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CONTENTS
INTRODUCTION 1
GENERAL SETUP AND REQUIREMENTS 2
HARDWARE SETUP 3
SOFTWARE SETUP 4
ADJUSTMENT PROCEDURE OVERVIEW 5
PROCEDURE FOR MECHANICAL
ADJUSTMENT 5
Mechanical coarse adjustment . . . . . . . . 5
Mechanical ne adjustment . . . . . . . . . . 5
PROCEDURE FOR AUTOMATIC
ELECTRICAL ADJUSTMENT 6
Filter conguration . . . . . . . . . . . . . . . 6
Automatic analog adjustment . . . . . . . . . 7
Automatic digital adjustment . . . . . . . . . 7
Automatic eccentricity adjustment (optional) . 8
FURTHER CONFIGURATION HINTS 9
Filter conguration for system development . 9
Port conguration and output signals . . . . . 9
BiSS Reader Software . . . . . . . . . . . . . 9
REVISION HISTORY 10
INTRODUCTION
The iC-PZ is an EncoderBlue
®
lensless reective opti-
cal encoder IC featuring integrated HD Phased Array
photosensors and a blue LED in an OptoQFN32 pack-
age. It is designed for high-resolution absolute position
measurement without the need for highly accurate align-
ment of each encoder system. To achieve this goal,
numerous automatic calibrations are implemented.
This application note discusses the proposed adjust-
ment procedure both for the development phase and
mass production.
Complete information on the iC-PZ is available at
www.ichaus.de/iC-PZ
Copyright ©2019 iC-Haus http://www.ichaus.com
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GENERAL SETUP AND REQUIREMENTS
Figure 1 shows the setup used in this application note.
It consists of
•Motherboard (iC-PZ EVAL PZ1D) [1]
•Scanner module (iC-PZ2656 EVAL PZ1M) [2]
•BiSS-to-PC adapter (iC-MB4 iCSY MB4U) [3]
•Drive with mounted code disc (PZ03PS) [4]
•A PC with running Windows 7 operating system.
Note:
Other BiSS-to-PC adapters like iC-MB3 iCSY
MB3U, iC-MB3 iCSY MB3U-I2C and iC-MB5 iCSY
MB5U can also be used. In any case, the related
driver has to be installed before connecting the BiSS-
to-PC adapter to the PC. The latest drivers are
available at www.ichaus.de/adapter_drivers. A com-
parison of the different adapters can be found at
www.ichaus.de/MB3AN2_appnote_en.
Note:
The graphical user interface (GUI) software
requires a windows operating system and the Lab-
VIEW
™
Run-Time Engine (RTE). See chapter SOFT-
WARE SETUP for further information.
Note:
The adjustment procedures described in chap-
ters PROCEDURE FOR AUTOMATIC ELECTRICAL
ADJUSTMENT and PROCEDURE FOR MECHANI-
CAL ADJUSTMENT are applicable for other setups
as well if the respective electrical connections are
correct.
Figure 1:
Hardware setup: Motherboard
[1]
, scanner module
[2]
, BiSS-to-PC adapter
[3]
and drive with
mounted code disc [4]
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HARDWARE SETUP
To congure iC-PZ using the graphical user interface
software, the hardware has to be connected as follows:
1.
Connect the scanner module to the motherboard
via the included 20-pin ribbon cable.
2.
Connect the motherboard to the BiSS-to-PC
Adapter.
3.
Connect the BiSS-to-PC Adapter to the PC via
the usb cable. Please make sure you have in-
stalled the related driver before connecting the
BiSS-to-PC adapter to your PC.
4.
Ensure the jumper setup of the scanner module
is in default conguration:
•CFG_0/ JP1 = M (= VDDIO/2)
•CFG_1/ JP2 = L (= GNDIO)
•CFG_2/ JP3 = H (= VDDIO)
Figure 2:
Scanner module (iC-PZ2656 EVAL PZ1M)
and code disc PZ03PS in detail
5.
Ensure jumper setup of motherboard is in the
following conguration:
•JP1 = Closed (VDDIO supplied by VDDA)
•JP2 = Closed (GNDIO connected to GNDA)
•JP3 = Open
•JP4 = Open
•JP5 = Closed (BiSS Port enabled)
Figure 3:
Motherboard (iC-PZ EVAL PZ1D) in detail
6. Connect a 5V power supply to the motherboard.
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SOFTWARE SETUP
For easy conguration of iC-PZ, iC-Haus offers a graph-
ical user interface (GUI) that can be used on a PC that
runs the Windows operating system.
