Help with PE 770??
 

My beautiful machine is sewing screwy. Awful loops on the bottom of my work. And building up in the bobbin area. I have cleaned it, changed bobbins and thread types, changed needles, different stabilizers, everything i can think of. Checked the settings on my sisters machine and made sure mine matched. Still looping bad on bottom. It was sewing fine and then started this in the middle of a design. Its not the design, stitched it fine on my sisters. Tried different designs on mine and still awful loops. What happened? Is it going to have to see the doc? Not sure I can go that long without it!!

Be sure thread is thru tenison dics correctly, check upper tension, make sure bobbin in correctly.

yes, rethreaded several times. bobbin and upper, changed threads, needle, bobbins. i'm stumped.

Probably the bobbin. Took me almost a year to learn how to make the bobbin sit right. You need to press down on the bobbin while pulling on the thread thru the guides. You will feel some resistance when it is in it's happy place. I don't know any other way to describe it. Hope this helps.