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Bernina virtuosa 155

Hi ive been having some problems with my machine, it has started sounding like its chugging and the bobbin sounds like its rattling a bit. i had this problem before and opened up the top and tightened some kind of arm holding the tension and oiled the bobbin area. it seemed to work again and hardly made a sound. but i have had to oil it several times each time i use it for that noise to go away and the stitches be even but now it is happening again, the stitches bunch up underneath and it sounds really bad! i live on a remote island and nobody here has heard of bernina i dont think so i have to do all repairs myself!please help!

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  • m0llid0lli Feb 10, 2008

    i dont know what was wrong with it because i checked everything you said and it was fine but when i did the test sew the stitching was perfect and no more rattling thanks a lot this was a big help!

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G'day.
Firstly, dont flood it with oil - it will end up making a mess for you!
What I'm going to tell you is basic, but work thru it.
1. take out the bobbin case and swing the two latcjes to the side so you can remove the hook. Inspect the point VERY closely. should be sharp and absolutely smooth. ANY burr or nick MUST be removed. (have you broken a needle recently??)
2. Lay the mahine on its back, refit the hook and lock into place. Put in a BRAND NEW needle With the bobbin case still removed and the machine turned ON and in MAXIMUM Zig Zag width, turn the hand wheel in the direction it normally rotates - towards you. When the needle swings to the Left and is on its wasy UP, the hook point must pass behind the needle a little before the eye of the needle reaches the arc that the hook point travels thru. Same on the Right swing. If it does, GOOD.
3. Wind an empty bobbin with GOOD QUALITY THREAD. It should wind on reasonably even and TIGHT. When you push your fingernail into the thread it must NOT be spungy. Insert bobbin into bobbin case (IN THE CORRECT DIRECTION). Hold the tail of the thread and allow bobbin case to dangle, it should not drop down until you give the thread a little jerk. It should drop a little then stop. Insert bobbin case into machine, thread top of machine CORRECTLY. Set top tention to normal, test sew.
Let me know how this goes.

Posted on Feb 07, 2008

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Posted on Jan 02, 2017

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