Công nghệ SMT máy DEK mô đun squeegee module OVERVIEW Squeegee Drip Tray ELECTRICAL SCHEMATIC REPLACEMENT PROCEDURES ProFlow to Squeegees Drive Belt Replacement Fitting the Squeegees CALIBRATIONS Squeegee Pressure Calibration Squeegee Reference Height (Pressure Feedback) Squeegee Reference Height (Non Pressure Feedback)
SQUEEGEE MODULE OVERVIEW CHAPTER SQUEEGEE MODULE OVERVIEW Item Description Item Description Squeegee Printhead Mechanism Squeegee Drip Tray Rear Squeegee Stepper Motor Rear Squeegee Front Squeegee Print Carriage Squeegee Drip Tray Mechanism Front Squeegee Stepper Motor Chapter Issue Dec 09 Technical Reference Manual 10.1 SQUEEGEE MODULE OVERVIEW The squeegee mechanism is driven backwards and forwards across the screen by the print carriage The squeegee printhead mechanism incorporates two stepper motors to drive the two squeegees independently down onto the screen when a print stroke is required During the rearward stroke, the front squeegee is in contact with the screen performing a rear print stroke During the forward stroke, the rear squeegee is in contact with the screen performing a forward print stroke The pressure being applied during the print stroke is measured by a strain gauge bridge (located in the spring beam assembly of the squeegee mechanism) and if necessary, a correction to the pressure is made by the software Strain Gauge Bridge (inside spring beam assembly) Spring Beam Assembly (rear plate shown transparent) Rear Squeegee Home Sensor Front Squeegee Home Sensor Rear Squeegee Mount Front Squeegee Mount View on Rear of Squeegee Printhead Mechanism Figure 9-1 Squeegee Sensor Locations 10.2 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE OVERVIEW Squeegee Drip Tray Squeegee Drip Tray Mechanism Squeegee Drip Tray Securing Screw Squeegee Drip Tray Drip Tray Guide Shaft View on Front of Squeegee Drip Tray Drip Tray Pneumatic Actuator Drip Tray Retracted Sensor Speed Control Valves View on Rear of Squeegee Drip Tray Figure 9-2 Squeegee Drip Tray Overview The squeegee drip tray mechanism secures to the underneath of the print carriage The drip tray pneumatic actuator extends the drip tray below the squeegees to prevent print medium from dripping onto the screen during print carriage initialisation or auto screen loading The squeegee drip tray mechanism is also used to accommodate the auto screen loader mechanism, refer to the Adjustable Screen Mount (ASM) or Cast C Chase Module chapters for more information The drip tray retracted sensor is used by software to check that the pneumatic actuator has retracted the drip tray before lowering the squeegees NOTE With the squeegee drip tray and the screen depth adjuster fitted, the ASM must be set to 29 inches and cannot accommodate smaller screen sizes Chapter Issue Dec 09 Technical Reference Manual 10.3 10.4 Technical Reference Manual Step Step Dual Stepper Card X2 NextMove Interface NextMove ES M36PL35 (I/O Node 1) M36PL21 M36PL21 M36PL12 CAN Bus NOTE The breaks in the CAN Bus chain reflect that additional I/O Nodes may be fitted, refer to Machine Control chapter for the complete CAN Bus chain Motherboard PC USB M36 Machine Control N3SK3 N3SK2 Motor BMotor B+ Motor AMotor A+ Motor BMotor B+ Motor AMotor A+ CAN Out CAN In Print Carriage I/O Node Print Carriage N3PL16 9PL17 9PL16 9SK12 9PL08 9SK11 Rear Squeegee Stepper Motor (9M4) Front Squeegee Stepper Motor (9M3) Squeegee Front Home (9SE04) Spring Beam Strain Gauge Bridge (9SE6) Squeegee Rear Home (9SE05) 0V +V -IN +IN SQUEEGEE MODULE ELECTRICAL SCHEMATIC ELECTRICAL SCHEMATIC Chapter Issue Dec 09 SQUEEGEE MODULE REPLACEMENT PROCEDURES REPLACEMENT PROCEDURES ProFlow to Squeegees Instances may occur when the machine is required to print using the squeegee module configuration The following procedure details how to revert the machine from ProFlow use to the squeegee configuration: Removing ProFlow Select Maintenance Select Diagnostics Use Next or Previous to highlight ProFlow Select Select