Avago HEDS-8949 Manual de usuario
1. Introduction
Overview
This user manual describes the Avago HEDS-8949 and
HEDS-8969 alignment kit. The kit features real-time IC
monitoring the IC output during user alignment. The
alignment kit consists of the IC interface hardware and
Windows software. The IC interface hardware is a mi-
crocontroller system that connects the HEDS-8949 /
HEDS-8969 encoder to the PC through a USB cable. This
user manual includes hardware setup, software setup and
software operating illustrations.
Features
•Bus-powered USB device
•Real-time monitoring of LocTest and TiltOut output
•Real-time monitoring A/B Incremental signal pairs or
Sine/Cosine signal pairs.
•Real-time monitoring of SSI data.
•Data capturing rate at 4000 samples per second
Ordering Information
HEDS-8949 for AEAT-9000-1GSH0
HEDS-8969 for AEAT-9000-1GSH1 and AEAT-9035
HEDS-8949 & HEDS-8969
Alignment Kit for AEAT-9000 Encoders
User Manual
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Figure 2. Alignment kit components for HEDS-8949 Figure 3. Alignment kit components for HEDS-8969
Figures 2 and 3 show the various components provided in the alignment kits.
The USB cable (1) connects to the USB port of the alignment kit (2).
Figure 1. Inside the alignment kit box
2. Hardware Components
Unpacking the Unit
Figure 1 illustrates the typical packing of the HEDS-8949/
HEDS-8969 alignment kit.
The package includes:-
1. USB cable
2. Alignment module (HEDS-8949/8969)
3. Encoder cable (HEDS-8949/8969)
(24/30 pin for HEDS-8949, AEAT-9000-1GSH0)
or
(24/16 pin for HEDS-8969, AEAT-9000-1GSH1/AEAT-9035)
4. Installation CD
1
2
3
4
1
2
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3
Figure 6. Encoder cable and connectors: 24-way cable for connecting the encoder IC of the target system
Connect the alignment kit to your PC using the provided USB cable. When the alignment module is powered-up the red
LED will illuminate. The green LED will blink when there is communication between the PC and encoder.
The kit’s current consumption is less than 200 mA. The kit includes a 100 mA current limiting circuit for the encoder.
If the current consumption for the alignment kit exceeds 100 mA, the programmer will cut o the supply to the encoder.
On the left side of the programmer is the programming connector, which is a 24-pin (2 x 12) rectangular header.
This connector is used to connect a cable harness to the encoder. Figure 6 shows the encoder cable and connectors.
The programming connector pin names and function are described in Table 1 (shown on next page).
Matching
Connector
Encoder Connector
(To Target System)
Pin 1
23 21 19 17 15 13 11 9 7 5 3 1
24 22 20 18 16 14 12 10 8 6 4 2
Use for AEAT-9000-1GSH0
Figures 4 and 5 show the HEDS-8949/ HEDS-8969 alignment modules.
Figure 5. Alignment module top cover for HEDS-8969Figure 4. Alignment module top cover for HEDS-8949
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Table 1. Programming connector pin descriptions
PIN Name Function
PIN 1 INCA Incremental A Input
PIN 2 INCB Incremental B Input
PIN 3
PIN 4
PIN 5 SCL+ SSI Shift Register Clock
PIN 6 SPI_SI SPI Data Input
PIN 7 SPI_CLK SPI Clock
PIN 8 NSL+ SSI Enable
PIN 9 LERR Error pin
PIN 10 GND IC Ground
PIN 11 Zero_RST Zero Reset Input
PIN 12 DOUT SSI Data Output
PIN 13 Vdd IC supply
PIN 14 LocTest Alignment Locate Signal
PIN 15 MSBINV Inverted Counting Input
PIN 16
PIN 17
PIN 18 TiltOut Tilt Alignment Output
PIN 19 DIN+ SSI Data Input
PIN 20 SPI_SO SPI Data Output
PIN 21 Cosine+ Cosine+ Input
PIN 22 Sine+ Sine+ Input
PIN 23 Cosine- Cosine- Input3
PIN 24 Sine- Sine- Input4
The encoder cables are shown below in gures 7a and 7b.
Figure 7a. Encoder cable, HEDS-8969 (for AEAT-9000-1GSH1/AEAT-9035) Figure 7b. Encoder cable, HEDS-8949 (for AEAT-9000-1GSH0)
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Figure 9. Installation folder selection screen. Specify the installation folder to change the default path. Click Next to continue.
