With my Gammill, finally changed thread back to 40 tex to stop breaking thread. Doing fine now.

[QUOTE=roserips;6065596]I am trying out a Janome 1600p for quilting and can not figure out why the thread kept breaking...

Roserips, Did you solve the problem? I am currently looking at this machine and would love to know if you enjoy yours.

50wt 3 ply thread is a thick thread. That extra ply makes a big difference. And probably is the same thread is in the bobbin so that is 6 ply in the stitches moving fast when fmqing. More then likely a universal needle is being used so a size 90/14 or larger is the best choice for 50wt 3 ply thread if the thread is linty with slubs.