What can be used to control stress? When I stand with materials, the force of the cylinder is large, and when there is no material, the force is small. A proportional valve can be realized.

Proportional valve can be controlled, and can also be realized by ordinary cylinders:

1, adopts a table-controlled TPC4-4TD controller, and uses two outputs to control two gas paths with different pressures respectively.

2. The input end of the instrument control is connected with the induction switch, and the induction switch controls the action of the high-pressure pneumatic solenoid valve when the material is sensed.

Please refer to the following figure for wiring:

You can refer to the wiring in the above figure, and the two output terminals respectively control the work of two solenoid valves with different gas paths.