Getting the 40-shaft mechanical dobby going. Jim Ahrens built this loom in the 40’s. Beside the dobby shafts are 4 more made for a ground weave. You can see a small practice warp ready to see that the dobby mechanism works after replacing all the cords. A big project.
Here are the dobby bars I pegged for a design some years ago next to the mechanism. There is a single wide treadle to activate the dobby which is what makes the sheds. Next week we should see if all the adjustments and knots work like they should.
Here is a close up of the bars and pegs. Each bar represents one shed or row of weaving. The pegs tell the dooby which shafts to lift and lower to make the sheds.
The big pedal operates the dobby. The 4 regular pedals are meant to operate a ground weave which we aren’t using for our trial. Each press of the big pedal changes the shed (dobby bar with pegs).
For the trial only 4 shafts will be used.
Here are the completed 4 shafts with their individual weights at the bottom of each shaft. The cords for the remainder of the shafts are bunched up out of the way.