PI P-726.1CD User manual

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
P-726.1CD
PIFOC High-Load Objective Scanner

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 2 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Contents
About this Document 3
Symbols and Typographic Conventions............................................................................................................... 3
Downloading Manuals......................................................................................................................................... 3
Safety 5
Intended Use ....................................................................................................................................................... 5
Safety Precautions............................................................................................................................................... 5
Product Description 7
Product View ....................................................................................................................................................... 7
Scope of Delivery................................................................................................................................................. 8
Suitable Controllers ............................................................................................................................................. 8
Accessories .......................................................................................................................................................... 8
Installation 9
Connecting the P-726 to a Protective Earth Conductor...................................................................................... 9
Affixing the P-726 to the Microscope.................................................................................................................. 9
Installing the Objective........................................................................................................................................ 9
Start-Up and Operation 10
Discharging the P-726 11
Maintenance 11
Cleaning the P-726............................................................................................................................................. 11
Customer Service 12
Technical Data 12
Specifications..................................................................................................................................................... 12
Maximum Ratings.............................................................................................................................................. 13
Ambient Conditions and Classifications ............................................................................................................ 14
Dimensions ........................................................................................................................................................ 15
Pin Assignment .................................................................................................................................................. 16
Old Equipment Disposal 17

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 3 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
About this Document
This manual contains information necessary for the intended use of the P-726.1CD.
It assumes that the reader has a fundamental understanding of basic servo systems as well as
motion control concepts and applicable safety procedures.
The latest versions of the user manuals are available for download (p. 3) on our website.
Symbols and Typographic Conventions
The following symbols and typographic conventions are used in this user manual:
CAUTION
Dangerous situation
If not avoided, the dangerous situation will result in minor injury.
Actions to take to avoid the situation.
NOTICE
Dangerous situation
If not avoided, the dangerous situation will result in damage to the equipment.
Actions to take to avoid the situation.
INFORMATION
Information for easier handling, tricks, tips, etc.
Downloading Manuals
INFORMATION
If a manual is missing or problems occur with downloading:
Contact our customer service department (p. 12).
INFORMATION
For products that are supplied with software (CD in the scope of delivery), access to the
manuals is protected by a password. Protected content is only displayed on the website after
entering the access data.
You need the product CD to get the access data.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 4 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
For products with CD: Get access data
1. Insert the product CD into the PC drive.
2. Switch to the Manuals directory on the CD.
3. In the Manuals directory, open the Release News (file including releasenews in the file
name).
4. Get the access data for downloading protected content in the "User login for software
download" section of the Release News. Possible methods for getting the access data:
−Link to a page for registering and requesting the access data
−User name and password is specified
5. If the access data needs to be requested via a registration page:
a) Follow the link in the Release News.
b) Enter the required information in the browser window.
c) Click Show login data in the browser window.
d) Note the user name and password shown in the browser window.
Downloading manuals
If you have requested access data for protected contents via a registration page (see above):
Click the links in the browser window to change to the content for your product and log
