00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN - 第279页

Collect, Pick and Place Head (CPP) Overview Overview of Parts 279 Student Guide SIPLACE X-Serie and X4I SW70x (AL2) DP drive f unction DP drive function Measuring system function The measuring system consists of a glass …

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Collect, Pick and Place Head (CPP)
Overview of Parts Overview
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 278
Energy Transmission
Energy Transmission
▪ The energy transmission is done with the help of a split transformer. One part is located on the rear
cover of the CPP head (stator) and the other part (rotor) is fitted to the valve terminal.
▪ Both transformer sections have coils. A.C. voltage from the stator side induces a magnetic field in
the transformer core, which then generates a.c. voltage on the rotor side. This power is used to
supply the SCS and to control the DP drives.
▪ A voltage of 24V is transmitted.
DP drive
8.2.7.13 DP drive
▪ The DP drive is responsible for turning the nozzles into the correct pickup position and the
component into the correct placement position.
▪ Vacuum and air blast to the nozzle are provided via the motor shaft of the DP axis.
▪ The complete DP drive and the linear guidance can be replaced during service work.
Legend
1. Rotor
2. Stator
3. Coil (secondary side)
4. Coil (primary side)
5. Split transformer ferrite core
Legend
1. The connector is fitted and screwed to the SCS
control unit.
2. Motor
3. Fixture surface for screwing the linear guidance into
place
4. Vacuum connection
5. Measuring system
Resolution: 278 digits per degree or
100.000 digits per revolution
6. Camera background (black) for DP drive
7. Nozzle interface
Collect, Pick and Place Head (CPP)
Overview Overview of Parts
279 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)
DP drive f unction
DP drive function
Measuring system function
The measuring system consists of a glass disk with increments. This glass disk is fixed firmly to the motor
shaft.
The read unit evaluates, multiplies and digitalizes these increments. This actual position value is
continuously compared with the prescribed nominal value by the control circuit.
Light barrier down
Each DP drive has its own light barrier down sensor. When the Z axis springs into place, this sensor
sends a signal to the axis controller board or HCU. The "light barrier down" signal is directly linked to the
measurement signal of the Z axis incremental encoder.
Legend
1. Light barrier down
2. Measuring system
3. Cushioning path for operating the light barrier down
DP drive function
The DP drives are controlled by the SCS board, in
accordance with the counter pulse and nominal value
(pickup angle, placement angle and correction angle
after Vision).
The feedback about the position of the DC motor is
monitored by an incremental measuring system.
Collect, Pick and Place Head (CPP)
Overview of Parts Overview
Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 280
Star motor
8.2.7.14 Star motor
Star Motor Function
Star Motor Function
▪ The star motor is a brushless three-phase drive with sinus commutation.
▪ An optical measurement system is used for both commutation and recognition of the rotary angle.
This supplies the track signals A, B and the zero pulse. The incremental measuring system has
3600 increment lines and one reference fiducial. By a multiplication of 25, 1 digit = 0.004° or
250 digits = 1°.
▪ The motor is controlled with the help of these track signals. The actual position values are evaluated
on the controller assembly of the HCU (A364). The HCU power module (servo card) enhances
performance and is supplied with 2-phase current from the axis controller board. The third phase is
calculated automatically.
▪ The supply line to the star motor has a board with EEPROM, in which the following data is stored:
– Production data (manufacturer, serial number, ...)
– Operating data (errors, travel cycles, ...)
– Machine data (motor data, travel profiles, zero point correction, max. and min. position)
Legend
1. Stator star motor
2. Rotor star motor
Interface for fixing the star frame.
3. Incremental measuring system
4. Read unit incremental measuring system
▪ The star motor is a servo motor, in which the coil is
wound around the stator (1) and the magnets are
taken up by the rotor (2).
▪ The advantage of a torque motor is a much faster
reaction time coupled with a low lift (30° steps). The
motor functions contact free i.e. there is no wear and
tear.
▪ The head casing also serves as the motor casing.
▪ The star motor is not a spare part and can not be
replaced.