Công nghệ SMT máy DEK chức năng proflow ATX

Công nghệ SMT máy DEK chức năng proflow ATX Electrical Schematic PNEUMATIC Schematic Adjustments Settings Replacement Procedures CALIBRATIONS MAINTENANCE .......................... ..........................

(6 fl oz and 12 fl oz)

As the print carriage drives the system across the stencil, the constant system pressure and the enclosed design of the transfer head ensures minimum wastage and maximum environmental protection of the print medium

The detachable transfer head is available in both 300mm or 400mm

configurations; this provides effective coverage for different sized substrates,

as well as optimal print medium application

Figure 13-1 ProFlow Evolution ATx System Components

1 ProFlow ATx System Mount 2 ProFlow ATx Transfer Head Unit

2 1

ProFlow ATx Mount

Figure 13-2 ProFlow ATx System: Mount Components

The ProFlow ATx mount assembly attaches to the machine’s print carriage It features a pneumatically driven print medium delivery system, two adjustable transfer head mount brackets, and the vertical transfer head pin mount

3 Transfer Head Mount Bracket (2 positions) 8 Conditioning Grid Drive Cog

5 Mount Thumbscrew (2 positions) 10 Conditioning Grid Motor

3

4 5 6

7 3

Transfer Head Unit

Figure 13-3 Transfer Head Unit Components

2 Print Medium Pneumatic Cylinder (2 positions) 9 Front Wiper Blade

4 Print Medium Level Indicator Pin (2 positions) 11 Rear Wiper Blade

7 Archimedes Screw (internal component)

6

4 3

2 1

2 4

View On A

8

6 5

Figure 13-4 Transfer Head Unit Internal Components

2 Conditioning Grid

1 3

2

View on Rear with Cut-away Showing Crosshead Piston and Conditioning Grid

System Pressure The System Pressure is a programmable parameter that controls the contact

pressure of the transfer head against the stencil As the transfer head moves across the surface of the stencil, it must have enough downwards pressure to:

• Ensure that the side skis and wipers provide the enclosed environment which prevents any print medium leakage

• Allow the trailing wiper to remove the excess print medium from the surface

of the stencil during printing

The system pressure is maintained by a Z-axis stepper motor which lowers and raises the ProFlow ATx system Based on a preset parameter, the motor turns a leadscrew that precisely positions the transfer head’s wipers and skis against the stencil

NOTE

It is important for the transfer head to be aligned correctly as the system pressure is directed down through the centre of the transfer head.

ATx Movement (Y Axis)

Z-Axis System Pressure Down Through Centre of Transfer Head Unit

Transfer Head Unit

Print Medium

Print Medium

Pressure

Two pneumatically driven print medium pressure pistons are located on top of the transfer head; during conditioning and printing these pistons exert an even downwards force on the crosshead piston

As it presses down on the print medium, the seal on the crosshead printer flares out creating a pressurised environment within the conditioning chamber This flaring prevents any print medium from leaking past the seal

Figure 13-6 Print Medium Pressure Inside the Transfer Head

Direction of Print Carriage

Paste Pressure Piston

Paste Pressure Causes Flare

on Crosshead Piston Seal

Archimedes Screw Conditioning

Grid

Print Medium

Cross Section on Left Hand Side of Transfer Head

Crosshead Piston

Figure 13-7 Transfer Head Crosshead Piston Level Sensor

During the procedure, the print rails remain raised to support the transfer head, and system pressure is applied to the ProFlow ATx system to prevent any leakage The print medium pressure is reversed, which raises the crosshead piston and creates a void in the conditioning chamber

Pneumatic pressure is applied to the print medium cartridge to drive print medium to the head of the Archimedes screw which rotates for the pre-programmed amount of revolutions These actions deliver the print medium into the conditioning chamber, and the rotating conditioning grid prepares and distributes the print medium ready for application

View on Left Hand Side of Transfer Head

Crosshead Piston Level Sensor

Figure 13-8 Transfer Head Unit Status During Charging Action

Next, the Archimedes screw and conditioning grid stop rotating, the system pressure is relaxed, and print medium idle pressure is applied

The system is now ready to resume the print cycle

NOTE Charging and recharging the transfer head is an automatic process and requires no intervention from the machine operator.