in using the access data that you received.
General procedure:
1. Open the website www.pi.ws.
2. If access to the manuals is protected by a password:
a) Click Login.
b) Log in with the user name and password.
3. Click Search.
4. Enter the product number up to the period (e.g., P-726) or the product family (e.g.,
PIFOC) into the search field.
5. Click Start search or press the Enter key.
6. Open the corresponding product detail page in the list of search results:
a) If necessary: Scroll down the list.
b) If necessary: Click Load more results at the bottom of the list.
c) Click the corresponding product in the list.
7. Click the Downloads tab.
The manuals are shown under Documentation.
8. Click the desired manual and save it to the hard disk of your PC or to a data storage
medium.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 5 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Safety
Intended Use
The P-726 is a laboratory device as defined by DIN EN 61010-1. It is intended to be used in
interior spaces and in an environment which is free of dirt, oil and lubricants.
Based on its design and realization, the P-726 is intended for positioning and shifting
microscope objectives on one axis.
The P-726 objective scanner can be mounted horizontally or vertically. The specifications refer
to a vertically mounted objective scanner.
The intended use of the P-726 is only possible in a completely assembled and connected state.
The P-726 must be operated with a suitable controller that is available from PI. The controller
must provide the required operating voltages. To ensure proper performance of the servo-
control system, the controller must also be able to read out and process the signals from the
position sensors.
The controller is not included in the scope of delivery of the P-726.
Safety Precautions
CAUTION
Dangerous voltage and residual charge on piezo actuators!
The P-726 is driven by piezo actuators. Temperature changes and compressive stresses can
induce charges in piezo actuators. After being disconnected from the electronics, piezo
actuators can also stay charged for several hours. Touching or short-circuiting the contacts in
the connector of the P-726 can lead to minor injuries from electric shock. In addition, the piezo
actuators can be destroyed by an abrupt contraction.
Do not open the P-726.
Discharge the piezo actuators before installation:
Connect the piezo actuator to the switched-off PI controller.
Do not pull out the connector from the electronics during operation.
For P-726 with D-sub connector:
Touching the contacts in the connector can lead to an electric shock (max. 120 V DC) and minor
injuries.
Do not touch the contacts in the connector.
Secure the connector of the piezo actuator with screws against being pulled out of the
controller.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 6 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
CAUTION
Risk of electric shock if the protective earth conductor is not connected!
If a protective earth conductor is not or not properly connected, dangerous touch voltages can
occur and there is a risk of electric shock. In the case of malfunction or failure of the system,
touching the P-726 can result in minor injuries.
Connect the P-726 to a protective earth conductor (p. 9) before start-up.
Do not remove the protective earth conductor during operation.
If the protective earth conductor has to be temporarily removed (e.g., for modifications),
reconnect the P-726 to the protective earth conductor before starting it up again.
NOTICE
Unsuitable cables!
Unsuitable cables can damage the electronics.
Only use cables from PI for connecting the P-726 to the electronics.
NOTICE
Destruction of the piezo actuator by electric flashovers!
The use of the P-726 in environments that increase the electrical conductivity can lead to the
destruction of the piezo actuator by electric flashovers. Electric flashovers can be caused by
moisture, high humidity, liquids and conductive materials such as metal dust. In addition,
electric flashovers can also occur in certain air pressure ranges due to the increased
conductivity of the air.
Avoid operating the P-726 in environments that can increase the electric conductivity.
Only operate the P-726 within the permissible ambient conditions and classifications
(p. 14).
NOTICE
Destruction of the piezo actuator by continuously high voltage!
The constant application of high voltage to piezo actuators can lead to leakage currents and
flashovers that destroy the ceramic.
If the P-726 is not used, but the controller is to remain switched on to ensure temperature
stability:
Set the piezo voltage to 0 V on the controller.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 7 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
NOTICE
Uncontrolled oscillation!
Oscillations can cause irreparable damage to the P-726. Oscillations are indicated by a
humming and can result from the following causes:
The load and/or dynamics of operation differ too much from the calibration settings.
The P-726 is operated near its resonant frequency.
If you notice oscillations, stop the P-726 immediately.
INFORMATION
Extended cables can affect the performance of the P-726.
Do not use cable extensions. If you need longer cables, contact our customer service
department (p. 12).
Product Description
Product View
Figure 1: P-726.1CD with thread adapter (example)
1Turret ring of the QuickLock adapter (to be ordered separately)
2Knurled ring
3Base body
4Connecting cable

