Thanks, Glenn! I wasn't running the thread behind the winder and back up the front. Now I'm able to wind bobbins as smooth and tight as the green one in my photo. I love how the winder disengages when the bobbin is full.
This machine is a work of art and sews like a dream. I'll have to post more photos after the weekend when my company leaves and I have time to sew!
Thanks again to everyone's who took the time to answer.
Karen