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Single-Channel Piezo Controller, 75 V to 150 V
In the case of actuators with position feedback, there are 4 modes of operation in total;
1) Open-loop, display voltage applied to actuator
2) Closed-loop, display position (microns) measured by sensor
3) Closed-loop, display voltage applied to actuator
4) Open-loop, display position (microns) measured by sensor
The controller unit can also be used to control a force sensor. This is achieved either
by calling the SetForceSenseParams method (see the APTServer Helpfile, accessed
via the F1 key) or by checking the Force Sensing box in the settings panel (see
Section 5.2.3.).
When checked, an 'F' is displayed next to the digital display on the GUI panel.
Fig. 5.3 GUI Display - Force Sensing Mode
The system defaults to 'Position' (Force) display mode and the digital display shows
the force detected by the sensor. The units of force are dependent upon the type of
force sensor used.
5.2.6 Detection of Range of Travel
In the case of actuators with position feedback, the Piezoelectric driver can detect the
range of travel of the actuator, since this information is programmed in the electronic
circuit inside the actuator.
It is possible to get the range of travel of the actuator from the application software by
calling the
GetMaxTravel
method –
see the APTServer Help File
(accessed via the
Windows ‘Start’ menu).
This feature is not present in actuators without position sensing.
Note
These options can be selected through the GUI ‘Settings’ panel or by calling the
SetVoltPosDispMode method from the application software.
