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C&P20A Parts Overview with Function Description Overview Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 214 Pressure Control Valve - Function Pressure Control Valve - Function Z Axis 7.2.3.2 Z Axis Legend A : Pist…

C&P20A

Overview Parts Overview with Function Description

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

Parts Ov erview w ith Function Desc ription

7.2.3 Parts Overview with Function Description

Pressure Control Valve

7.2.3.1 Pressure Control Valve

C&P20A function units

C&P20A parts

This section describes the main parts of the C&P20A

head and their technical function.

The description is ordered according to the sequence of

disassembly for servicing.

Legend

1. C&P20A assembly

2. E/D transformer

3. Vacuum generator for placement circuit

4. Pneumatic retract unit

5. Z drive

6. Component sensor

7. Star motor

8. Intermediate distributor board

9. Raceway

10. DP drive

11. Component camera

12. Silencer holding circuit

Pressure control valve (digital)

▪ The pressure control valve supplies the pickup/

placement circuit with vacuum during the pickup

process and switches over to air blast during

placement.

▪ The pressure control valve is fixed to the placement

head with two screws and can be replaced during

service work.

Legend

1. Compressed air connection

2. Vacuum/air blast for pickup/placement circuit

3. Discharged air for cooling the X-linear motor (SX4

and X series machines only).

4. Energy and data supply

5. Pressure control valve fixture

C&P20A

Parts Overview with Function Description Overview

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 214

Pressure Control Valve - Function

Z Axis

7.2.3.2 Z Axis

Legend

A : Piston setting for max. vacuum during pickup

B : Piston setting for air blast during placement

1. Compressed air inlet

2. Venturi nozzle

3. Vacuum or air blast outlet, depending on piston

setting

4. Pistons

5. Motor

▪ After initialization, the piston is in a central position, in

which neither vacuum nor air blast is applied to the

nozzle.

▪ During pickup, the piston is always in the Open

position, so that maximum vacuum is generated and

is present at the nozzle. The switchover time

(pressure build up time) between max. vacuum of –

850 mbar to max. air blast of +200 mbar ≤ 12 ms.

▪ The function Early vacuum should always be

switched on for the CPx head. However, if this

function is switched off, the piston will be in the "open

position". The vacuum will only be switched on again

after the "light barrier down" signal has been issued .

-> 2 additional switching steps -> time loss.

Legend

1. Incremental measurement system, resolution 0.5 µm

2. Linear motor, primary part, moves up and down

between the secondary parts.

3. Light barrier Z-down emits the end position signal for

the Z axis.

4. Snap jaws: 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.

5. Z axis fixtures

The Z axis and retract unit are fixed to the head as a

complete unit, with two screws, and can be easily

replaced during service work.

C&P20A

Overview Parts Overview with Function Description

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

Z Drive Function

Retract Unit

7.2.3.3 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, upper position during zero current.

Legend

1. Raceway

2. Segment

3. Ball bearings

4. Light barrier down

5. Snap jaws

▪ The jaws are installed on the primary part of the Z

motor, for mechanical docking of the segments.

▪ A Z down sensor is located in the placement position,

for recognition of the Z axis put down position. This

recognizes a relative movement between the nozzle

and DP segment. When the Z axis springs into place,

this sensor sends a signal to the axis controller board.

The "light barrier down" signal is directly linked to the

measurement signal of the Z axis incremental

encoder.

Legend

1. Pneumatic cylinder

2. Solenoid valve

3. Compressed air connection

4. Retract unit fixtures

5. Z axis driver

The retract unit is installed on the Z axis and is

responsible 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 easily

replaced during service work.