1.
Download the latest iC-PZ GUI. Note that the GUI
requires the LabVIEW
™
Run-Time Engine (RTE).
Both a software package with GUI only and a
software package with GUI and its related RTE
version are available at www.ichaus.de/iC-PZ.
2.
Install the iC-PZ GUI. A detailed description of the
GUI setup can be found in the enclosed software
manual.
3.
Start the iC-PZ GUI and accept the End User
License Agreement (EULA).
4. Click ’Connect’.
Figure 4: GUI start-up
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ADJUSTMENT PROCEDURE OVERVIEW
Figure 5: Order of adjustment procedures
PROCEDURE FOR MECHANICAL ADJUSTMENT
Best measurement results are achieved at the ideal
mechanical position. iC-PZ supports this process of
nding the ideal position by offering white marks on the
scanner module for coarse adjustment and dynamic
values in the GUI for ne adjustment.
Mechanical coarse adjustment
Figure 6:
White marks on scanner module
(iC-PZ2656 EVAL PZ1M) for mechanical
coarse adjustment
•
White marks on top of the scanner module
(iC-PZ2656 EVAL PZ1M) help to easily nd the coarse
position of the sensor iC with respect to the code track.
The scanner module is moved until the curved white
mark completes the cicumference of the code disc as
shown in Figure 6. Note that the recommended air
gap betweeen code disc and sensor is 1 mm to 2 mm.
Mechanical ne adjustment
•
Rotate/ move at least at minimum speed required for
the automatic analog adjustment. The following val-
ues are recommended:
Rotary (iC-PZ2656): 300 RPM
Linear (iC-PZ205): 25.6 cm/s
•
In the GUI tab ’Signal Conditioning’ section ’Digital Ad-
justment’ enable dynamic phase and dynamic scale
adjustment by setting
AI_S_SEL = ’4’ [ = 0x04]
AI_P_SEL = ’4’ [ = 0x04]
•
Continuously read AI_PHASES and AI_SCALES. The
registers show the currently effective adjustment val-
ues and are marked with a yellow frame in Figure
7.
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Figure 7: Mechanical adjustment
•
By mechanical adjustment, change the position of the
IC with respect to the code disc/ linear scale until
AI_SCALES = ’1.00’
AI_PHASES = ’0 deg e’
•
When the ideal position is found, stop ’Reading...’ and
disable dynamic phase and dynamic scale adjustment
by setting
AI_S_SEL = ’Disabled’ [ = 0x00]
AI_P_SEL = ’Disabled’ [ = 0x00]
Then perform automatic electrical adjustment.
PROCEDURE FOR AUTOMATIC ELECTRICAL ADJUSTMENT
iC-PZ is designed for high resolution position measure-
ment without the need for precise mechanical alignment
of the IC to the code disc or linear scale. Highly au-
tomated production processes can only provide place-
ment with limited accuracy. To correct the errors re-
sulting from mechanical misplacement, iC-PZ provides
numerous automatic calibration functions. The follow-
ing procedure is proposed for the automatic electrical
adjustment:
Filter conguration
•
In tab ’System Cong’ set lter parameters to its de-
fault values
IPO_FILT1 = ’110’ [ = 0x6E]
IPO_FILT2 = 4 [ = 0x04]
to allow stable operation with systems that are not yet
electrically adjusted.
Figure 8: Filter conguration
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Automatic analog adjustment
•
In tab ’Signal Conditioning’ section ’Analog Adjust-
ment’ set
AC_COUNT = ’0d08’ [ = 0x08]
AC_SEL1 = ’15 (default)’ [ = 0x0F]
AC_SEL2 = ’Best but longest auto-calibration’
[ = 0x00]
•
Rotate/ move at least at minimum speed required for
the automatic analog adjustment. The following val-
ues are recommended:
Rotary (iC-PZ2656): 300 RPM
Linear (iC-PZ205): 25.6 cm/s
•
Send command AUTO_ADJ_ANA to execute auto-
calibration.