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 8 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Scope of Delivery
Product number Description
P-726.1CD PIFOC high-load objective scanner
PZ240EK Short instructions for piezo positioning systems
P726T0001 Technical note for QuickLock thread option for P-726
Suitable Controllers
Product number Description
E-754 Digital piezo controller
E-709 Digital piezo controller
E-625 Piezo servo controller
E-665 Piezo amplifier / servo controller
E-500 Modular piezo controller system with E-505 high-power amplifier module and
E-509 servo controller
Accessories
Product number Description
P-726.04 P-726 PIFOC thread adapter M28 × 0.75
P-726.05 P-726 PIFOC thread adapter M32 × 0.75
P-726.06 P-726 PIFOC thread adapter M26 × 1/36"
P-726.11 P-726 PIFOC thread adapter M25 × 0.75
P-726.12 P-726 PIFOC thread adapter W0.8 × 1/36"
P-895.1DLC
Adapter cable D-sub 7W2 (f) to LEMO for piezo actuator nanopositioning
systems with capacitive sensors, 1 channel, 0.3 m. Fits controllers with LEMO
connectors (1 × voltage, 2 × sensor).

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 9 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Installation
Connecting the P-726 to a Protective Earth Conductor
The P-726 has no separate protective earth connection. The system into which the P-726 is
integrated (e.g., surrounding mechanical system) must be connected to a protective earth
conductor (required cross-sectional area of the cable ≥0.75 mm2).
When you connect the P-726 to a protective earth conductor:
1. Make sure that the contact resistance is <0.1 Ω at 25 A at all connection points relevant
for mounting the protective earth conductor.
2. Observe the applicable standards for mounting the protective earth conductor.
Affixing the P-726 to the Microscope
Requirements
You have read and understood the safety precautions (p. 5).
Tools and accessories
P726T0001 technical note for PIFOC QuickLock Thread Option for P-726 (p. 8)
QuickLock thread adapter (p. 8) (not included)
Suitable tools
Affixing the P-726 to the microscope
Install the P-726 as described in the P726T0001 technical note for PIFOC QuickLock
thread option (p. 7).
Installing the Objective
Correct:
Figure 2: Center of load close to aperture

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 10 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Incorrect:
Mounting the load incorrectly causes high strain on the flexure guides in the objective scanner,
high torques and the danger of oscillations.
Figure 3: Center of load far below the aperture
Requirements
You have read and understood the safety precautions (p. 5).
Tools and accessories
P726T0001 technical note for QuickLock thread option for P-726 (p. 8)
QuickLock thread adapter (p. 8) (not included)
Objective to be installed
Suitable tools
Installing the objective
Screw the objective into the P-726. See the P726T0001 technical note (p. 7) for details.
Start-Up and Operation
Requirements
You have read and understood the safety precautions (p. 5).
Start-up and operation
Follow the instructions in the manual of the piezo controller used for start-up and
operation of the P-726.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 11 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Discharging the P-726
The P-726 must be discharged before demounting. Demounting is necessary e.g., before
cleaning or transporting the P-726 as well as for modifications
Discharging a P-726 that is connected to the controller
In closed-loop operation:
1. Switch off the servo mode on the controller.
2. Set the piezo voltage to 0 V on the controller.
In open-loop operation:
Set the piezo voltage to 0 V on the controller.
Discharging a P-726 that is not connected to the controller
Connect the P-726 to the switched-off PI controller for 10 seconds.
Maintenance
NOTICE
Misalignment from loosening screws on the base body!
The P-726 is maintenance-free and precisely aligned.
Only loosen screws according to the instructions in this manual.
Do not open the P-726.
Cleaning the P-726
Requirements
You have discharged the piezo actuators of the P-726.
You have disconnected the P-726 from the controller.
Cleaning the P-726
When necessary, clean the surface of the P-726 with a cloth that is lightly dampened
with a mild cleanser or disinfectant (e.g., alcohol or isopropyl alcohol).
Do not do any ultrasonic cleaning.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 12 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Customer Service
For inquiries and orders, contact your PI sales engineer or send us an email ([e-mail]).
If you have questions concerning your system, provide the following information:
−Product and serial numbers of all products in the system
−Firmware version of the controller (if applicable)
−Version of the driver or the software (if applicable)
−Operating system on the PC (if applicable)
If possible: Take photographs or make videos of your system that can be sent to our
customer service department if requested.
The latest versions of the user manuals are available for download on our website (www.pi.ws).
Technical Data
Specifications
P-726.1CD Unit Tolerance
Active axes Z
Motion and positioning
Integrated sensor Capacitive / direct measuring
Travel range, closed loop 100 µm
Resolution, closed loop 0.4 nm typ.
Resolution, open loop 0.3 nm typ.
Linearity error, closed loop 0.02 % typ.
Repeatability ±3 nm typ.
Crosstalk in X, Y 50 nm typ.
Mechanical properties
Stiffness in motion direction 3.4 N/µm ±20 %
Resonant frequency, no load 1120 Hz ±20 %
Resonant frequency, under load, 210 g 560 Hz ±20 %
Resonant frequency, under load, 310 g 480 Hz ±20 %
Push/pull force capacity in motion
direction
100 / 50 N max.
Load capacity 20 N max.
Drive properties
Piezo ceramic type PICMA® P-885
Electrical capacitance 6 µF ±20 %

