00198168-02_Technical_Training_TX-Series_EN.pdf - 第57页
5 Placement Heads 5.1 CPP Head Technical Training SIPLACE TX-Series 10/2016 57 5.1.2.7 Front Plate 1. Front plate 2. Return cylinder 3. Z Axis with jaws and measuring system Raceway 4. Fixture for pressure control valve …
5 Placement Heads
5.1 CPP Head
56 Technical Training SIPLACE TX-Series 10/2016
5.1.2.5 Intermediate Distributor
The intermediate distributor consists of two boards:
1. Intermediate distributor 1 is fitted to the
front of the head
2. Intermediate distributor 2 is fitted to the left
side of the head. For contactless energy
transmission an additional board is
plugged onto the intermediate distributor
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LEDs show the operating voltages at the head and the state of the sensors.
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Test connector for the track signals and test pins for analog signals.
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Controlled power supply for incremental encoder from Z and star drive.
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Interface for component sensor, vacuum unit, holding circuit vacuum sensor and EEPROM.
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Startup control for the return cylinder.
5.1.2.6 Vacuum Valve Board
Valve Board details
1. Control valve for each segment
2. Vacuum or air kiss outer channels
3. Holding circuit input
4. The holding circuit measuring position
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The valve board consists of twelve solenoid control valves (1), one for each segment.
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The compressed air from holding circuit input (2) will be distributed into twelve segments.
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In each channel there is a valve (1) which can open and close the compressed air of each
segment independently (3), after a placement the valve will switch OFF the compressed air for
this segment. Before pick up the valve will switch ON the compressed air and generate
vacuum.
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Via the outer channels (4) we can measure the open and closed vacuum of the holding circuit.
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In the 6 o`clock position the pick up and placement circuit is supplied with vacuum or air kiss
from the vacuum generator.
5 Placement Heads
5.1 CPP Head
Technical Training SIPLACE TX-Series 10/2016 57
5.1.2.7 Front Plate
1. Front plate
2. Return cylinder
3. Z Axis with jaws and measuring system
Raceway
4. Fixture for pressure control valve
5. Fixture for pressure regulator valve
Front plate
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The front plate of the CPP head is fixed to the head frame with four screws and needs to be
removed as a whole unit for service purposes.
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With the exception of the PRV do not dismantle any other part from the front plate, as all parts
are specially aligned and cannot be adjusted in the field.
5.1.2.8 Component Sensor
1. Power/data supply connector
2. Transmitter and receiver unit
3. Laser beam
4. Fixture to head casing
(2x centering pins, 2x screws)
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Each CPP Head is fitted with a component sensor in the pickup/place position.
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This component sensor monitors the presence and/or component height after pickup and
before placement.
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The sensor is fixed to the head with two screws and can be replaced as a complete unit
during service work.
1. Reading out the Z position, if the
laser beam is interrupted (top
diagram) or has been released
again (bottom diagram)
2. Nozzle
3. Downwards (top diagram) or
upwards (bottom diagram)
movement
4. Component
The component sensor signal is directly linked to the axis controller (measurement system) of the
Z Axis. This enables the reading of the Z position during upwards and downwards movement.
5 Placement Heads
5.1 CPP Head
58 Technical Training SIPLACE TX-Series 10/2016
5.1.2.9 Retract Unit
1. Compressed air connection
2. Solenoid valve
3. Pneumatic cylinder
4. Actuator to move the Z Axis driver
Retract unit Functions:
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At zero current, the bearing friction of the Z Axis is not sufficient to protect the axis from falling
down. The pneumatic retract unit keeps the Z Axis in the safe, upper position during zero
current.
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The Z Axis control system is designed to ensure that there is always enough power
temporarily stored by the Z motor controller board (MHCU) to move the Z Axis to the upper
position.
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Power failure is recognized by the issuance of a "Power fail" signal. This "Power fail" signal
enables upwards movement of Z Axis and activation of the retract unit on the axis controller
board (MHCU).
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The retract unit is not a spare part and can change only with the front plate as a complete unit.
5.1.2.10 Z Axis
1. Raceway
2. Front plate
3. Z motor, primary part
4. Z motor, secondary part
5. Snap jaws
6. Linear guidance Z Axis
7. Support roller
8. Incremental measurement system
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3 phase linear motor for Z drive.
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The jaws are installed on the secondary part of the Z Motor.
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Secondary part (magnets) of the motor is moveable while the primary part is fixed.
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The EEprom on the connector of the Z-drive stores the following data:
– Production data (manufacturer, serial number)
– Operating data (errors, travel cycles)
– Machine data (motor data, travel profiles, zero point correction, max. and min. position
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The measuring system has a resolution of 0.5 μm. The zero pulse is approx. 2 mm under the
top stop.