PI P-726.1CD User manual

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany
Phone [phone]
-0, Fax [phone], Email [email protected], www.pi.ws
P-726.1CD
PIFOC High-Load Objective Scanner

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 2 / 17
Phone [phone]
-0, Fax [phone], Email [email protected], www.pi.ws
Contents
About this Document 3
Symbols and Typographic Conventions............................................................................................................... 3
Downloading Manuals......................................................................................................................................... 3
Safety 4
Intended Use ....................................................................................................................................................... 4
Safety Precautions............................................................................................................................................... 4
Product Description 6
Product View ....................................................................................................................................................... 6
Scope of Delivery ................................................................................................................................................. 7
Suitable Controllers ............................................................................................................................................. 7
Accessories .......................................................................................................................................................... 7
P-726.xx QuickLock Thread Adapter Sets for P-726........................................................................................................ 7
Adapter Cables................................................................................................................................................................ 7
Installation 8
Connecting the P-726 to a Protective Earth Conductor ...................................................................................... 8
Fixing the P-726 to the Microscope..................................................................................................................... 8
Component Overview ..................................................................................................................................................... 8
Mounting the P-726.xx QuickLock Thread Adapter Set .................................................................................................. 8
Startup and Operation 10
Discharging the P-726 10
Maintenance 10
Cleaning the P-726 ............................................................................................................................................ 11
Removing the P-726 from the Microscope ....................................................................................................... 11
Customer Service 12
Technical Data 13
Specifications..................................................................................................................................................... 13
Maximum Ratings.............................................................................................................................................. 14
Ambient Conditions and Classifications ............................................................................................................ 14
Dimensions ........................................................................................................................................................ 15
Pin Assignment .................................................................................................................................................. 16
Old Equipment Disposal 17

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 3 / 17
Phone [phone]
-0, Fax [phone], Email [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).
Downloading manuals
1. Open the website www.pi.ws.
2. Search the website for the product number (e.g., P-726) or the product family (e.g.,
PIFOC).
3. Click the corresponding product to open the product detail page.
4. Click Downloads.
The manuals are shown under Documentation.
5. Click the desired manual and fill out the inquiry form.
The download link will then be sent to the email address entered.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 4 / 17
Phone [phone]
-0, Fax [phone], Email [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.
It is only possible to use the P-726 as intended 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 P-726 before installation:
Connect the P-726 to the switched-off PI controller, which is equipped with an internal
discharge resistor.
Do not pull the connector out of 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 P-726 with screws against being pulled out of the controller.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 5 / 17
Phone [phone]
-0, Fax [phone], Email [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. 8) before startup.
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.
When the P-726 is not used but the controller remains 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, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 6 / 17
Phone [phone]
-0, Fax [phone], Email [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, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 7 / 17
Phone [phone]
-0, Fax [phone], Email [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
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
P-726.xx QuickLock Thread Adapter Sets for P-726
The P-726.xx QuickLock thread adapters are available with apertures that have various different
inner diameters:
Product number QuickLock thread adapter
Thread size Aperture diameter
P-726.04 M28 x 0.75 mm 23 mm
P-726.05 M32 x 0.75 mm 27 mm
P-726.06 M26 x 1/36" 21 mm
P-726.11 M25 x 0.75 mm 21 mm
P-726.12 W0.8 x 1/36" 16 mm
P-726.04 M28 x 0.75 mm 23 mm
To order, contact our customer service department (p. 12).
Adapter Cables
Product number Description
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).
To order, contact our customer service department (p. 12).

