Two-hand control
Control unit of a machine tool, which only issues an output signal if it is actuated with both hands simultaneously. Two-hand controls are mandatory for manually operated presses.
Pre-charged oil tank
If the oil in a system is intended to remain practically free from air (e.g. in aircraft hydraulics), the entire circuit must be placed under a slight excess pressure (approx. 0.3-0.4 bar). This happe
switching time
In general : The time between the input signal and the increase of the output signal to a given value, measured under certain conditions. Of a signal element : Time which passes after reaching a certa
Flow rate asymmetry
Only for continuously adjustable valves: Degree of deviation of the average flow rate signal transfer factors of the positive and negative signal range. It is determined using the difference of both a
Controller synthesis
Theoretical preliminary work for the construction of a controller. An analysis is performed of the dynamic of the system. Then a search is conducted to find a controller that can provide this data and
Contact pressure gauge
Standard pressure gauge with a spring-based elastic measuring element which features a spring contact in addition to the pointer with its electrical limit value indicators to ensure there is an upper
Flow rate amplification
States the percentage-based relationship between the electrical input signal and the hydraulic (here flow rate ) at zero load pressure in the range of the primarily linear characteristic (cf. transfer
Slider
Another term for the control piston (control spool) of a valve. The expression is also used for directional valves with valve control spools ().