Cross Section on Left Hand Side of Transfer Head

Paste Pressure Piston

Archimedes Screw Conditioning

Grid

Crosshead Piston System Pressure

Print Medium

Inlet Port

During the print process the rotation of the conditioning grid, working together with the print medium pressure, forces print medium into the apertures of the stencil

Figure 13-9 Print Medium Flow During Rolling Conditioning

Direction of Print Carriage

Print Medium

Cross Section on Left Hand Side of Transfer Head

Conditioning Grid

Transfer Head

Covers

The ProFlow ATx system ships with two cover options for the transfer head:

• Base Cover - Protects the wiper blades, skis and print medium during prolonged storage (more than one hour)

• Protective Cover - Provides protection to the wiper blades, skis and the operator during short-term operations, including fitting and removal

View on Front with Base Cover

View on Front with Protective Cover

Base Cover

Protective Cover

Locking Clips

View on Front (ProFlow ATx Mount not Shown)

Magnetic Tooling Pins

ProFlow Paste Pressure Regulator

Paste Pressure ON/OFF Paste Refill

Transfer Head Pistons

ADJUSTMENTS & SETTINGS

ADJUSTMENTS & SETTINGS

The transfer head fits between the and left hand and right hand mount brackets, which feature two spring-release thumbscrews

To adjust the mounts, carry out the following:

1 Turn the thumbscrew anti-clockwise until the thread is clear of the screw hole

2 Pull the thumbscrew away from the mount beam

3 Slide the mount bracket left or right along the mount beam until its position matches the width of the transfer head to be fitted

4 Release the thumbscrew so the thread engages in the screw hole

5 Turn the thumbscrew clockwise to secure the mount to the mount beam

NOTE

A size guide can be found on the left side of the mount assembly beam For more information on setting the transfer head size on the mount, see the section Replacement Procedures, Fitting the Transfer Head.

View On Front of Transfer Head

Left Thumbscrew Right Thumbscrew

Left Mount Bracket Right Mount Bracket

Adjusting the

Stencil Support

When the adjustable stencil support is in the closed position it is set 81mm; this dimension matches the height of the magnetic tooling pins To provide support for the stencil, the stencil support height must be increased by the thickness of the circuit board

To set the stencil support to the correct height, carry out the following:

1 Loosen the 7mm hexagonal securing nut

2 Slide the adjustable tooling top upwards to separate the tooling top from the tooling bottom

3 Position two of the circuit boards to be printed between the top and bottom faces of the stencil support

4 Readjust the tooling stencil support

5 Tighten the 7mm nut to secure the tooling top and bottom in position

6 Remove the two circuit boards

The support is now set to 81mm, plus the thickness of circuit board

NOTE For further information, refer to the Board Support Tooling chapter of the printer’s Technical Reference Manual.

81mm + Board

Adjustable Tooling Top

Adjustable Tooling Bottom

7mm Securing Nut

View on Front of Stencil Support

ADJUSTMENTS & SETTINGS

To configure the print medium low sensor beam, carry out the following:

1 Cut a view port into an empty print medium cartridge

2 Fit the empty print medium cartridge into the ProFlow ATx mount For more information on fitting a print medium cartridge, see Fitting the Print Medium Cartridge section of this manual

View on Front of ProFlow ATx Mount

Print Medium Low Sensor

Sensor Mount

Empty Print Medium Cartridge with View Port

View Port

3 Inspect the alignment of the LED beam.

View into Print Medium Cartridge Through the View Port

ADJUSTMENTS & SETTINGS

4 If required, adjust the LED sensor to centralise the LED beam on the print medium cartridge’s end plate:

5 If the LED beam appears above or below the Y plane, loosen the two Y plane adjustment screws using a 3mm Allen key and a 7mm spanner