Figure 9: Automatic analog adjustment
Automatic digital adjustment
•
In tab ’Signal Conditioning’ section ’Digital Adjust-
ment’ set
AC_COUNT = ’0d08’ [ = 0x08]
AC_SEL1 = ’15 (default)’ [ = 0x0F]
AC_SEL2 = ’Best but longest auto-calibration’
[ = 0x00]
•
Rotate/ move at least at minimum speed required for
the automatic digital adjustment. The following values
are recommended:
Rotary (iC-PZ2656): 300 RPM
Linear (iC-PZ205): 25.6 cm/s
•
Send command AUTO_ADJ_DIG to execute autocali-
bration.
Figure 10: Automatic digital adjustment
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Automatic eccentricity adjustment (optional)
•In tab ’Position Offset’ set
ST_OFF = ’0’ [ = 0x00] (iC-PZ revision Z only)
Figure 11: Offset
•
In tab ’Signal Conditioning’ section ’Eccentricity Ad-
justment’ set
AC_COUNT = ’0d04’ [ = 0x04]
AC_SEL1 = ’15 (default)’ [ = 0x0F]
AC_SEL2 = ’Best but longest auto-calibration’
[ = 0x00]
ECC_EN = ’0’ [ = 0x00]
•
Rotate at least at minimum speed required for the au-
tomatic eccentricity adjustment. The following value
is recommended:
Rotary (iC-PZ2656): 300 RPM
•
Send command AUTO_ADJ_ECC to execute auto-
calibration.
•To enable eccentricity correction set
ECC_EN = ’1’ [ = 0x01]
Figure 12: Automatic eccentricity adjustment
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•
After performing automatic adjustment procedures
analog and ABZ output signals can be checked with
an oscilloscope. Figure shows the positive sine (yel-
low) and cosine (blue) signal at output pins PSIN
and PCOS of the motherboard (iC-PZ EVAL PZ1D).
Please note that the single-ended output signals
should have an offset of 2.5 V and an amplitude of
about 250 mV in default analog output selection.
Figure 13:
Measuring analog output signals at pin
PSIN and PCOS of motherboard (iC-PZ
EVAL PZ1D)
Figure 14:
Single-ended analog output in clockwise
rotation: Positive sine (yellow) and cosine
(blue) with offset of 2.5 V and amplitude of
about 250 mV
FURTHER CONFIGURATION HINTS
Filter conguration for system development
•The default lter values
IPO_FILT1 = 110 [ = 0x6E]
IPO_FILT2 = 4 [ = 0x04]
ensure stable lter operation before analog signal ad-
justment compensates signal errors. However, with
the default settings, neither high-precision nor high-
dynamic-systems show best performance. It is thus
recommended to change the lter settings after signal
adjustment. As a starting point for system develop-
ment, the following settings are recommended:
IPO_FILT1 = 25 [ = 0x19]
IPO_FILT2 = 4 [ = 0x04]
Port conguration and output signals
•
The jumper setup of the scanner module (iC-PZ2656
EVAL PZ1M) recommended in this application note
enables analog (PORTC), ABZ (PORTB) and BiSS
(PORTA) outputs. Other possible output signals are
SSI, UVW and SPI. For more information regarding
the port conguration check the eval board descrip-
tion and the datasheet at www.ichaus.de/iC-PZ
BiSS Reader Software
•
To evaluate the BiSS sensor communication, iC-Haus
offers a BiSS Reader Software. Note that
the BiSS Reader requires LabVIEW
™
Run-Time
Engine (RTE). The current version and its re-
lated software manual are available with RTE at
www.ichaus.de/BiSS_gui_rte and without RTE at
www.ichaus.de/BiSS_gui.
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REVISION HISTORY
Rel. Rel. Date∗Chapter Modication Page
A1 2019-04-02 all Initial release
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particular, this also applies to the stated possible applications or areas of applications of the product.
iC-Haus products are not designed for and must not be used in connection with any applications where the failure of such products would reasonably be
expected to result in signicant personal injury or death (Safety-Critical Applications) without iC-Haus’ specic written consent. Safety-Critical Applications
include, without limitation, life support devices and systems. iC-Haus products are not designed nor intended for use in military or aerospace applications or
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iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade
mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.
Software and its documentation is provided by iC-Haus GmbH or contributors "AS IS" and is subject to the ZVEI General Conditions for the Supply of Products
and Services with iC-Haus amendments and the ZVEI Software clause with iC-Haus amendments (www.ichaus.com/EULA).
∗Release Date format: YYYY-MM-DD
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