So I am putting a snowflake pattern around the border of a large quilt. The top is absolutely stunning - nice contrast between the blue/black border and the light yellow thread with just the very odd indication that the thread on the back is black. The back, however, is just short of a disaster. Little yellow dots, sometimes every stitch, sometimes just once in a while, sometimes not at all.
I have done everything I can think of to ensure that the tension is correct and constant:
- the needle is seated properly and straight (and new).
- the machine is threaded properly and the tension mechanism is clean.
- the bobbin is threaded correctly and the tension set so that it stands up but does not lift off my hand.
- the top tension is such that with only about an 8th of a turn tighter, I get black thread pulling through to the top.
I am prepared to blame the top thread - a polyester (as is the thread on the back) - but that does not sit well with me. I certainly cannot confirm that the thread is inconsistent in thickness causing the changes in tension (but it is the only logical explanation that I can come up with).
Clearly I am missing something.
Still new at this.