Originally Posted by mynani
I have been ising my Pfaff 2140 embroidery machine daily with no problem. Today I tried to use it and have big loops under the material. I have put on a new needle, cleaned the bobbin area. What is the problem caused by? Thanks, I am trying to make things for a craft sale and this has brought me to a grinding halt.
99 times out of a 100, it's the top thread not being threaded right or possibly a small portion of thread broke off & lodged somewhere in the top where the takeup lever is. unscrew the side and open it up and have a look in there. just remember this, if the mess is on the bottom of fabric, then the top thread is the culprit and vice versa. the top tension usually never has to be adjusted. and for sure never bother the bobbin tension.