Công nghệ SMT máy DEK sự chủ động proactiv

untitled PROACTIV™ OVERVIEW CHAPTER 10 PROACTIV™ OVERVIEW Introduction ProActiv™ is an active squeegee module The ProActiv mount assembly, which is similar to the standard squeegee mount and shares co.

CHAPTER 10 PROACTIV™

OVERVIEW

is similar to the standard squeegee mount and shares common functionality and construction, houses the active squeegees The difference is apparent when using ProActiv during a print stroke, the squeegee blade is activated, this provides additional forces in the print direction; it modifies the rheology of the solder paste increasing its fluidity

Figure 10-1 ProActiv Mechanism

• A squeegee mechanism

• Electronic control modules and associated wiring looms

• A pair of active squeegees (sizes available: 170/200/250/300mm with or

1 ProActiv Mount Assembly

2 Electrical Connector Bracket

3 Active Squeegees

3 1

2

Squeegee

Mechanism The squeegee mechanism houses a pair of motors, which lift and lower the squeegees Driving the squeegee down, onto the stencil, creates the print

pressure needed to force the paste through the stencil apertures The mechanism has an electrical bracket that houses the electrical connectors, switches and indicators, which are used to supply power and signals to the active squeegees

Active Squeegees The front and rear squeegees have active elements, which provide the motive

forces that are used to ‘work’ the paste

NOTE

1 Only use the original matched ProActiv squeegee pair, as supplied with the printer or as part of a machine upgrade Optimum performance may not be achieved if an alternative ProActiv squeegee pair is used Contact DEK customer support for assistance.

2 Handling active squeegees Do not mishandle or drop active squeegees This may cause damage to the active elements Always stow away securely.

Figure 10-2 Rear View of an Active Squeegee Assembly

The squeegee blades are mounted, as shown above, and secured to the mechanism by the mounting bar

Squeegee Blades Squeegee blades are available in sizes: 170,200,250 and 300mm blade widths

and two blade depths, either 6 or 15mm These measurements refer to the portion of the blade that is used to work the paste, as shown below The part number and width are engraved on each blade

Squeegee Blade Fixing Screws (in 14 positions)

Active Power and Signal Cable

Mounting Bar Squeegee Blade

size facing the front

Paste Deflectors Paste deflectors are available to deflect paste back to the centre of the blade

and prevent the formation of tramlines The deflectors are available for 170,200,250 and 300mm sized squeegee blades and are secured to either end

Securing Screws

2

3

3 2

M37SK10

N18PL13

Front ProActiv Squeegee

Front ProActiv Sensor

Rear ProActiv Sensor ProActiv Enable SW ProActiv Enable Indicator - Blue ProActiv Status Indicator - Green

Rear ProActiv Squeegee

N18PL04

N18PL05

N18PL08 N18PL01

M37 Power

Supply Enclosure

ELECTRICAL SCHEMATIC

the drive board, and the node board, are mounted on a DIN rail Power to the boards is derived from the M37 power enclosure

Active squeegee drive signals are generated on the drive board

The node board is used for routing signals from the driver to the switches and sensors

ELECTRICAL SCHEMATIC

carriage bearing support, on the left-hand-side of the printer The drive board generates the signals required to drive the active elements of the squeegees

Figure 10-3 Electronic Control Boards Located on the Printer L.H.S

Power comes from the M37 power supply enclosure, via plug N18SK01, supplies the following voltages: 42V, +24V SW, +24V US and +12V

Drive signals activate a squeegee via N18PL14 This cable divides to provide independent drive signals to the front and rear squeegees

switches, as follows:

Signals routed from the drive board to the node board across JP1:

• Enable and status indicatorsFeedback signals from the node board to the drive board across JP1:

• The system is ready to activate the squeegees (enable switch)

• A squeegee has moved from dwell to contact height or vice-versa (front and rear proximity sensors)

N18PL13

N18PL14

JP1

N18SK01 N18PL05 N18PL04

N18PL08

MECHANICAL DETAIL

MECHANICAL DETAIL

Figure 10-4 Front Active Squeegee

The active squeegees are fitted to the squeegee mechanism using the top mounted locking thumbscrews To prevent the squeegees from being fitted to the wrong holder each squeegee is constructed with a keyway and a pair of locking thumbscrews The thumbscrews on the rear squeegee have their hole-centres further apart than the hole-centres on the front squeegee The keyway aligns with the dowel pins on the squeegee holder

The integrated cables, shown as a stub in the figure above, connect each squeegee to the drive board via connectors on the mount assembly bracket (9SK74/75) The cables carry power and signals to drive the active elements

in each squeegee The cables are loomed through the drag chain back to the drive board to plug (N18PL14)

Proximity switches located above each squeegee are used to sense when the squeegee moves from dwell height to contact height This movement causes proximity switches to trigger, if ProActiv is on, the active drive to the squeegee blades turns ON The active squeegee remains on until it is: turned off by the operator, or the machine is powered down, or emergency stopped, or the squeegee returns to either the dwell position or the home position

ADJUSTMENTS AND SETTINGS

ADJUSTMENTS AND SETTINGS

This section details the adjustments and settings required to set up the active squeegee mechanism

Proximity Switch

2 With the printer in the ready page; select Maintenance.

3 Select Machine Setup.

4 Select Options.

5 Select Pressure Hardware; and select Fitted.

6 Navigate back to the Ready page.

7 Select Open Cover Commands.

8 Select Carriage To Front.

9 Open the front printhead cover

10 Remove the active squeegees

NOTE Handling active squeegees Do not mishandle or drop active squeegees This may cause damage to the active elements Always stow away securely.

