Help with Juki DX7
While piecing, every now and then my tension will suddenly play up giving me lousy tension (needle thread lying along the fabric and the underside stitches waaay too loose). If I remove my bobbin and then put it back in place everything is fine again so I'm assuming it is something to do with the bobbin. If I don't remove and re-seat the bobbin the tension continues being horrid. It's happened with several bobbins (yes, they are Juki bobbins) which to my eye look properly wound and also several different spools of thread. Any ideas for me on what is going on?