A Brother solution? This is for the Brother machine sewers! My Quatro 3 was doing some terrible stitching - the top looked too loose and the bottom was just a straight thread that could be just ripped out with my fingers. So... I took it to the shop. The tech there told me that when that happens to First take out the needle plate, and the plastic needle plate that goes with it, along with the bobbin case. Second, install just the needle plate, tightening the screws. Third, place the bobbin case under the needle plate, Finally replace the plastic part of the needle plate. She said the height of the bobbin case can be the problem! Hopefully this helps some of you other Brother people!
1. Red bobbin is for my Brother Quattro and the white one is for Husqvarna
I was told to use janome needles in my brother this has made a big difference to thread break. The brother machines have 2 tensions while janome have 1 miss one of these and your design ends up like you describe. maybe the tensions are out ? OR the bobbin is running the wrong way which I have done too and ended up with what you describe.
Turn off machine and reload design and new bobbin I have had to float extra stabilizer under at times too. Hope this helps
Ash
You must put the needle plate on first, then the bobbin case and then the bobbin cover....It cost me $200 to get my machine fixed.....It won't happen again!