Squeegee Pressure

Calibration A force meter calibration jig and a squeegee pressure plate are required to perform the squeegee pressure calibration.

NOTE The front squeegee mount (foot) has two mounting locations, the inner locations are for ProActiv, and the outer locations are for mounting the

ADJUSTMENTS AND SETTINGS

squeegee test jig

Foot Assemblies (showing the two squeegee mount locations)

Mount Locations for Pressure Test Jig or Standard Squeegee

Mount Locations for Standard Squeegee Mount Locations for the Front ProActiv Squeegee Assembly

Mount Locations for the Rear ProActiv Squeegee Assembly

ADJUSTMENTS AND SETTINGS

NOTE Ensure that the rising table print reference height is set correctly before commencing, (the calibration relies upon accurate positioning of the table to make a reference).

WARNING BOARD CLAMPS EXTREME CARE MUST BE EXERCISED WHEN WORKING IN THE TOOLING AREA OF THE MACHINE TO AVOID INJURY THE FOILS ON THE FRONT AND REAR BOARD CLAMPS ARE VERY SHARP.

1 Select Open Cover Commands.

2 Select Carriage To Rear.

3 Select Unload Screen.

4 Open the front printhead cover

5 Remove the screen from the machine

6 Remove the tooling from the tooling plate

7 Close the front printhead cover

8 Press the System button.

9 Select Back.

10 Select Maintenance.

11 Select Calibrations.

12 Select Pressure.

13 Select Calibrat Readings The rails are checked for the presence of a

board, the print carriage moves to the calibration position, the rear rail moves to home position, the table homes and the board clamps are closed

14 The machine cover is unlocked and the message ‘Fit the pressure

calibra-tion rig.’ is displayed with the following window:

15 Open the front printhead cover

16 Ensure that the calibration jig is secured to the mounting plate as shown in

CALIBRATION DATA Gain Factor 1.02

ADJUSTMENTS AND SETTINGS

the following graphic:

17 Fit the calibration jig to the front squeegee position using the outer mounting

Mounting Plate

Mounting Holes

Calibration Jig

A A

S S

ADJUSTMENTS AND SETTINGS

holes on the front foot assembly

18 Fit the squeegee pressure plate to the rising table ensuring that the locating dowels insert into the holes of the rising table

NOTE During the squeegee pressure calibration the dwell height of the rear squeegee is 15mm regardless of the set up value This height is set during calibration only.

19 Switch the force meter ON and check the reading is 0kg, (ensure the force

meter is not in contact with the squeegee pressure plate)

20 Select Continue.

21 The front squeegee mechanism steps down until a change in pressure is detected and continues stepping down until the pressure value stored on the

machine is reached If the calibration jig displays 10kg, go to Step 25.

22 Select Jog Rig.

23 Use the left and right jog buttons to move the front squeegee mechanism up

or down until the calibration jig displays 10kg.

View on Front of Rising Table and Squeegee Mechanism

Squeegee Pressure Plate

Locating Dowel(in 2 positions)

O OFF I ON

UNITS Zero

ADJUSTMENTS AND SETTINGS

played

27 Remove the calibration jig and the squeegee pressure plate from the

machine On completion select Yes, the table resets, the print carriage

moves to home position, board clamps open and the rear rail moves to the board width setting

ADJUSTMENTS AND SETTINGS

Active Squeegee

Reference Height This procedure sets the squeegee reference height to establish the correct print pressure

1 If a Ptest.dat file is not required, go to Step 7

2 Select Maintenance.

3 Select Test Cycles.

4 Select Data Logging On.

5 Select Back.

6 Select Back.

7 Select Setup Product.

8 Select Squeegees.

9 Select Unload Screen.

10 Open the front printhead cover

11 Remove the screen from the machine

12 Close the front printhead cover

13 Press the System button.

14 Select Calibrate Heights.

15 The message ‘Ensure that the correct squeegees are fitted!’ is

dis-played

16 Select Restore Defaults.

17 Fit the active squeegees to the front and rear squeegee mounts

NOTE Handling active squeegees Do not mishandle or drop active squeegees This may cause damage to the active elements Always stow away securely.

