Here's a great tip if your machine is having trouble with certain threads.
Some threads don't like the way your sew machine or embroidery machine loads the thread because of the way the thread is wound from the manufacturer. I use a child's sippy cup to remedy this fact. As you can see from the photo, you simply place the thread inside the cup, pull the end thru the lid & screw the lid on. Now you can thread your machine the way your usually do.
I hope this tip helps those who are having trouble with threads.