See pictures in album PR3 Remedying Work.
Today we did preparation to be able to tighten the piano wires locating clamps tomorrow. As part of the procedure we will lift the RM in order to reduce the tension in the tungsten wire and we need to take the necessary precautions:
- We removed the coil bodies from the recoil mass in order to protect the magnets standoffs when we lift the RM. We placed them on the table in trays with names. See this picture of the RM without the coils.
- At the sides of the RM we placed spacers in between the clamped tunsten wire and RM just below the wire breakers. See this picture (-Y side) and this other one (+Y side). The aim is to keep the wire underneath the RM from moving when the tension in the wire decreases when the RM is slightly lifted. After testing various types of spacers we used the tips of PEEK cable ties 0.9 mm thick. Judging from how much force it required to put them in between the RM surface and the wires, they do apply a useful amount of pressure on the wires and will likely keep them in place.