Without it, Betsy and I would be pretty useless.
And by yarn, yes, I mean those balls of wool your mum or nana knit with. Except here’s the thing… it’s might not actually be wool which is why we call it yarn instead. It could be made from any type of fiber like acrylic or cotton or bamboo or yes, wool.
Just like the yarn that they use when knitting with two handheld needles, machine yarn comes in all varieties of fibers. What makes it slightly different is that machine yarn is generally a lighter weight or thinner yarn and is comes in larger quantities on cones rather than balls.
The cones make it easier for the yarn to be pulled off evenly without everything getting tangled. Betsy has a vertical yarn feeder that brings the yarn from the floor behind the machine up over the top via various hooks and eyes. This threading system allows you to adjust the tension of the yarn as it feeds into the machine.