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 13 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
P-726.1CD Unit Tolerance
Miscellaneous
Operating temperature range -20 to 80 °C
Material Aluminum, steel
Objective thread M32
Mass 575 g ±5 %
Cable length 1.5 m ±10 mm
Sensor/voltage connection D-sub 7W2 (m)
Recommended electronics E-505, E-621, E-625, E-665,
E-709, E-754
The resolution of the system is limited only by the noise of the amplifier and the measuring
technology because PI piezo nanopositioning systems are free of friction.
All specifications based on room temperature (22 °C ±3 °C).
Ask about customized versions.
Maximum Ratings
P-726 objective scanners are designed for the following operating data:
Maximum operating voltage
Maximum operating
frequency (unloaded)1
Maximum power
consumption2
-20 to 120 V 100 Hz 20 W
1To ensure stable operation, the maximum operating frequency is defined as approximately
1/3 of the mechanical resonant frequency.
2The heat generated by the piezo actuator during dynamic operation limits the value for
maximum power consumption.
Details can be found online:
http://piceramic.com/piezo-technology/properties-piezo-actuators/electrical-operation.html

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 14 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Ambient Conditions and Classifications
Area of application For indoor use only
Maximum altitude 2000 m
Air pressure 1100 hPa to 1013 hPa
Relative humidity Highest relative humidity 80 % for temperatures up to 31 °C
Decreasing linearly to 50 % relative humidity at 40 °C
Storage temperature -20 °C to 80 °C
Transport temperature -25 °C to 85 °C
Overvoltage category II
Protection class I
Degree of pollution 1
Degree of protection
according to IEC 60529
IP20

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 15 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Dimensions
Dimensions in mm.
Figure 4: Dimensions of the P-726.1CD

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 16 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Pin Assignment
D-sub 7W2 (m) connector
Figure 5: D-sub 7W2 (m) connector (front view)
Pin Signal Function
A1 inner conductor Input Piezo voltage +
A2 inner conductor Output Probe sensor signal
(nonmoving part of the capacitive sensor)
A2 outer conductor GND Shield
1 Bidirectional Data line for ID chip
2 GND Shield of Target
Ground of ID chip when switched on
3 Input Piezo voltage –
4 N.C. Not connected
5 Input Target sensor signal
(movable part of the capacitive sensor)
The connector shell is connected to the cable shield.

User Manual
P726T0002, valid for P-726.1CD
CBo, 10/18/2019
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 17 / 17
Phone [phone]
-0, Fax [phone], Email inf[email protected], www.pi.ws
Old Equipment Disposal
In accordance with EU law, electrical and electronic equipment may not be disposed of in EU
member states via the municipal residual waste.
Dispose of your old equipment according to international, national, and local rules and
regulations.
In order to fulfil its responsibility as the product manufacturer, Physik Instrumente (PI) GmbH &
Co. KG undertakes environmentally correct disposal of all old PI equipment made available on
the market after 13 August 2005 without charge.
Any old PI equipment can be sent free of charge to the following address:
Physik Instrumente (PI) GmbH & Co. KG
Auf der Roemerstr. 1
D-76228 Karlsruhe, Germany