Module Ensure Home ProFlow is highlighted Select Run Diagnost Select Exit Select Exit Select Back 10 Select Open Cover Commands 11 Select Carriage To Front 12 Select Back 13 Select Shut Down and switch the mains isolator to OFF Chapter Issue Dec 09 Technical Reference Manual 10.5 SQUEEGEE MODULE REPLACEMENT PROCEDURES 14 Disconnect both curly air lines from the self-seal pneumatic connectors situated either side of the ProFlow printhead mechanism ProFlow Motor (9SK17) Pneumatic Connectors Home Sensor (9SK08) ProFlow Paste Level Sensor (9PL61) 15 Disconnect the three ProFlow mechanism connectors from the print carriage, left hand side: • ProFlow Motor • Home Sensor • ProFlow Paste Level Sensor (if Time to Go is enabled, an amplifier is connected to 9PL61 and the connection is made to 9PL62 on the amplifier) 16 Manually raise the ProFlow pressure mechanism by pulling the latch on the front of the unit and lifting the mechanism to the fixed raised position 17 Open the locking clip securing the transfer head to the pressure mechanism and carefully slide the transfer head out and away from the pressure mechanism as indicated in the figure below 10.6 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE REPLACEMENT PROCEDURES 18 Release the pressure mechanism from the printhead mechanism by unscrewing the two securing bolts, using a 5mm Allen key 19 Loosen the four captive screws securing the ProFlow printhead mechanism to the print carriage using a 4mm Allen key Carefully remove the mechanism from the print carriage Captive Screw (in positions) Chapter Issue Dec 09 Technical Reference Manual 10.7 SQUEEGEE MODULE REPLACEMENT PROCEDURES Fitting Drip Tray Slide the slot in the drip tray onto the bearing on the drip tray guide shaft Drip Tray Guide Shaft Speed Control Valves Drip Tray Securing Screw Secure the drip tray to the actuator piston using the securing screw Open the speed control valves on the drip tray actuator Fitting Squeegee Carefully position the rear of the printhead mechanism (spring beam assembly) into the print carriage so that both printhead mechanism dowels locate into the print carriage locating holes Secure the unit to the print carriage by means of the four captive screws, ensuring the pneumatic pipe is not trapped Captive Screw (in positions) Spring Beam Assembly Print Carriage Locating Hole (in positions) Locating Dowel (in positions) 10.8 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE REPLACEMENT PROCEDURES Connect the following connectors to the print carriage, left hand side: • Rear Squeegee Motor • Front Squeegee Motor • Home Sensors • Squeegee Pressure Amplifier Rear Squeegee Motor (9SK17) Front Squeegee Motor (9SK16) Squeegee Pressure Amplifier (N3SK16) Home Sensors (9SK08) Fit the required configuration of squeegees to the printhead mechanism squeegee mounts NOTE Squeegee fitting information is detailed in the Replacement Procedures section of this chapter Switch the mains isolator to ON and ensure that the machine recognizes the squeegee module fit by displaying Squeegees Uninitialised during the machine initialisation sequence Drive Belt Replacement Select Open Cover Commands Select Carriage To Front Select Back Select Shut Down Select Continue Switch the mains isolator to OFF Open the front printhead cover Remove squeegees if fitted Remove the drive belt cover plate from the squeegee printhead mechanism Chapter Issue Dec 09 Technical Reference Manual 10.9 SQUEEGEE MODULE REPLACEMENT PROCEDURES and remove the broken drive belt Securing Screws Drive Belt Cover Plate Drive Belts Squeegee Printhead Mechanism Rear Squeegee Drive Belt The rear squeegee drive belt (right hand stepper motor) can be replaced without having to remove the printhead mechanism from the print carriage Slacken off the three screws securing the right hand motor to the motor support plate Drive Belt Motor Securing Screw Position (3 positions) Looped Cable Tie Force Meter Right Stepper Motor Tension in Direction