Sunday, September 4, 2011

Lace Shawl

I have threaded the loom  [AVL WDL] with my Ultimate Threading and the first cab of the rank is a lace shawl. The yarn is Bendigo 2 ply set at 13.5 epi and all is going well. Shaft 24 has finally given up the ghost [the wire from the shaft to the dobby is kinked and will not engage consistently with the electromagnet) but it was no matter as I was just using the shaft for the selvedge so I was able to switch to another one.



I am using live weight tension on the warp beam at the back of the loom. I have kept  the AVL brake cord, I have just detached it from the loom frame and attached 10lbs as the main weight and  x2 1lb sinker as the counter weight.

   

 Because I have had problems with the ratchet and pawl on the front sandpaper beam I have put on a similar live weight tension system at the front of the loom which pulls in the opposite direction. I adjust the weights so that the warp can be advanced with the lightest of touches on the ratchet leaver. In practise this means that I advance the warp much more often than I used to.

Before stumbling on this system I advanced the warp whenever I moved the temple, about every 2". Now I move it forward about every half inch - there are no ratchets engaged or disengaged in the process so everything is very smooth. Too much weight and the warp will advance just from the pressure of the beater; I tried this as a means of advancing the warp but I could not get a consistent beat. The front beam has 2 lbs pulling the warp forward - I suppose the difference needed is due to the friction of the yarn on the back beam heddles and reed.

The diagram shows the principal

1 comment:

Comments are most welcome