00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN.pdf - 第215页

C&P20A Overview Parts Overview with Function Description 215 Student Guide SIPLACE X-Serie and X4I SW70x (AL2) Z Drive Function Z Drive Function Retract Unit 7.2.3.3 Retract Unit Retract unit functions At zero curren…

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C&P20A
Parts Overview with Function Description Overview
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 214
Pressure Control Valve - Function
Pressure Control Valve - Function
Z Axis
7.2.3.2 Z Axis
Legend
A : Piston setting for max. vacuum during pickup
B : Piston setting for air blast during placement
1. Compressed air inlet
2. Venturi nozzle
3. Vacuum or air blast outlet, depending on piston
setting
4. Pistons
5. Motor
▪ After initialization, the piston is in a central position, in
which neither vacuum nor air blast is applied to the
nozzle.
▪ During pickup, the piston is always in the Open
position, so that maximum vacuum is generated and
is present at the nozzle. The switchover time
(pressure build up time) between max. vacuum of –
850 mbar to max. air blast of +200 mbar ≤ 12 ms.
▪ The function Early vacuum should always be
switched on for the CPx head. However, if this
function is switched off, the piston will be in the "open
position". The vacuum will only be switched on again
after the "light barrier down" signal has been issued .
-> 2 additional switching steps -> time loss.
Legend
1. Incremental measurement system, resolution 0.5 µm
2. Linear motor, primary part, moves up and down
between the secondary parts.
3. Light barrier Z-down emits the end position signal for
the Z axis.
4. Snap jaws: The ball bearing for the DP drive is
rotated via the star axis into the jaw, allowing the
segment to be moved upwards and downwards.
5. Z axis fixtures
The Z axis and retract unit are fixed to the head as a
complete unit, with two screws, and can be easily
replaced during service work.
C&P20A
Overview Parts Overview with Function Description
215 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
Z Drive Function
Z Drive Function
Retract Unit
7.2.3.3 Retract Unit
Retract unit functions
At zero current, the bearing friction of the Z axis is not sufficient to protect the axis from falling down. A
pneumatic retract system has been installed to protect the Z axis should the gantry be moved when the
machine is switched off. This retract unit keeps the Z axis in the safe, upper position during zero current.
Legend
1. Raceway
2. Segment
3. Ball bearings
4. Light barrier down
5. Snap jaws
▪ The jaws are installed on the primary part of the Z
motor, for mechanical docking of the segments.
▪ A Z down sensor is located in the placement position,
for recognition of the Z axis put down position. This
recognizes a relative movement between the nozzle
and DP segment. When the Z axis springs into place,
this sensor sends a signal to the axis controller board.
The "light barrier down" signal is directly linked to the
measurement signal of the Z axis incremental
encoder.
Legend
1. Pneumatic cylinder
2. Solenoid valve
3. Compressed air connection
4. Retract unit fixtures
5. Z axis driver
The retract unit is installed on the Z axis and is
responsible for protecting the Z axis from damage, by
moving it into a safe area in the case of unexpected
events e.g. power cuts or machine shutdown.
The retract unit is fixed with two screws and can be easily
replaced during service work.
C&P20A
Parts Overview with Function Description Overview
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 216
Component Sensor
7.2.3.4 Component Sensor
The component sensor is a standard feature on the C&P20A head and no longer an option as in the DLM
heads. Also, the function and position of the component sensor is different to that for the DLM heads.
The component sensor is in the pickup/place position and the Z axis moves during the upwards and
downwards movement of the laser beam. If the laser beam is interrupted or when it is released again,
the exact Z axis position is read out and the corresponding evaluation started.
(Before pick up: no component on the nozzle, after Pick up: component on the nozzle;
placement: component still on the nozzle, after placement: no component on the nozzle)
NOTICE
The Z axis control system is designed to ensure that, should the machine power supply fail (or
be switched off), there is always enough power temporarily stored by the Z motor servo unit and
axis controller board to move the Z axis to the upper position.
Power failure is recognized by the issuance of a "Power fail" signal. This "Power fail" signal
enables the relevant function (upwards movement and activation of the retract unit) on the axis
controller board.
Component sensor
▪ The component sensor is installed in the pickup-
placement position on the C&P20A head, by default.
▪ The sensor is fixed to the head with two screws and
can be replaced as a complete unit during service
work.
Legend
1. Power/data supply cable
2. Transmitter and receiver unit
3. Laser beam
4. Fixture to housing