On pulley side, surface interaction with the belt was measured at higher speed ranges using a thin flm pressure sensor coated on the pulley sheave and a stand-alone miniature data logger , even though the transmission ratio was limited to a constant.
The "P" and "S" areas in green and red in Figures 7 to 9 are where the belt element is in contact with the primary and secondary pulley sheaves, respectively.
This coupling also allows the hoist to be deployed with the drum positioned horizontally and the wire rope dropping directly off it, to avoid any noise generation from spooling over pulley sheaves
. Achieving sub-50dB(A) noise levels at 1m away, the product has proven popular in the industry, particularly with live shows.
The main operating points to understand are the correct matching of rope and block, and how leverage works with changes in the number of pulley sheaves
Essentially, the new V-element belt is an endless train of thin, trapezoid-shaped, metal plates, which are clamped in place with the axial force produced by hydraulic pressure on the pulley sheaves
. The elements transmit torque by pushing on each other while the bands stretch.