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Topic: tension issues - new brother PE 770  (Read 2479 times)
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leighi123
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« on: March 19, 2013 08:16:07 AM »

I have a Brother PE770, I got it in January, so its pretty new. I was doing a bunch of applique designs, and did 5/6 of them, and noticed that each one I did, then tension got a little more off. By #6, it was a huge mess!

The upper thread is super loose, its loopy on the top, and on the back, no bobbin thread shows at all, its just like 1 piece of thread going through all the back and forth of the upper thread. So on the back, all you see is loose, sometimes tangled, upper thread. Its eating through tones of thread.


I tried:
- new needle
- cleaning everything including in-between the tension disks
- changing the upper tension everywhere from -8 to +8, the whole range it can go.
- tried a few different designs
- different thread
- removing bobbin and casing, cleaning everything (there was no fuzz) and putting it all back
- adjusting the screw slightly on the bobbin casing
- different hoops
- leaving it overnight to see if it would magically fix itself in the night
- and finally, yelling at it.

Nothing made any difference at all.

Now what???

The nearest "Brother authorized" dealer is 2 hours away, and this thing is basically brand new. And I need to finish this outfit by friday!
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marypoppins
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« Reply #1 on: March 26, 2013 12:33:16 PM »

I don't know if it will help much or not but I find that it makes a difference when I am putting the bobbin in to hold it down with one finger while threading the thread through. 
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Pegobrien61
« Reply #2 on: October 05, 2013 12:02:23 PM »

Did you solve this? Mine is doing the same thing. It got a lot better after I ran some unwaxed dental floss through it, but still not right. Also it does well if you pinch the thread slightly as it comes off the spool. Not a preferred solution.  Tongue
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gravel10
« Reply #3 on: November 15, 2013 07:46:08 AM »

I have a Brother 1250D and it also does that,  It works fine for a few projects then it eats my fabric when it sucks my top thread in to the bobbin case and gets all messed up.   My closest brother dealer is over and hour away too.  Sad  getting so mad then sad at my machine which I truly love to play with
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« Reply #4 on: December 10, 2013 04:09:12 PM »

In searching online I found  couple of ideas that may help with this:

Quote
There is a screw on side of bobbin case that you turn. If you look on page 68 of your manual it walks you through adjusting tension. There are 2 screws you want to adjust the flat head screw NOT the Phillips head screw. Turning clockwise tightens counter clockwise loosens.


Quote
Check your bobbin case. To make sure the thread hooked into the bobbin case properly. Take the case out, put in the bobbin to make sure it's caught properly and then put it back into the machine.

Quote
Check that the bobbin tension is adjusted correctly by taking out the bobbin complete with the spool. Pull the cotton thread and it should be a smooth light pressure if the tension is correct. If it is tight to pull or pulls freely then adjust the tension screw which is found on the outside of the bobbin. The screw is very small and requires a miniature size screwdriver. The adjustment will only be a slight turn of the screw one way or the other to obtain the correct tension(depending if it was loose or tight). Once this is set reinstall the bobbin and tread up the machine, hopefully with the upper tension set at approx."2" the machine will sew correctly.

Hope these help someone  Smiley
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