18 Select Continue.

19 Select Continue.

20 The following machine sequence is carried out:

a The presence of a board, on the rails, is checked

b The rising table drives to print height

c The board clamps are closed

d The print carriage drives the front squeegee over the front rail

e The rear squeegee moves to dwell height

ADJUSTMENTS AND SETTINGS

h The system records the pressure and the number of steps (that the motor took to get to this position)

i The stepper motor drives down another 15 steps; this is recorded with the pressure detected This is repeated a further 18 times to achieve 20 results

21 The rear squeegee is calibrated in a similar manner

22 The message ‘Calibrate Squeegee heights complete’ is displayed.

23 Select Back.

24 Select Back.

25 Select Maintenance.

26 Select Test Cycles.

27 Select Data Logging Off.

28 Select Back.

29 Select Back.

ADJUSTMENTS AND SETTINGS

Ptest.dat File The file displays 20 front squeegee readings followed by 20 rear squeegee

readings, showing the relationship between steps, displacement and pressure applied From the readings taken, the front and rear pressure factors and squeegee reference heights are calculated At the end of the file, five readings

of flood pressure and reference height readings are displayed (these are also listed in the Config.txt file)

The Ptest.dat file is located on the hard drive of the machine PC To view the file carry out the following procedure:

1 From the Windows start menu, select Programs

2 Select Accessories.

3 Select Windows Explorer.

4 Under My Computer, locate and open the E:\Log\Ptest.dat file.

The figure below gives a representation of the Ptest.dat file

(steps) (kg) Rear Squeegee

4211.000000 4196.000000 4181.000000 4166.000000 4151.000000 4136.000000 4121.000000 4106.000000 4091.000000 4076.000000 4061.000000 4046.000000 4031.000000 4016.000000

19.640694 19.182706 18.724719 18.266732 17.747680 17.289692 17.801172 16.343185 15.885198 15.396678 14.908158 14.480703 13.992184 13.564729

Front Squeegee (steps) (kg)

4039.000000

21.930630 21.472643 21.045188 20.587201 20.129213 19.640694 19.213239 18.694187 18.266732 17.839277 17.350757 16.892770 16.465315 16.007328 15.579873 15.121886 14.724963 14.236444 13.778456

4309.000000 4294.000000 4279.000000 4264.000000 4249.000000 4234.000000 4219.000000 4204.000000 4189.000000 4174.000000 4159.000000 4144.000000 4129.000000 4114.000000 4099.000000 4084.000000 4069.000000 4054.000000

NOTE Text shown in italics is not displayed in the Ptest.dat file.

ADJUSTMENTS AND SETTINGS

Setting the

Proximity Switches Ensure that squeegee pressure and squeegee reference height calibrations have been completed before proceeding

1 Select Setup Product, Squeegees.

2 Ensure that Dwell Height is set to the default value of 30.

3 Select Maintenance.

4 Select Diagnostics.

5 Select the Squeegee Module from the list.

6 Drive the front squeegee to Dwell Height.

7 Select Drive Front Squeegee Using Jog Buttons.

8 Drive the squeegee down by approximately 2mm.

9 Use a flat bladed trimmer to adjust the front squeegee proximity sensor

until the sensor light is OFF.

10 Drive the squeegee back to Dwell Height; ensure the light is ON.

11 Repeat step 6; ensure the light is OFF.

12 Repeat steps 3 through 9 for the rear squeegee

Figure 10-5 The Warning Label as Fitted to the Active Squeegee Set

WARNING!

Squeegee Drip tray MUST be removed when using ProActiv

with Standard Squeegees

ATTENTION!

Le plateau sous racles DOIT ętre retiré quand

Le plateau sous racles DOIT ętre retiré quand les racles ProActivsont utilisées Le plateau sous racles ne peut ętre utilisé

qu'avec des racles standard

REPLACEMENT PROCEDURES

This procedure details the fitment of the ProActiv unit to the printer

1 From the Ready page select Open Cover Commands.

2 Select Move Carriage to Front.

3 Navigate back to the Ready page

4 Select Shut Down.

5 Select Confirm.

6 Turn the mains isolator to the OFF position.

7 Open the printer front cover

8 Remove the stencil

9 Remove any applicator modules fitted to the printhead mechanism; refer to the relevant chapter of this manual or the module’s stand alone manual

NOTE The ProActiv option cannot be used if a Paste Drip Tray is fitted to the printer Remove the paste drip tray before fitting ProActiv active squeegee module to the printer Do not attempt to fit a paste drip tray to a printer which has a ProActiv module fitted.

10 Place a board over the rails at the tooling area; this is used to support the squeegee mechanism

11 Place the squeegee mechanism on the board

12 On the squeegee mechanism, connect the four spade connectors to the enable switch /indicator and the two spade connectors to the status indicator

REPLACEMENT PROCEDURES

from N18PL08 (6) and N18PL05 (2) as follows:

Enable switch/indicator

• Grey lead to Pin 1

• Violet lead to Pin 2

• No connection Pin 3

• No connection Pin 4

• Red lead to Pin 5 (marked +).

• Black lead to Pin 6 (marked -).

Status indicator

• Brown lead to Pin 1 (Identified by the red dot on the indicator body.)

• White lead to Pin 2

13 Carefully position the rear of the ProActiv squeegee mechanism (spring beam assembly) into the print carriage so that both printhead mechanism

5

6

3

2 1

4 2

1 Status

Status

Enable Enable

Enable Enable

Enable Status Enable Status