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1 - 8 S tudent Guide SIPLACE X 8 Collect&Place-Head 20 Edition 09/2005 8 8.1.3.2 Z-Drive Description Part No: Z-Drive 03005155-0 X Z-Motor 03005183-0 X Light barrier "Z- Axis bottom" 03007833-0 X 1 1 4 4 3 …
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Student Guide SIPLACE X
Edition 09/2005 8 Collect&Place-Head 20
7
8.1.3.1 Vacuum generator
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Vacuum generator (digital)
– The pressure control valve supplies the pickup
/
placement circuit with vacuum during the pickup
process and switches over to air kiss during
placement.
– This valve is fixed to the placement head with
two screws and can be replaced during service
work.
Vacuum generator Details
– Compressed air connection (1)
– Vacuum/air kiss (2) for pickup/placement circuit
– Discharged air
(3), for cooling the X linear motor
– Energy and data supply
(4)
– Mounting (5) for vacuum generator
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2
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Vacuum generator - Function
– After initialization, the piston is in a “central posi-
tion”, in which neither vacuum nor air kiss is ap-
plied to the nozzle.
– During pickup, the piston is always in the ‘open’
position, in which maximum vacuum is produced
and applied to the nozzle.
– The function “early vacuum” should always be
switched on for the C&P20 head.However, if this
function is switched off, the piston will start off by
being in the ‘open’ position and will then return to
the “central position” . The vacuum will only be
switched on again after the "light barrier down"
signal has been issued . -> 2 additional switching
steps -> time loss.
Vacuum generator Details
– Compressed air (1)
– Piston (2)
– Motor (3)
– Venturi nozzle (4)
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Student Guide SIPLACE X
8 Collect&Place-Head 20 Edition 09/2005
8
8.1.3.2 Z-Drive
Description Part No:
Z-Drive
03005155-0X
Z-Motor
03005183-0X
Light barrier "Z- Axis bottom"
03007833-0X
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5
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Z-Axis
– The Z-axis and retract unit are fixed to the head as a
complete unit, with two screws, and can be easily re-
placed during service work.
Z-Axis Unit Details
– Incremental measurement system (1) resolution
0,5µm.
– Linear motor, primary part
(2) moves between the
secondary parts up and down.
– Light barrier Z-down
(3) emits the end position sig-
nal for the Z-axis.
–Jaw
(4). 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.
– Mounting
(5) for Z-axis
Segment
ball bearings
Segment
Raceway
Jaw
Raceway
Light barrier
Z-down
Z-Drive - Function
– The jaws are installed on the primary part of
the Z-motor, for mechanical docking of the
segments.
– A Z-bottom sensor is located in the place-
ment position, for recognition of the Z-axis
put-on position. This recognizes a relative
movement between the nozzle and DP seg-
ment. When the Z-axis springs into place, this
sensor sends a signal to the axis card.The
"light barrier down" signal is directly linked to
the measurement signal of the Z-axis incre-
mental encoder.
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Student Guide SIPLACE X
Edition 09/2005 8 Collect&Place-Head 20
9
8.1.3.3 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, up-
per position during zero current.
Please Note: 8
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
card 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.
8.1.3.4 Component Sensor
The component sensor is no longer a option like the 6/12 C&P head. Also the function and position
of the component sensor is different. The component sensor is mounted directly in the placement
and pick up position, so that we recognize the component after pick up and before placement. The
Z-Axis moves downwards and upwards trough the Laser beam.
When the Laser beam is interrupted or relaesed the exactly Z-position is recording by the axis
card. So we determined in each situation if a component on the nozzle or not.
(Before Pick up: No Component on the nozzle, After Pick up: Component on the nozzle; Before
Placement: Component still on the nozzle, After placement: No Component on the nozzle)
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Retract unit
The retract unit is installed on the Z-axis and is respon-
sible 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 eas-
ily replaced during service work.
Retract unit Details
Pneumatic cylinder (1)
Solenoid valve (2)
Compressed air connection (3)
Mounting of retract unit (4)
Z-axis driver (5)