THORLABS Kinesis PFM450E, Руководство пользователя

Страница: 19 / 59

Rev E Mar 2022
Page 16
Chapter 3 Installation
EXT OUT (BNC connector) – Used to monitor the piezo actuator on an oscilloscope or
other device. The output can be set to monitor the piezo Drive Voltage, the Linearized
Position, or the Unprocessed Position, as set in the Output Signal parameter in the
settings panel - see Section 5.2.2., or in software by calling the appropriate message.
JOYSTICK - Provides connection for the MZF001 Joystick - see Section 4.9. and
Section A.4.
USER - This female 15-Pin D-type connector exposes a number of internal electrical
signals. For convenience, a number of logic inputs and outputs are included, thereby
eliminating the need for extra PC based IO hardware. Using the software, these user
programmable logic lines can be deployed in applications requiring control of external
devices such a relays, light sources and other auxilliary equipment - see Section A.2.
for further details.
RS232 – Provides connection for serial port communication - see Section A.3.
USB - USB port for system communications.
Caution
Before the input can be used, the Drive Input Source must be set to a BNC
(+SW) option in the Settings panel (see Section 5.2.2.) or in software by calling
the appropriate message.
When driving the piezo mount from an external source, the external signal is
added to the software input (GUI panel or SetVoltOP software method) and, if
connected and selected, the Joystick.
The max stepping frequency depends on the shape of the waveform. E.g. for a
staircase waveform with a step size up to 25 µm, the minimum period for each
step can be as small as the settling time, i.e. 25 ms or stepping frequency of 40
Hz. However it will take a few ms to capture an image. For large periodic
waveforms, e.g. over 200 µm peak to peak sine wave signal, the operational
frequency is recommended to be as follows:
Loads up to 150g - less than 25 Hz
Loads 150 g to 250 g - less than 20 Hz
Loads 250 g to 400 g - less than 15 Hz
Loads 400 g to 500 g - less than 10 Hz
Note
The USB cable length should be no more than 3 metres unless a powered USB hub
is being used.