of Drive Belt Orientation Rear Squeegee Motor Tensioning Fit the new belt in position Using a cable tie wrap or similar, provide a loop around the top of the body of the motor enabling the motor to be pulled using a force meter Ensure that the force meter is pulled in the direction which the drive belt is fitted, figure above refers Pull the force meter until a tension of 3-4kgs is monitored on the meter Tighten the three screws whilst the motor is under tension Front Squeegee Drive Belt To replace the front squeegee drive belt (left hand stepper motor), the printhead mechanism must be removed from the print carriage Disconnect the following connectors from the print carriage, left hand side 10.10 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE REPLACEMENT PROCEDURES • Rear Squeegee Motor • Front Squeegee Motor • Home Sensors • Squeegee Pressure Amplifier Remove the printhead mechanism by unscrewing the four screws securing the unit to the print carriage Placing the unit on a secure surface, slacken off the three screws securing the left hand motor to the support plate Fit the new belt in position Using a cable tie wrap or similar, provide a loop around the top of the body of the motor enabling the motor to be pulled using a force meter Ensure that the force meter is pulled in the direction which the drive belt is fitted, Rear Squeegee Motor Tensioning figure example refers Pull the force meter until a tension of 3-4kgs is monitored on the meter Tighten the three screws whilst the motor is under tension On completion re-fit the printhead mechanism to the print carriage refit the drive belt cover plate and re-connect all leads to the print carriage, left hand side Refit the squeegees Chapter Issue Dec 09 Technical Reference Manual 10.11 SQUEEGEE MODULE REPLACEMENT PROCEDURES Fitting the Squeegees It is usual to fit two trailing edge squeegees and use the machine in the Print/ Print mode When fitting a single squeegee (trailing edge or diamond section) to the machine, it must be fitted to the front squeegee mount only The following procedure describes a double trailing edge squeegee configuration fit to the machine printhead mounting assembly Select Product Setup Select Change Squeegees The print carriage is driven to the front position Open the front printhead cover Fit the rear squeegee to the rear squeegee mount tightening the thumbscrews finger tight NOTE The locking thumbscrews on the rear squeegee are positioned wider apart than those fitted to the front squeegee and the keyway slot is positioned on the left hand side of the rear squeegee Fitting Squeegees Item 10.12 Description Item Description Front Squeegee Mount Front Squeegee Rear Squeegee Mount Front Squeegee Key and Keyway Slot Locking Thumbscrew (in positions) Rear Squeegee Key and Keyway Slot Rear Squeegee Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE REPLACEMENT PROCEDURES Fit the front squeegee to the front squeegee mount ensuring the thumbscrews are tightened finger tight NOTE The locking thumbscrews on the front squeegee are positioned closer together than those fitted to the rear squeegee and the keyway slot is positioned on the right hand side of the front squeegee Close the front printhead cover Press the System button Select Continue 10 Select Back 11 Carry out Squeegee Reference Height calibration, Calibrations section of this chapter refers Chapter Issue Dec 09 Technical Reference Manual 10.13 SQUEEGEE MODULE CALIBRATIONS CALIBRATIONS Squeegee Pressure Calibration Squeegee pressure calibration is carried out on machines, fitted with the Pressure Hardware option, after the following circumstances: • The squeegee mechanism is replaced • The strain gauge bridge in the squeegee mechanism is replaced • The rising table sensors have been replaced or adjusted A force meter calibration jig and squeegee pressure plate are required to perform the squeegee pressure calibration 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) Ensure