THORLABS K-Cube Piezo Controller User Manual page 52

Chapter 6
used for closed loop control but in this case the KSG101 MONITOR output must
be connected to the KPZ101 EXT IN input using an external SMA to SMA cable.
As mentioned in the previous section, the function of the analogue input
source depends on whether the cube is used in open or closed loop
mode. In open loop mode, the input selected here will be added to the
Drive Input Source if the 'External Input' is enabled in this panel. In closed
loop mode, the input selected here expects to see the feedback input
.
Channel 2
Bay 1
Channel 1
Input Settings
Input Source - the voltage output of the unit is a sum of up to 3 contributing sources:
the software (GUI) 'Output Voltage' setting, the front panel potentiometer and the
external input source, which in turn can be set to Hub Channel 1, Hub Channel 2 or
'EXT IN' SMA connector - see Analogue Input Source parameter.
Of these 3 contributing sources, software control is always on (since whenever the
GUI panel is displayed, the software is controlling the piezo cube), whilst the
contribution of the front panel pot and the external input can be individually enabled
or disabled as follows:
If Software only is selected, the unit responds only to software inputs and the
HV amp output is that set using the SetVoltOutput method (or the GUI panel
'Output' control).
If Software + External Signal is selected, the unit sums the signal on the rear
panel 'EXT IN' SMC connector with the voltage set using the SetVoltOutput
method (or the GUI panel 'Output' control).
If Software + Wheel is selected, the unit sums the voltage set using the top
panel joystick wheel with the voltage set using the SetVoltOutput method (or
the GUI panel 'Output' control).
52
Note
from the external position reader.
Channel 2
Bay 2 Bay 3
Fig. 6.3 Controller Hub Feedback Channels
Channel 2
Bay 4 Bay 5
HA0365T Rev Dk Jan 2017
Bay 6