Figure 8. Software installation start up screen. Click Next to start installation.
3. Software Installation
The user manual and the programmer application software are on the installation CD. To install the applica-
tion software, browse the installation CD using Explorer and double-click the 'Avago AEAT-9000 Alignment
Kit' icon. The installation will run automatically. Figures 8, 9 and 10 illustrate the software installation process.
Figure 5: Software installation start up screen. Click Next to start installation.
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Figure 10. Click Next to conrm and start the installation.
The installation process will continue after the step shown in Figure 10, and nally, an“Installation Complete”screen will
be shown.
Locate the software by selecting Start > All Program > Avago AEAT-9000 Alignment Kit > AEAT-9000 Alignment Kit to
run the software.
To uninstall the software, open the Windows’ Control Panel, run the ”Add or Remove Program”, and locate ”Avago
AEAT-9000 Alignment Kit”. Click “Change/Remove” and follow the screen instructions to remove the software.
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4. Software Application
4.1 Device Monitoring
To run the application software, click Start > All Program > Avago AEAT-9000 Alignment Kit > AEAT-9000 Alignment Kit.
After selecting the software, the screen in Figure 11 will appear.
The software has two tabs: Device Monitoring and Alignment. Device Monitoring provides real-time display of encoder
data, and Alignment provides the interface for aligning the code disc.
Figure 11 shows the main screen of the software. When the ”Connect” button is clicked, the software will locate and
connect to the alignment kit. Once connected, real-time SSI angular data will be streamed to the software and displayed
as raw 17-bit SSI data as well as the converted mechanical degree position. This is illustrated in Figure 12.
Selection of Device Monitoring and
Alignment Mode Press this button to
link the software to
the Alignment Kit.
Figure 11. Optical encoder alignment main screen
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Figure 12. Device monitoring tab
Selection of signal pairs for signal plotting
Virtual Oscilloscope
The Zero Reset button allows the user to zero oset the encoder’s position data. When clicked, the alignment kit will be
commanded to send a short HIGH pulse of 10 ms to the Zero_RST pin of the encoder.
Check the ‘MSB Invert’ check box if inverted counting is required. When ‘MSB Invert’ is checked, the alignment kit will
output a HIGH level on the “MSBINV” pin and vice versa.
The software contains a virtual oscilloscope for plotting real-time data. For display, the user can select between two
signal pairs: incremental A/B signal pairs and Sine/Cosine signal pairs. Signals are sampled at a 4000 Hz rate and trans-
ferred to the software via the USB bus. The software calculates the frequency of the signal, and derives the encoder disc
rotation speed in RPM (Rotation per Minute).
The timebase, volts per division and oset are set by the controls at the bottom of the screen shown in Figure 12. Four
trigger modes are supported: None, Single, Normal and Stopped. The trigger source is xed to the A signal for A/B incre-
mental signal pairs and the sine signal for Sine/Cosine signal pairs.
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4.2 Alignment Mode
The alignment mode provides an interface for monitoring the LocTest and TiltOut signals for aligning the code disc.
Figure 13 shows the alignment mode screen.
The alignment mode measures and analyzes the LocTest and TiltOut signals and provides necessary alignment data to
the user. The description of each alignment parameter is given in Table 2.
Figure 13. Alignment mode
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Table 2. Alignment data
Vp-p MAX (LOCTEST) The maximum peak-to-peak voltage for the LOCTEST signal. The amplitude of the signal
will depend on the total stack-up TIR of the code wheel.
1.90
2.00
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
0 45 90 135 180 225 270 315 360
Nominal
V
Duty % AVG Duty % is calculated on the TiltOut signal with the following formula:
V ( )
SLO
0° 180° 360°
t
T
t
Duty % = x 100%
T
The average value of Duty % is then calculated based on the number of valid TILTOUT
pulses captured.
ON Pulse Width The ON pulse width of the TiltOut signal, t.
Pulse Ratio The ratio of periods between pulses generated at TiltOut.
V ( )
SLO
0° 180° 360°
T1 T2
T1
Pulse Ratio =
T2
Results Provides a PASS / FAIL indicator based on the specication limit provided by the user.
Vp-p
Este manual sirve para los siguientes modelos
1
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