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 8 / 17
Phone [phone]
-0, Fax [phone], Email [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. Pay attention to the applicable standards for mounting the protective earth conductor.
Fixing the P-726 to the Microscope
P-726 PIFOC positioners are installed using QuickLock thread adapters.
Component Overview
Fig. 2: Included key tool
Fig. 3: PIFOC exploded view, as mounted on non-
inverted microscope
Fig. 4: Recesses in the turret ring
Mounting the P-726.xx QuickLock Thread Adapter Set
NOTICE
Possible damage due to excessive torque!
Only moderate torque is required to fix the objective ring in the PIFOC body.
Use the key tool supplied for tightening the objective ring.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 9 / 17
Phone [phone]
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Requirements
The PIFOC positioner is not connected to the electronics.
Tools and accessories
P-726.xx QuickLock thread adapter set (p. 7)
Key tool supplied (refer to Fig. 2, p. 8)
Mounting the P-726.xx QuickLock thread adapter set
1. Screw the objective ring into the PIFOC using the key tool supplied. Use the wide side of
the key tool to engage the recesses in the ring. Grip the tool by hand only.
Fig. 5: Objective ring with recesses inside PIFOC can be tightened with key tool
2. Insert the turret ring into the knurled ring.
Fig. 6: Insertion of turret ring into knurled ring
3. Screw the turret ring together with the knurled ring clockwise into the microscope (not
shown). Use the narrow side of the key tool to engage the recesses in the ring. Grip the
tool by hand only.
4. Affix the PIFOC to the microscope: Align the PIFOC with the knurled ring and screw the
knurled ring onto the PIFOC.
Fig. 7: Screwing the knurled ring onto the PIFOC

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 10 / 17
Phone [phone]
-0, Fax [phone], Email [email protected], www.pi.ws
5. Screw the objective into the objective ring of your PIFOC.
Fig. 8: Objective installed in PIFOC
Startup and Operation
Requirements
You have read and understood the safety precautions (p. 4).
Startup and operation
Follow the instructions in the manual of the piezo controller used for startup and
operation of the P-726.
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.
Loosen any screws only when instructed in this manual.
Do not open the P-726.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 11 / 17
Phone [phone]
-0, Fax [phone], Email [email protected], www.pi.ws
Cleaning the P-726
NOTICE
Damage from ultrasonic cleaning!
Ultrasonic cleaning can damage the P-726.
Do not do any ultrasonic cleaning.
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).
Removing the P-726 from the Microscope
Requirements
The PIFOC positioner is not connected to the electronics.
Tools and accessories
Key tool supplied (refer to Fig. 2, p. 8)
Removing the P-726 from the microscope
1. Remove the PIFOC from the microscope (not shown): Hold the PIFOC by the base body
with one hand and unscrew the knurled ring from the PIFOC with the other hand as
shown in the figure below.
Fig. 9: Unscrewing the knurled ring
2. If the turret ring needs to be removed from the microscope, use the narrow side of the
key tool to unscrew the ring from the microscope (not shown). Grip the tool by hand
only.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 12 / 17
Phone [phone]
-0, Fax [phone], Email [email protected], www.pi.ws
3. If the objective needs to removed, unscrew it from the PIFOC body. The objective ring
will probably remain in the PIFOC.
Fig. 10: Objective installed in PIFOC
4. If the objective ring is still in the PIFOC and needs to be removed, use the wide side of
the key tool supplied to unscrew the ring from the PIFOC. Grip the tool by hand only.
Fig. 11: Objective ring with recesses inside PIFOC can be loosened with key tool
Customer Service
For inquiries and orders, contact your PI sales engineer or send us an email ([email protected]).
If you have any 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 (p. 3) on our website.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 13 / 17
Phone [phone]
-0, Fax [phone], Email [email protected], 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 %
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.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 14 / 17
Phone [phone]
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Maximum Ratings
P-726 objective scanners are designed for the following operating data:
Maximum operating voltage Maximum operating
frequency (no load)1
Maximum power
consumption2
-20 to 120 V 100 Hz 20 W
1To ensure stable operation, the maximum operating frequency has been defined as around
one third of the mechanical resonant frequency.
2The heat that is generated by the piezo actuator during dynamic operation limits the value for
maximum power consumption.
Details can be found at the following website:
https://www.physikinstrumente.com/en/technology/piezo-technology/properties-piezo-
actuators/electrical-operation/
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, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 15 / 17
Phone [phone]
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Dimensions
Dimensions in mm.
Figure 12: Dimensions of the P-726.1CD

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 16 / 17
Phone [phone]
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Pin Assignment
D-sub 7W2 (m) connector
Figure 13: 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 cable shield is connected to the connector shell.

User Manual
P726T0002, valid for P-726.1CD
CBo, 6/10/2020
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 17 / 17
Phone [phone]
-0, Fax [phone], Email [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