case screw---to the left tightens----to the right loosens

Posted on Sep 28, 2010

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Straight stitch. Top is fine loose on bottomadjusting top tension does not help how to adjust bottom tension?


Usually, if there are loose threads under the fabric, it is the top thread that is too loose. Check your sewing sample closely--you can even test with two different color threads to help distinguish which thread is which. Loose top thread will generally be pulled DOWN and show under the fabric. Loose bobbin thread will be pulled UP and show on the top of the fabric. The ideal tension is when both threads MEET in the middle of the fabric.

First, remove the thread from the machine. Install a brand new needle. Always Raise the Presser Foot and thread the upper thread, making certain the thread path is correct.

Check that the bobbin thread is threaded correctly and turning the proper direction in the bobbin case.

Set the upper tension to the midway point and sew a retest. A tweaking of upper tension may be necessary to get it where it should be. Generally, upper tension should make the majority of adjustments needed for tension correction. Bobbin tension is one of the last tension adjustments to make as it is very sensitive and can go awry very quickly.

If, in fact, the bobbin tension is off, the tension skrew on the bobbin case is where the adjustment is made. Before making any bobbin tension adjustments, mark where the skrew slot is located on the bobbin case with a permanent marker. This will allow you to reverse your changes if necessary. Be CAREFUL as TINY changes make HUGE differences in tension. Make only 1/8th turn adjustment, then retest before making another adjustment.

Remember that tension testing and readjustment are a necessity when sewing. The same tension that will work with light weight thread and fine fabric will most likely not work when using heavy thread on drapery fabric. Get comfortable with making tension adjustments to get the ideal tension for each project.

Understanding Thread Tension Threads

Oh You Crafty Gal Sewing Lesson 10 How to Fix Tension on Your Sewing...

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&ved=0ahUKEwilg-3t2vHMAhVJDlIKHXnsBWYQFgheMA0&url=http%3A%2F%2Fwww.ca.uky.edu%2FHES%2Ffcs%2FFACTSHTS%2FCT-MMB-213.pdf&usg=AFQjCNE4QlGk1Fvt8K2UGCRCfzMpGS-A2Q&cad=rja

How to Adjust the Tension on Sewing Machine

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May 24, 2016 | Sewing Machines

1 Answer

I am trying the tention,, and topt is fine,,under neat is loose


try adjusting the top tension

make sure the needle can be used for sewing fleece

try rethreading the machine ,make sure each thread guide is used

if you try changing the top tension & the machine doesn't respond to any tension setting then maybe the tension dial needs to be replaced

make sure the bobbin is inserted correctly in the bobbin case

make sure the bobbin is wound correctly

clean under the needle plate & in bobbin area for lint or loose threads

Apr 01, 2012 | Brother Sewing Machines

3 Answers

Tension of pe770


Besides the other advice here, check your bobbin case. At first I didn't get my thread hooked into the bobbin case properly and had problems that looked like the bobbin tension was not adjusted properly. I have to take the case out, put in the bobbin to make sure it's caught properly and then put it back into the machine. This is what worked for me.

Mar 14, 2012 | Brother PE770 Computerized Sewing Machine

2 Answers

Bottom tension is too loose


You really need a proper set of weights and test spindle to adjust the bobbin tension, however if the bobbin tension is genuinely too loose, you can adjust it by turning the tension screw clockwise - this is the larger of the two screws on the side that are attached to the spring under-which the thread goes when it comes off the bobbin. You only need to turn the screw a little bit to make a big difference to tension, so dont overdo it.

Jan 27, 2012 | Bernina Artista 180

3 Answers

I need to know how to adjust the bobbin tension on my euro-prox sewing machine.


There is a tiny screw on the side of the bobbin case.

Mark the **** (in the screw head) position on the bobbin case with tiny dab of nail polish so you will know where the original setting was.

Left/loose and right/tight.

If you are adjusting because the bottom stitching is loose/loopy, first try threading the machine with the presser foot up to see if this solves the problem.

May 01, 2010 | Euro-Pro Shark 60 - 384

1 Answer

I have a 7570 and cannot get the tension the bottom thread is loose and can be pulled right thru I checked the top and adjusted the bottom and nothing seems to change.


When you thread your bobbin in the bobbin case, hold it only by the thread. If the bobbin and bobbin case fall, the tension is too loose. If this is the case, turn the bobbin tension screw 1/4 turn until the bobbin and bobbin case do not fall when only holding by the thread. The top tension should be set between 4 and 5. The best way to see which one needs to be adjusted is to do a zigzag. If the thread is pulling more on top and your top tension is set between 4 and 5, the bobbin tension is too loose. If your top tension is set between 4 and 5 and it's pulling on the bottom, the bottom is too tight.

Feb 17, 2010 | PfaFF Creative 7570

1 Answer

Pfaff varimatic 6091 sew a rag quilt with jean and flannel,I can't get my tension right it seems to be funny on the bottom stitch,where shoulf the top tension be set at 4 1/2 ,when do I adjust the bobbin...


Hi! The bobbin tension rarely needs to be adjusted. First, make sure you're using the appropriate size needle and thread for your fabric (I'd probably use either a 'denim' needle or a universal size 14) and also that the upper thread and bobbin are threaded absolutely correctly. These can throw off the tension! Also, take the time to clean out the bobbin area. That can throw your stitch off also.

If the stitch on the bottom is loose, so that you see the top threads, then the top tension is too loose. If the top stitch is too loose and you see the bobbin threads on top, then the top tension is too tight.

It helps to thread the machine with different color thread on top and in the bobbin, and then stitch an inch or so on the same type of fabric as you're using in your quilt. Check the stitch. If you need to adjust the top tension, make sure the pressure foot is down! Adjust a little, stitch a few inches, and check again. Repeat until you don't see any (or very little) bobbin thread on the top or top thread on the bottom.

If you go through all these steps, and the bobbin thread is still loose (and you've tightened up the top tension), then there is a tiny little screw on the side of the bobbin case that you can use to adjust the bobbin tension. Turn the screw just a little bit (less than a quarter turn), stitch, check, etc. Once the bobbin tension is set, you shouldn't ever have to change it.

Let me know if this helps, ok?

Happy sewing!




Feb 10, 2010 | PfaFF Sewing Machines

1 Answer

The top thread is really loopy on the underside of the fabric, sometimes it misses a stitch, sometimes, the upper thread breaks, and it often gets so tangled underneath that the machine won't feed.


Your tension is way too loose on top or too tight on the bobbin. Try adjusting the top tension one number at a time until you get it right. (Only adjust the bobbin tension as a last resort). Also you could have different thickness of thread in the bobbin than on the top or are sewing a very heavy fabric. Try adjusting the tension with same thread in both bobbin and top and use a normal weight fabric until you find the right tension to get you back to a normal stitch before going to a heavier fabric or thread.

Nov 19, 2009 | Craft Master 4300 Mechanical Sewing...

1 Answer

Bobbin on 12102 kenmore


Welcome to FixYa!

Don't mess with the bobbin! They rarely need adjustment. Sloppy bottom stitches usually come from two things. Tension too loose on the tension dial or improper threading.

Dial tension should be set on about the mid range and you must, must, must, make sure that you have the machine in the proper thread patch. Have someone check it with you. Sometimes a fresh set of eyes will help you spot an area that you missed.

Thanks and if you found my solution helpful, please reward me with a FixYa rating.

Sep 26, 2008 | Kenmore 12102

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