Scraping seal
seal with rounded sealing edge with a scraper (Figure D 11) . Often an angled metal ring is vulcanised into the seal to improve the seating of the ring. In this way it can be secured axially with the aid
Directional valve, 3-way valves
In general : Valve with three controlled ports. For directional valves : Valve with inlet, cylinder line, outlet (suitable to control a single action cylinder).
Measuring converter
Measuring instrument which converts an input signal with a specific structure into an with a modified structure. Example: A/D converter or code translator .
Modular control
Control system with a modular structure in terms of hardware and software, making it more easily adaptable to variable conditions. Opposite: control with a rigid structure.
Multi-stroke hydrostatic motor
— with one exception — are radial piston units fitted with a stroke ring designed accordingly ( Figure M 8 ). [...] A group with the category of slow speed high torque motors which achieves its high torque by having each displacement unit perform several strokes (between four and eight or so) per revolution. These —
Hydrostatics
Branch of hydraulics . Concerned with the generation and transmission of energy and signals via the static pressure associated with a fluid. This is why, compared with hydrokinetics , the pressure ranges
Velocity feedback loop
y on drives with electrical servomotors. The velocity feedback loop does not provide any advantage on hydraulic drives with low damping D H, but is advantageous if it is used together with acceleration
Absolute filtration rating
states that, e.g., with a 10-μm absolute filter no glass beads with a 10-μm diameter are allowed to pass through the filter. The expression should therefore only be used in conjunction with the glass bead
DC measuring amplifier
transducer with a supply voltage. This voltage is changed by the load on the sensor and supplied to the input stage on the amplifier. This signal is amplified there into a low noise output signal with minimised [...] minimised zero point drift. Alternative: measuring amplifier with carrier frequency
Program flowchart
possible paths associated with a program execution sequence (DIN 44 300). The program flowchart makes it possible therefore to provide an overview of the control sequence for a system with all the signal and [...] and control functions and regardless of the technology associated with the devices. Graphical representation is defined in DIN 66 001.