Bleed valve (Hy), exhaust valve (PN)
hydraulic fluid in a hydraulic system . The valve must be fitted at the highest point in the system and can trigger automatically or be operated manually.
Proximity switch
Switch which switches when an object is approached or left. Either inductive devices which can trigger at distances of up to 25 m are used for this purpose, or capacitive devices effective at distances
Program module
General : A part of a program which can be delimited in terms of its allotted task or structure. A control : Consequence associated with control instructions for a self-contained application-based function
Load stiffness
as possible under an external load. Load stiffness for linear drives is mostly stated in N / μm. It can be compared with spring stiffness.
Coil impedance
impedance is a function of the frequency of the signal amplitude and other operating conditions, but it can be estimated using the Ohmic resistance and the coil inductance.
Energy losses in hydraulics
housing. On systems without appreciable throttling approx. 15 % can be expected on average, while in throttle circuits the loss element can be 25 to 30 % and higher.
Releasable check valve
Check valve that can also be opened against the locking direction if required. This action occurs via a control piston (K 2) that is dimensioned so that it can open the valve cone against the system pressure
Pressure valve
signal pressure. Depending on the design a differentiation is made between seated valves and that can be directly or pilot-controlled . In relation to the function a differentiation is made between pr [...] suction stroke of the piston. During the pressure stroke the pressure valve opens such that the piston can press the geometric displacement into the circuit.
Dissipated heat
losses, losses caused by throttle processes of local resistances in the system. The dissipated heat can be estimated for finished systems by measuring the change in temperature over several hours. The start [...] the oil volume are used to calculate the hourly heat flow. A rough estimate of the dissipated heat can be achieved by taking an average of the overall efficiency if there is no appreciable throttle: and
Programming methods
Describes the methodical and systematic approach to generating programs . A distinction can be made between direct and indirect programming methods ( Figure P 17 ): In addition to manual programming, which [...] programming) tend to use problem-oriented languages. In order to describe the sequence, the geometry can be input via the keyboard or CAD systems may be used for geometry modelling purposes. When creating