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K-Cube Piezo Driver
4.4.4 Menu Option - Feedback mode
When the K-Cube Piezo Driver is used in conjunction with
the K-Cube Strain Gauge Reader unit (KSG101), high
precision closed loop operation is po ssible using the
complete range of feedback equipped piezo actuators
available from T horlabs - see Section 5.3.1. fo r
schematic diagrams of open and closed loop operation.
This mode is used to set the feedback mode.
Press the MENU bu tton, then use the wheel to scroll
through the menu options.
Press the MENU button to enter the 3 Feedback mode
option.
The display shows the current setting.
Use the wheel to change to the required mode, e.g. Loop
closed.
Note
.
This setting cannot be saved (persisted), i.e. at
subsequent power-up cycles the unit always defaults to
open loop mode.
Caution.
If the Piezo Driver is switch to closed loop mode
without being connected to a Strain Gauge Reader, the
piezo driver will expect a feedback signal and the piezo
drive voltage will ramp up to the maximum limit, either
75V or 150V, whichever is set in software (see Section
6.2.). The 100V limit is only a software setting and in this
case, the output will still ramp to 150V.
Press the MENU button to save the setting and return to
the operating screen.
The selected mode is indicated on the lower line of the
display as follows:
Open loop mode
Closed loop mode
Note that in closed loop, the display shows position as a
percentage of the piezo travel range.
M e n u o p t i o n s
3 F e e d b a c k m o d e
M e n u o p t i o n s
U s e w h e e l
MENU
L o o p o p e n e d
t o c h a n g e
V o l t a g e : 0 . 0 0 V
1 5 0 V N V
L o o p c l o s e d
t o c h a n g e
P o s i t i o n : 0 . 0 0 %
1 5 0 V N V
