Elastic Parameter of Roller Head: 20kg/mm

Place the pressure sensor directly below the roller head. Lower the roller head in the direction perpendicular to the pressure sensor until the roller just touches the sensor (critical position), and the pressure gauge starts displaying a slight pressure.

Continue lowering the roller head 1mm in the direction perpendicular to the sensor; the pressure gauge reading is P1. Lower it another 1mm, and the reading is P2. Repeat lowering in 1mm increments, with the digital pressure readings being P3, P4, P5, P6… in sequence.

The pressure applied by the roller head per 1mm downward movement:Preload pressure of the roller head: P0 = P1 − ΔP