Saturday, August 29, 2009
Weaving 101: Checking Pattern
The last part of the pattern set up is called the "Tie Up" (not to be confused with tying on). The tie up is diagrammed in your weaving pattern, it's the little square box with X's in the corner (see previous post). It tells you which shaft of heddles to attach to which pedal, or treadle (tred-le). This picture shows the treadles. The white strings coming down are detachable and you use these to determine which treadle will operate which combination of heddle shafts. All that means is: it makes your pattern come out.
When you push on a treadle with your foot (these are under the loom by the way), it raises whatever heddle shafts you've attached to it. So if you were just doing regular plain weave (over-under-over-under), you would only need 2 treadles: one to raise half of the threads, the other to raise the other half. I'm doing a twill, so I have the 2 left ones for plain weave and the 4 right ones for the twill pattern.
This is what happens when I press a treadle: half of the threads are raised and the other half stay down. This side view shows what's called the shed, it's a nice open space for your weft thread to go through.
Checking the pattern is important incase you have a threading error. I had one thread out of place that I had to fix (I'll spare you the details). This picture shows a close-up with my weft thread after 2 passes through the shed. It's just plain weave and should be the over-under pattern.