The Spring 2 has 2 harnesses and 1 lam attached to the outside texsolv cord. This makes the weight differential imbalanced and without any other forces acting, harnesses have a tendency to drop.
Warp density and the type of yarn impact this expected behaviour and could prevent this harness and lam movement.
Regardless, when you step on a treadle, all tied up harnesses will move in the direction they are intended to. Those that are to be pulled down and have dropped on their own remain in place, but those that need to be raised do so.
Tie up cords that are loopy at rest should not impact performance.
Another consequence to this weigh imbalance is performance when only 2-4 shafts are used. The imbalance is exacerbated in this situation, thus the best course of action is to lock any un-used harnesses using the locking pin. Make sure you do not tie-up any locked harnesses as you will not be able to depress a treadle if you do tie up a locked harness.
See also Spring and Delta harnesses drop
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