that the Pressure Hardware parameter in Maintenance\Machine Setup\Options is set to FITTED Use the following procedure to calibrate the squeegee pressure: 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 Select Open Cover Commands Select Carriage To Rear Select Unload Screen Open the front printhead cover Remove the screen from the machine Remove the tooling from the manual tooling plate Close the front printhead cover Press the System button 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 calibration rig’ is displayed with the following window: CALIBRATION DATA Gain Factor 10.14 Technical Reference Manual 1.02 Chapter Issue Dec 09 SQUEEGEE MODULE CALIBRATIONS 15 Open the front printhead cover 16 Ensure that the calibration jig is secured to the mounting plate as shown in the following graphic: S Mounting Plate A Mounting Holes A S Calibration Jig Chapter Issue Dec 09 Technical Reference Manual 10.15 SQUEEGEE MODULE CALIBRATIONS 17 Fit the calibration jig to the front squeegee position 00.00 Squeegee Pressure Plate MAX Zero RESET UNITS TXD O OFF I ON Portable Force Gauge (Calibration Jig) Locating Dowel (in positions) View on Front of Rising Table and Squeegee Mechanism 18 Fit the squeegee pressure plate to the rising table ensuring that the locating dowels insert 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 NOTE Achieving exactly 10kg may not be possible as some calibration jigs display down to three decimal places 24 Select Set Calib 25 Select Exit 26 The front squeegee mechanism moves to the home position The message ‘Confirm that the pressure calibration jig has been removed.’ is displayed 10.16 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE CALIBRATIONS 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 28 Carry out the Squeegee Reference Height (Pressure Feedback) calibration Squeegee Squeegee reference height is carried out on machines fitted with the Pressure Reference Height Hardware option after the following circumstances: (Pressure • Squeegee pressure calibration Feedback) • Squeegee change Use the following procedure to set the squeegee reference height: If a Ptest.dat file is not required, go to Step Select Maintenance Select Test Cycles Select Data Logging On Select Back Select Back Select Setup Product Select Squeegees 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 displayed 16 Fit the required squeegees to the front and rear squeegee mounts as detailed in the Replacement Procedures section of this chapter 17 Select Continue 18 The following machine sequence is carried out: a The rails are checked for the presence of a board b The rising table is driven 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 is driven down to dwell height f The front squeegee is driven down by the stepper motor until contact with the board clamp is made g The front squeegee continues to be driven down until a 2kg pressure difference is detected, the motor pauses Chapter Issue Dec 09 Technical Reference Manual 10.17 SQUEEGEE MODULE CALIBRATIONS h The amount of steps (the stepper motor took to get to this position) and the pressure are recorded i The stepper motor drives downwards another 15 steps, this is recorded with the pressure detected This is repeated a further 18 times to achieve a total of 20 results 19 The rear squeegee is calibrated in a similar manner 20 The message ‘Calibrate Squeegee heights complete’ is displayed 21 Select Back 22 Select Back 23 Select Maintenance 24 Select Test Cycles 25 Select Data Logging Off 26 Select Back 27 Select Back 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, 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: From the Windows start menu, select Programs - Accessories - Windows Explorer Under My Computer, locate and open the E:\Log\Ptest.dat file 10.18 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE CALIBRATIONS The figure below gives a representation of the Ptest.dat file Front Squeegee (kg) (steps) 13.778456 4039.000000 