SiplaceX4_en.pdf - 第377页

1 - 1 1 S tudent Guide SIPLACE X Edition 09/2005 8 Collect&Place-Head 20 11 8.1.3.5 St ar The mechanical collector ring consist s of a stati onary and a rotary p art. The 6 sliding contact s transmit direct voltage (…

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Student Guide SIPLACE X
8 Collect&Place-Head 20 Edition 09/2005
10
Pickup Process:
– When the Z-axis moves downwards, the nozzle interrupts the Laser beam.At this exact mo-
ment, the Z-axis position is recorded and compared to the reference value, to see whether
there is still a component on the nozzle. If the Z-axis position indicates that there is a compo-
nent on the nozzle, the Z-axis will be immediately stopped. An error message will be issued
or the component will be rejected.
– When the Z-axis moves upwards again, the Laser beam is released and the Z-position re-
corded. Based on the Z-position during downwards movement, the system can now determine
the presence and height of a component.
Placement Process:
– During the placement process, the system checks whether the component is at the nozzle/
whether placement has been performed on the component.
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3
2
4
Component Sensor
– In its standard state, the component sensor is
installed in the pickup-placement position on
the C&P20 head.
– The sensor is fixed to the head with two
screws and can be replaced as a complete
unit during service work.
Component Sensor Details
– Power/data supply cable (1)
– Transmitter and receiver unit (2)
– LASER beam
(3)
– Mounting (4) to housing
Component
Nozzle
Recording of Z-
position when the
LASER beam is
interrupted
Downwards movement
Component
Nozzle
Upwards movement
Recording of Z-position
when the LASER beam is
free again
Component Sensor Functions
– The component sensor determines the com-
ponent and nozzle height during the place-
ment process.
– The component sensor signal is directly
linked to the measurement signal of the Z-
axis incremental encoder.
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Student Guide SIPLACE X
Edition 09/2005 8 Collect&Place-Head 20
11
8.1.3.5 Star
The mechanical collector ring consists of a stationary and a rotary part. The 6 sliding contacts
transmit direct voltage (24V/4A), ground and the CAN bus signals (CAN high, CAN low).This E/D
transmitter (Energy/Data Transmitter) can be replaced during service work.
Star carrier 03005117-0x / collector ring (E/D transmitter) 03007834-0x
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3
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4
Star axis
The star consists of the star assembly, on which all
20 DP drives are mounted, the motherboard and the
collector ring.
This complete unit is fixed to the motor shaft with
three screws and can be removed for service work
after the raceway has been dismounted.
Star Details
Motor shaft (1)
Star assembly (2)
Screws (3) mounting the star unit to the motor shaft
Smoothed distributor disc
(4)
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3
2
4
5
Star assembly
The collector ring (1) is located above the star and
supplies the DP drives
(3) with power and data.
The motherboard is located behind the control
boards
(2) of the DP drives and is responsible for
controlling and positioning the DP drives.
The control board is plugged into the mother-
board and is fixed via the two brackets
(4).
Two screws fix the complete DP drive unit from
inside, to the star frame.
An index screw
(5) ensures that the ED trans-
former is correctly positioned during assembly.
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Student Guide SIPLACE X
8 Collect&Place-Head 20 Edition 09/2005
12
8.1.3.6 DP-Drive
Measurement System with Hall Sensors – Function:
The sensor detects the movement of ferromagnetic material (toothed wheel) through changes to
the magnetic flow.
If one element is opposite a ferromagnetic tooth and another opposite a gap, this causes a one-
sided increase in induction.
The difference arising between the two elements alters the polarity once the toothed wheel moves.
This change is evaluated, digitized and used to address or give feedback in closed-loop control.
The skilled arramgement of the position encoder make one solely Zero position on the DP-Drive.
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3
2
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DP Axis
– The DP axis is responsible for turning the compo-
nent into the correct placement position within a set
time. The hollow designed shaft of the DP axis pro-
vides vacuum and air kiss to the nozzle.
– The complete DP drive can be replaced during work.
DP Drive Details
– Control board (1) for DP motor
– Motor
(2)
– Linear guide (3) Z-axis
– Vacuum connection
(4)
– Position encoder system
(5) with resolution of 72 digits/°
– Collar (trigger ring for light barrier bottom)
(6)
– Filter disc
(7)
gear
Power
supply
Hall sensor
0V GND
Output
Load
DP Drive - Function
The DP drives are controlled by the DP
master, in accordance with the counter
pulse and set value (pickup angle, place-
ment angle and correction angle after Vi-
sion).
The DC motor is monitored by a measure-
ment system attached to the motor axis.