Originally Posted by
selm
Small spools and cone threads are wound onto the spool/cone differently. the spools have to be horizontal in order for the thread to come off the spool correctly. I was taught this when I got my longarm. I have a Gammill.
I don't know what can/will happen if you try to pull thread off a spool vertically.
I have used the small spools of Glide on my Gammill and have not had a problem. I did not know I wasn't suppose to use the small ones. They may gave told me at my class but there was so much info, I may have missed this. Anyway, the Glide small spools were not a problem.