00196044-05 - sg x und x4i fse_en.pdf - 第129页
Communication and Control Position Measuring System Axis Control S tudent Guide (FSE) SIPL ACE X Series and X4I Edition 01/2009 EN Communication and Control 129 4.4 Axis Control 4.4.1 Position Measuring System 4.4.1.1 T …
Communication and Control
CAN Bus Tape Cutter and Nozzle Changer - Communication
Student Guide (FSE) SIPLACE X Series and X4I
Communication and Control Edition 01/2009 EN
128
LEDs - meanings
Cable assignment at connector X1
The power connection has 2 pins for selection of the suitable CAN ID. This depends on the position
(location) of the CAN node module in the machine.
DIP switch 3
1 ON: CAN ID DIP switch 2/3 – OFF: Cable select
2CAN -ID 0ON: Gantry 1
ON
OFF.Gantry 2
ON
ON: Gantry 3
OFF
OFF: Gantry 4
OFF: Cable select
3 CAN - ID 1
4 ON: Tape cutter only – OFF: Nozzle changer & tape cutter
5 ON: Module in reset mode – OFF: Module in standard mode
LED Meaning
V39 Component reject bin
V45 Nozzle reject bin
V41 CPU green status LED
V43 CPU red status LED
V40 Nozzle changer 2 light barrier 24 V
V38 Nozzle changer 2 valve active
V44 Nozzle changer 1 light barrier 24 V
V42 Nozzle changer 1 valve active
Pin Signal name Signal type Comments
1 P_24V Input 24 V energy supply
2 GND - Ground
3 CANID_0 Digital input Ground (open) or 24 V (250 µA) for CAN ID
4 CANID_1 Digital input Ground (open) or 24 V (250 µA) for CAN ID
NOTE:
The old nozzle changer of the C&P20 head can not be used together with the CAN node NC
tape cutter module.
The nozzle changer with new control board can also be used in machines without the CAN
nodes.
Communication and Control
Position Measuring System Axis Control
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Communication and Control
129
4.4 Axis Control
4.4.1 Position Measuring System
4.4.1.1 Track Signals and Axis Zero Pulse Signal
Our Axes systems consists of the following parts.
Axis controller for main board
Servo amplifier
Motor
Position measuring system with Incremental- scale and -encoder
4-30: Principle circuit for position measuring systems
Legend
The axis control system with closed position control circuit determines the axis position directly,
based on the mechanical movement of the axis. The position measurement system generates analog
track and zero pulse signals during movement over the incremental scale. An amplifier, a frequency
multiplier circuit and a signal former are integrated into the amplifier housing. A test connector for digital
signals is either installed on the next interface board or the digital signals are measured at track A/B and
the zero pulse output of the SIPLACE AxisTester. The track signals are the only feedback loops in all
the axis control systems of the SIPLACE machine. This means that each track recognition error affects
the axis control system. The gantry axes immediately stop at a fault; the head axes finish the positioning
to target before showing a track signal error.
The position is determined by a position counter on the axis controller. The direction of axis movement
is determined by the phase shift of the two track signals An advanced track A signal indicates movement
to the right, while an advanced track B signal indicates movement to the left. To make the encoder
system robust for the high resolution we multiply the frequency of the analog signal and create a high
resolution digital measuring system.
1 Incremental scale with zero pulses 4 Electronic signal multiplication and signal
digitalization
2 Incremental encoder for track A / B and
Zeropulse signals (O-pulse.)
5 Test output digital signals
3 Analog signal output and amplifier 6 Axis controller
Communication and Control
Axis Control Position Measuring System
Student Guide (FSE) SIPLACE X Series and X4I
Communication and Control Edition 01/2009 EN
130
4-31: Principle signal multiplication at analog Track signals of a gantry axis
Legend
The signal multiplication can be realized as a Schmitt trigger action. During comparison of the analog
and digital axis signals, a signal multiplication of 25 (see diagram above), 10 or just 1 can be recognized.
The track signals for the C&P axes can only be measured as digital signals. The analog signals are
directly converted in the transmitter housing, without provision of a test connection for the analog signals.
1 Analog track A signal incremental encoder 4 Digital track B signal at Test connector
2 Analog track B signal incremental encoder 5 Analog track signal period
3 Digital track A signal at Test connector 6 Period time of digital track signal