While I was researching which loom to get all the different terms were not that easy for me to visualize. Shed was one of those terms and it topped my confusing list. I knew that the shed was the space created by lowering and raising warp threads but the importance of a void wasn't clear to me.
The basics as I understand them now are that the larger the shed the less you need to wind your project as you weave. Before purchasing and using a loom I had no idea how much I would appreciate a larger shed. Initially the shed is larger and slowly shrinks as you weave so theoretically the larger the shed the faster you can weave.
However I like my Flip because the shed stays wide enough for me to get a shuttle though even when it shrinks to almost non-existent. I've seen quite a few complaints about the warp yarns staying together close to the heddle on some rigid heddles. Thankfully by some accident I managed to land myself a loom without that problem. Funny, all the research in the world and something overlooked makes me happy everytime I use the loom.
