Technical documentation
Technical documentation
Technical documentation
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General description<br />
W.E.ST. Elektronik GmbH<br />
This electronic module is developed for controlling of hydraulic positioning drives. A typical signal accuracy<br />
of app. 0,01% of the sensor stroke can be achieved. The sampling time of the control loop is 1ms.<br />
Proportional valves with integrated electronics or external power amplifiers can be controlled by the analogue<br />
differential output (or by the 4… 20 mA current output). Additionally an integrated power amplifier<br />
for best performance is available.<br />
Internal profile generation (acceleration time, max. velocity and stroke depended deceleration) provides<br />
fast and excellent positioning. Two modes can be selected.<br />
Stroke depended deceleration: The axis drives in open loop mode and is switched over in closed loop<br />
during deceleration. This is a time-optimal positioning structure with very high stability. The maximal velocity<br />
can be limited by the external velocity input.<br />
NC mode: An integrated NC profile generator (VMODE command) can be activated. The position profile<br />
is internally generated with defined speed and the axis is following (controlled by the following error) the<br />
command position with the same speed.<br />
Internal functions, InPos, out of stroke and sensor or command failure are monitored by the two digital<br />
outputs: ready and status.<br />
The adjustment via RS232C is simple and easy to understand. A standard terminal program or our special<br />
windows application software (WPC-300, download from our homepage) can be used.<br />
Typical applications: positioning drives, handling axis and fast transportable drives (adaptation of nonlinear<br />
valve characteristics).<br />
Features<br />
• Extern definable target positions<br />
• High speed positioning mode<br />
• Principle of stroke depended deceleration or NC controlled movement<br />
(speed controlled)<br />
• Optimal use of overlapped and zero overlapped proportional valves<br />
• Internal profile, defined by acceleration time, max velocity and deceleration<br />
stroke<br />
• Extern definable velocities<br />
• Simple and application orientated parameter settings<br />
• Failure monitoring<br />
• Adjustments via RS232C interface<br />
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