Interaction between a spring-loaded mass system (e.g. cylinder + oil column + load) and the pressurisation at very low sliding speeds (Figure S 94).
The stiction of the system –– which is primarily determined by the seals used — is a determining variable. The smaller it is, the smaller the velocity, at which it can still run smoothly. As the friction also depends on the pressure, that too is an influencing factor: the higher it is, the greater the stiction and sliding friction.
Therefore, to lower the limit to the stick slip, seals with very low friction are chosen before reaching the hydrostatic piston bearing (e.g. in the case of servo cylinders).
Figure S 94: Stick slip; effect on the path and differential pressure on a pneumatic seal