6 Adjust the sensor until the LED beam sits on the Y plane

7 Tighten the Y plane adjustment screws

9 Adjust the sensor until LED beam sits on the Z plane

10 Tighten the Z plane adjustment screws

End View Into Empty Print Medium Cartridge

Configuring the

Print Medium

Demand Sensor

The print medium demand sensor detects when the level of the print medium

in the transfer head is low For an accurate reading, the bottom of the sensor must be positioned no more than 5mm (+/- 1mm) above the transfer head’s top plate

To adjust the height of the print medium demand sensor, carry out the following:

1 Loosen the screw on the print medium demand sensor, using a jeweller’s flat head screwdriver

2 Adjust the bottom edge of the demand sensor so that it sits 5mm (+/- 1mm) above the level of the transfer head’s top plate

3 Tighten the screw on the print medium demand sensor, using the jeweller’s flat head screwdriver

5mm +/- 1mm

View on Left Hand End of Transfer Head

Print Medium Demand Sensor

Adjustment Screw Top Plate

The base cover option is used for prolonged storage of the transfer head It protects the wiper blades and skis from damage, and protects the print medium from environment To fit the base cover, carry out the following:

1 Loosen the right hand side retaining screw and ease the dowelled side plate away from the base-plate of the cover; do not fully remove the side plate

2 Fit the base cover to the transfer head:

a Fit the left side of the base cover over the transfer head’s left hand side locator dowel

b Fit the right side of the base cover to the transfer head’s right hand side locator dowel

NOTE Apply pressure to squeeze the transfer head’s wiper blades and the base cover together; this action eases the fitting process.

Side Plate

Retaining Screw Base Cover

View on Front of Transfer Head and Base Cover

Right Hand Locator Dowel Left Hand

Locator Dowel

3 Tighten the base cover’s retaining screw to secure the right side plate firmly against the transfer head cover.

Separating the Base

Cover

To separate the base cover from the transfer head, carry out the following:

1 Loosen the retaining screw on the right hand side of the base cover; do not fully remove the screw

2 Pull the right hand end plate of the base cover away from the transfer head, but do not fully remove it; ensure the top of the right hand locator dowel remains tight against the base cover’s end plate

3 Slide the transfer head out of the base cover

NOTE

It is important to keep base cover’s right hand end plate in place This keeps the wiper blades in contract with the base cover; this action prevents the print medium from smearing during the separation process

View on Right End of Base Cover

1 Ensure the two locking clips on the protective cover are unlocked; they should be loose.

2 Fit the protective cover to the transfer head by inserting the locking pins into the two protective cover mounts located on the top of the transfer head

3 Flip the locking clips upwards to lock the protective cover in place

View on Front of Protective Cover and Transfer Head

Protective Cover Mounts

Protective Cover

Locking Clips (Shown in Unlocked Position)

View on Locking Clips

Do not unlock the locking pins prior to separation This keeps the wiper blades

in contract with the protective cover; this action prevents the print medium from smearing during the separation process.

To remove the squeegee mount, carry out the following:

1 Select Open Cover Commands

2 Select Carriage to Front

3 Select Back

4 Select Shut Down

5 Select Continue

6 Switch the mains isolator to OFF

7 Remove the squeegees, if fitted

8 Disconnect the four squeegee mechanism connectors from the print riage, left hand side:

car-• Rear Squeegee Motor

• Front Squeegee Motor

• Home Sensors

• Squeegee Pressure Amplifier

9 Loosen the four captive screws securing the squeegee mount mechanism

REPLACEMENT PROCEDURES

to the print carriage, using a 4mm Allen key

10 Carefully remove the squeegee mount

11 Remove the securing screw which attaches the drip tray to the actuator

Rear Squeegee Motor (9SK17)

