00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN.pdf - 第271页

Collect, Pick and Place Head (CPP) Overview Overview of Parts 271 Student Guide SIPLACE X-Serie and X4I SW70x (AL2) Retract un it 8.2.7.4 Retract unit Retract Un it Functions Retract Unit Functions At zero current, the b…

Collect, Pick and Place Head (CPP)

Overview of Parts Overview

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 270

▪ The front plate with the Z-drive, jaw, race way and retract unit is one spare part. It is not possible to

exchange any parts from the front plate, because exact adjustments are necessary which can only

be performed at the factory.

Z Drive Function

▪ The Z drive is a 3 phase linear motor. The moveable part (magnets) is guided on the one side via

two linear guidances and, on the other side, through a support roller.

▪ The incremental measuring system is located on the side with the support roller.

▪ Each Z drive has an 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)

▪ The measuring system has a resolution of 0.5 µm. The zero pulse is approx. 2 mm under the top

stop.

▪ Servo amplifier for the Z axis SDS120/1.5Z2 with activation by A364. In SX machines the axes are

controlled via the HCU (Head Control Unit)

Legend

1. Z motor, primary part

2. Z motor, secondary part

3. Raceway

4. Support roller

5. Linear guidance Z axis

6. Snap jaws

Collect, Pick and Place Head (CPP)

Overview Overview of Parts

271 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)

Retract unit

8.2.7.4 Retract unit

Retract Un it Functions

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.

Component Sensor

8.2.7.5 Component Sensor

As a default, each CPP head is fitted with a component sensor in the pickup/place position.

This component sensor monitors the presence and/or component height after pickup and before

placement.

The sensor is fixed to the head with two screws and can be replaced as a complete unit during service

work.

Legend

1. Pneumatic cylinder

2. Solenoid valve

3. Compressed air connection

4. Z axis driver

The retract unit is fixed to the Z axis. This retract unit

keeps the Z axis in the safe, upper position during zero

current. This ensures that the placement head is not

damaged when the machine is switched off or in the

event of a power cut.

The retract unit is not a spare part and can only be

replaced together with the complete front plate of the

head.

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 of Z axis and activation of the retract unit)

on the axis controller board.

Legend

1. Power/data supply connector

2. Transmitter and receiver unit

3. Laser beam

4. Fixture to head casing

(2x centering pins, 2x screws)

Collect, Pick and Place Head (CPP)

Overview of Parts Overview

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 272

Component Sensor Functions

Pickup Process:

When the Z axis moves downwards, the nozzle interrupts the laser beam. At this exact moment, this Z

axis position is read out and compared to the reference value, from the height reference run, or from this

segment after placement. This determines whether there is still a component on the nozzle or not. If the

Z axis position indicates that there is a component on the nozzle, the Z axis will be immediately stopped.

An error message will appear or the component will be rejected and added to the repair cycle as not

placed.

When the Z axis moves upwards again, the laser beam is released and the Z position read out. 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 (Z downwards

movement) or whether placement has been performed on the component (Z upwards movement). As a

precaution, these Z positions are compared to those from the pickup procedure.

This ensures maximum pickup and placement reliability.

Legend

1. Downwards (top diagram) or upwards (bottom

diagram) movement

2. Nozzle

3. Component

4. Reading out the Z position, if the laser beam is

interrupted (top diagram) or has been released again

(bottom diagram).

The component sensor signal is directly linked to the axis

controller (measurement system) of the Z axis. This

enables you to read out the Z position during upwards

and downwards movement.