4054.000000 NOTE Text shown in italics is not displayed in the Ptest.dat file 14.236444 4069.000000 14.724963 4084.000000 15.121886 4099.000000 15.579873 4114.000000 16.007328 4129.000000 16.465315 4144.000000 16.892770 4159.000000 17.350757 4174.000000 17.839277 4189.000000 18.266732 4204.000000 18.694187 4219.000000 19.213239 4234.000000 19.640694 4249.000000 20.129213 4264.000000 20.587201 4279.000000 21.045188 4294.000000 21.472643 4309.000000 21.930630 4324.000000 22.388617 Rear Squeegee (steps) 4016.000000 (kg) 13.564729 4031.000000 13.992184 4046.000000 14.480703 4061.000000 14.908158 4076.000000 15.396678 4091.000000 15.885198 4106.000000 16.343185 4121.000000 17.801172 4136.000000 17.289692 4151.000000 17.747680 4166.000000 18.266732 4181.000000 18.724719 4196.000000 19.182706 4211.000000 19.640694 4226.000000 20.068149 4241.000000 20.587201 4256.000000 21.045188 4271.000000 21.503175 4286.000000 21.961163 4301.000000 (Fwd Press Flood) 33.1004 Squeegee Reference Height (Non Pressure Feedback) 22.480215 (Rear Press Flood) (Flood Ref Height) 31.9668 3951.6971 (Front Ref Height) 3947.7037 (Rear Ref Height) 3935.1178 The squeegee reference height is carried out after a squeegee change on machines without the Pressure Hardware option This procedure must be used if Pressure Hardware is disabled Use the following procedure to set the squeegee reference height: Select Open Cover Commands Select Carriage To Front Select Unload Screen Open the front printhead cover Remove the screen from the machine Fit the required squeegees to the front and rear squeegee mounts as detailed in the Replacement Procedures section of this chapter Close the front printhead cover Press the System button Select Back Chapter Issue Dec 09 Technical Reference Manual 10.19 SQUEEGEE MODULE CALIBRATIONS 10 Select Setup Product 11 Select Squeegees 12 Select Calibrate Heights 13 The following machine sequence is carried out: a The rails are checked for the presence of a board b The rising table is driven to print height c The board clamps are closed d The print carriage drives the front squeegee over the front rail e The front and rear squeegees are driven down by the stepper motor to dwell height 14 Select Calibrate Front Squeegee 15 The front squeegee is driven down to the current reference height position 16 Select Jog 17 Open the front printhead cover 18 Using a 0.1mm shim placed between the front rail and the front squeegee, check that the shim moves with a small amount of friction 19 If the gap is correct, go to Step 29 20 For adjustment, select the appropriate Jog Up/Jog Down button on the monitor 10.20 Technical Reference Manual Chapter Issue Dec 09 SQUEEGEE MODULE CALIBRATIONS 21 Using the two button controls simultaneously, jog the squeegee in the chosen direction 22 Recheck the gap 23 Repeat Steps 20 to 22 until the correct gap is achieved 24 Close the front printhead cover 25 Press the System button 26 Select Back 27 Select Save 28 Go to Step 31 29 Close the front printhead cover 30 Press the System button 31 Select Back 32 Select Calibrate Rear Squeegee 33 The rear squeegee is driven down to the current reference height position 34 Repeat Steps 16 to 31 for the rear squeegee 35 Select Back 36 Select Back 37 Select Back Chapter Issue Dec 09 Technical Reference Manual 10.21 SQUEEGEE MODULE CALIBRATIONS 10.22 Technical Reference Manual Chapter Issue Dec 09 ... Issue Dec 09 SQUEEGEE MODULE OVERVIEW Squeegee Drip Tray Squeegee Drip Tray Mechanism Squeegee Drip Tray Securing Screw Squeegee Drip Tray Drip Tray Guide Shaft View on Front of Squeegee Drip... shown transparent) Rear Squeegee Home Sensor Front Squeegee Home Sensor Rear Squeegee Mount Front Squeegee Mount View on Rear of Squeegee Printhead Mechanism Figure 9-1 Squeegee Sensor Locations... Rear Squeegee Stepper Motor (9M4) Front Squeegee Stepper Motor (9M3) Squeegee Front Home (9SE04) Spring Beam Strain Gauge Bridge (9SE6) Squeegee Rear Home (9SE05) 0V +V -IN +IN SQUEEGEE MODULE