00197463-03_SM_CPP_Customer_EN.pdf - 第20页

2 Overview of the Modules 2.1 CPP Head 20 Service Manual SIPLACE Multistar (CPP / CPP M) 02/2018 2.1.4.1 Component Sensor Functions Fig.9: Component sensor function (example of C&P20P used) 1. Downwards (top diagram…

2 Overview of the Modules

2.1 CPP Head

Service Manual SIPLACE Multistar (CPP / CPP M) 02/2018 19

2.1.3 Retract unit

Fig.7: Return unit

1. Pneumatic cylinder

2. Solenoid valve

3. Compressed air connection

4. Z axis driver

The return unit is fixed to the Z axis. This return 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 return unit is not a spare part and can only be

replaced together with the complete front plate of the

head.

2.1.4 CO sensor

Fig.8: Component sensor (example of C&P20P shown)

1. Power/data supply connector

2. Fixture to head housing

(2x centering pins, 2x screws)

3. Laser beam

4. Transmitter and receiver unit with protected

prisms

2 Overview of the Modules

2.1 CPP Head

20 Service Manual SIPLACE Multistar (CPP / CPP M) 02/2018

2.1.4.1 Component Sensor Functions

Fig.9: Component sensor function (example of C&P20P used)

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 up-

wards and downwards movement.

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 with 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 be issued and the component will be rejected and

sent via the repair cycle, as it will not be placed.

When the Z axis moves upwards again, the laser beam is released and the Z position recorded.

Based on the Z position during downwards movement, the system can now determine the pres-

ence and height of a component.

Placement process:

During the placement process, the system checks whether the component is on 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.

2 Overview of the Modules

2.1 CPP Head

Service Manual SIPLACE Multistar (CPP / CPP M) 02/2018 21

2.1.5 Holding circuit, screwed joint and silencer

Overview

Fig.10: Screwed joint and holding circuit with two-part silencer –

up to version 04

1. Compressed air inlet 4.5bar on the screwed joint

2. Retaining clips for silencer

3. Inner holes:

Venturi nozzle inlet (compressed air)

Outer holes: vacuum to the DP segments.

4. Fixture of holding circuit to star carrier

(sixscrews)

5. Holding circuit housing (plastic)

6. Two-part silencer

7. Fixture nut for the screwed joint

8. Screwed joint

Fig.11: Screwed joint and holding circuit with one-part silencer

– from version 05 (retroactively compatible)

1. Screwed joint and holding circuit housing with

one-part silencer

2. Individual screwed joint

3. Compressed air inlet 4.5bar on the screwed joint

4. Ground connection of screwed joint to the front

plate

5. Collector ring cover

6. Holding circuit housing (plastic) with one-part si-

lencer

7. Fixture nut for the screwed joint

Holding circuit

The holding circuit consists of a venturi block with two small venturi nozzles, the silencer and a

connection for the compressed air.

The compressed air inlet feeds the compressed air (min. 4.5bar) via the valves to the venturi

nozzles. Each venturi nozzle supplies a DP drive with vacuum in the holding circuit.

Depending on the head version used, there will either be a two-part or one-part holding circuit fit-

ted.

Screwed joint

The screwed joint is screwed into the holding circuit. The screwed joint is used to ensure the com-

pressed air supply to the valve terminal and to the holding circuit.

In addition, the screwed joint is fitted with a collector ring which serves as potential equalization

between the stationary and the rotating part of the placement head.

Silencer

The exhaust air from the venturi nozzles is sent via the silencer.

There are two versions of the silencer:

●

From version: one-part, together with the holding circuit

●

Up to version 04: two-part