00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN.pdf - 第114页
Communication and Control Position Measuring System Axis Control Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 114 The powe r connectio n has 2 pins for selectio n of the s uitable C AN ID. This depends on the positi…
Communication and Control
CAN Bus Tape Cutter and Nozzle Changer - Communication
113 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
Based on the cables connected and the position of the DIP switch, the CAN processor detects which
functions are to be controlled and at which location each assembly is.
LEDs - meanings
Cable assignment at connector X1
CAN node NC tape cutter module
1. X1 – Energy supply with automatic CAN ID
2. X2 – Energy supply, tape cutter +24 V/+5 V
3. X3 – Reject bin (nozzles, components)
4. X4 – CAN bus connection
5. X5 – Energy supply to valve (left)
6. X6 – Energy supply to valve (right)
7. X7 – Proximity switch for stroke cylinder in (left)
8. X8 – Proximity switch for stroke cylinder out (left)
9. X9 – Proximity switch for stroke cylinder in (right)
10. X10 – Proximity switch for stroke cylinder out (right)
11. X11– Test connector, tape cutter
12. X12 – Compressed air valve (additional pneumatic
unit for rejecting components)
13. X13 – Nozzle changer, row 1
14. X14 – Nozzle changer, row 2
15. DIP switch group S3
DIP switch 3
1 ON: CAN ID DIP switch 2/3 – OFF: Cable select
2 CAN -ID 0 ON: 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
Communication and Control
Position Measuring System Axis Control
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 114
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.
Axis Control
4.4 Axis Control
Position Measuri ng System
4.4.1 Position Measuring System
Track Signals and Axis Zero Pulse Signal
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
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.
NOTICE
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.
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
115 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
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.
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.
Zero Pulse at the Track Sign al Encoder
4.4.1.2 Zero Pulse at the Track Signal Encoder
Each incremental encoder system needs initializing. This means a reference run is performed for each
axis. During the reference run, each axis searches for a certain point, the zero pulse. The zero pulse is
an analog signal which is digitized by a ’Schmitt Trigger’ circuit.
When this fiducial is passed over (zero pulse) on the incremental measuring system, a zero pulse signal
is issued. This is an analog signal (1).
(Measurement of analog signal by setting the zero line at the center of the screen)
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