By - toolgifs
why is the top-push-down-thingy raised alternatingly to an up-angle, then to a down-angle?
To raiser / lower the vertical strings in an alternating fashion, you know, weaving.
That is what creates the woven pattern as opposes to reeds just tucked loosely between strings.
There are two sets of strings on the loom. When at an upward angle, it brings even number string forwards and pushes the odd number strings backwards, creating a gap for the shuttle to insert the reed. At the downward angle, the strings are reversed, even back and odd forwards. So you have the opposite gap for the read, creating the woven pattern.
It’s called a loom.