Front Squeegee Motor (9SK16)

Home Sensors (9SK08)

Squeegee Pressure Amplifier (N3SK16)

Squeegee Mount

View on Front of Print Carriage

Home Sensors

Captive Screws (4 Positions)

View on Front of Print Carriage

12 Slide the drip tray off the bearing on the drip tray guide shaft

13 Remove the drip tray guide shaft, using a 6mm Allen key

Drip Tray

Drip Tray Guide Shaft

Securing Screw

Actuator Piston

NOTE The captive screws are hidden behind the components on the front of the mount assembly; they are never fully revealed.

View on Rear of ProFlow ATx Mount

Mount Plate

Captive Mount Screw (4 Positions)

Locator Dowel (2 Positions)

Z Axis Motor Wheel

3 Locate the two locator dowel holes on the front face of the print carriage

4 Fit the ProFlow ATx mount mechanism to the print carriage so that both locating dowels fit into the locator dowel holes

NOTE Ensure the cables and air feed lines are free from moving parts that may prevent the ProFlow ATx mount from being secured to the print carriage

5 Secure the ProFlow ATx mount to the print carriage; tighten the four captive screws on the mount plate, using a 4mm Allen key

6 Attach the drag chain carrying the left hand side cable and air feed tors to the left hand side of the print carriage

connec-Locator Dowel Holes

View on Front

Left Side Drag Chain Screw

REPLACEMENT PROCEDURES

7 Connect the following to the ProFlow ATx connectors on the left hand side

of the print carriage:

• Servo Power (9PL96)

• Print Medium Demand Sensor (9PL77)

• Print Medium Cartridge Air Feed

• ProFlow Home (9PL08)

• Z-axis Stepper Motor Power (9PL17)

• Print Medium Low Sensor (9PL61)

• ProFlow Present CAN (9PL99)

• Piston Down Air Feed

View on Print Carriage Left Side

Servo Power 9SK96

Print Medium Demand Sensor 9SK77

Print Medium Cartridge Air Feed

ProFlow Home 9SK08

Print Medium Low Sensor 9SK61

Piston Down Air Feed

Z-axis Stepper Motor Power 9SK17

ProFlow Present CAN 9SK99

8 Connect the drag chain carrying the right hand side connectors to the right hand side of the print carriage.

9 Connect the following to the ProFlow ATx connectors on the right hand side

of the print carriage

• Archimedes Screw Power (9PL100)

• Paste Load Feedback (9PL108)

• Piston Up Air Feed

View on Print Carriage Top Face

Right Side Drag Chain Screw

Paste Load Feedback (9SK108)

2 On the ProFlow ATx mount, unscrew the left hand side thumbscrew until the thread is released.

3 Pull on the left hand side thumbscrew until it is free from the mount hole

XXXmm

Ski

View On Front of Transfer Head

Left Thumbscrew Right Thumbscrew

Left Mount Bracket Right Mount Bracket

4 Slide the left hand side mount bracket until it is aligned with the correct hole for the size of the transfer head being used (for guidance on how to select the correct mount hole for the transfer head being installed, see the diagram below).

5 Release the thumbscrew to engage the thread into the mount hole

6 Tighten the thumbscrew to secure the mounting block to the beam

7 Unscrew the right hand side thumbscrew

8 Pull on the right hand side thumbscrew until it is free from the mount hole

9 Slide the right hand side mount bracket fully to the right so there is sufficient space to attach the transfer head; it is not necessary to tighten the right hand side thumbscrew at this stage

300 400

300 400

Transfer Head Size Scale on ProFlow ATx Mount Beam

Align Left Side Mount Bracket to Reveal Intended Transfer Head Size.

Example Set to400mm.

View on Mount Beam

Left Side of ProFlow ATx Mount Beam