CAST C CHASE MODULE OVERVIEW CHAPTER 16 CAST C CHASE MODULE OVERVIEW Item Description Item Description 1 C Chase Casting 5 Screen Support Plate (2 positions) 2 Roller Counter Plate (4 positio..............
CAST C CHASE MODULE OVERVIEW CHAPTER 16 CAST C CHASE MODULE OVERVIEW Item Description Item Description C Chase Casting Screen Support Plate (2 positions) Roller Counter Plate (4 positions) Screen Location Skis (4 positions) Screen Depth Adjuster Screen at Centre Opto Transmitter (receiver located in the left hand side C Chase Casting) Pneumatic Screen Clamps (8 positions) Screen Adaptor Securing Point (2 positions) Chapter Issue Nov 11 Technical Reference Manual 16.1 CAST C CHASE MODULE OVERVIEW The cast C chase module is a fixed width system, providing a receptacle for 29 inch square screens The screen is loaded from the front of the machine and slid into the machine along the screen support plates The spring loaded right hand screen location skis aligns the screen with the fixed left hand screen guide strip The screen is clamped in the chase using pneumatic cylinders that clamp the screen to the screen support plates The chase is a floating assembly mounted on a bearing set The chase is positioned to align the screen to the correct printing position During printing, the chase is pneumatically clamped to the left and right printhead assemblies to maintain the aligned position, Screen Alignment Module chapter refers A screen at centre sensor is used to detect the presence of a screen in the chase Screen Loading There is one of three methods used for achieving correct position of the screen within the chase: • Screen Depth Adjuster • Auto Screen Loader • Semi-Auto Screen Loader NOTE Only one of the above items would be fitted to the machine at any one time Auto Screen Loader and Semi-Auto Screen Loader options are not available across the complete range of machines Screen Depth Adjuster Locking Adjustment Knob Measurement Guide TO CE NT RE End Stop RE AR OF ST FR EN ON CIL T JU OF ST IFIE I M D AG IM AG E E 65 SIZ E 20 ” 65 26 ” 24 60 24 ” ” 55 22 ” 50 20 ” 45 18 ” 40 16 ” 35 14 ” 30 12 ” 25 10 ” 20 8” Left Hand View on Screen Depth Adjuster 15 6” The screen depth adjuster is set by the operator prior to loading the screen The screen is loaded manually into the chase until it reaches the stop at the end of the screen depth adjuster NOTE For further information on setting the screen depth adjuster, refer to Screen Depth Adjuster in the Adjustments and Settings section of this chapter 16.2 Technical Reference Manual Chapter Issue Nov 11 CAST C CHASE MODULE OVERVIEW Auto and Semi-Auto Screen Loader NOTE Squeegee drip tray removed for clarity View on Rear Underside of Screen Loader Mechanism Item Description Item Description Screen Loader Mechanism Squeegee Drip Tray Actuator Squeegee Drip Tray Drip Tray Retracted Sensor Screen Stop Screen Loader Actuator Screen Loader Actuator Retracted Sensor Screen Loader Actuator Extended Sensor Screen Position Sensor (Auto Screen Loader only) Chapter Issue Nov 11 Technical Reference Manual 16.3 CAST C CHASE MODULE OVERVIEW Both auto and semi-auto use the same mechanism, but have different loading procedures due to software control; the screen loader mechanism is secured beneath the print carriage, therefore the drive is provided by the print carriage drive system The screen loader accurately positions the screen in the chase The mechanism may also incorporate an optional squeegee drip tray NOTE If semi-auto screen loader is installed on the machine, the screen position sensor is not fitted to the screen loader mechanism For auto screen loading, the screen is manually loaded and the front printhead cover is closed When Load Screen is selected on the MMI, the screen loader is driven forward to locate the rear edge of the screen Once located, the screen loader is driven further forward allowing the screen stop to clear the inner face of the rear frame of the screen The screen stop is extended and the print carriage drive is reversed pulling the screen to the rear of the chase The screen stop is retracted and the screen change mechanism is driven rearwards allowing the screen stop to clear the outer face of rear frame of the screen The screen stop is extended and the print carriage is driven forwards, pushing the screen to the correct position The screen stop is retracted and the screen is clamped in position For semi-auto screen loading, Load Screen is selected on the MMI, the screen loader is driven to the correct load position and the screen stop is extended The operator opens the printhead cover and loads the screen into the machine until it abuts the screen stop This is the correct position for the screen The printhead cover is closed, the operator is requested to confirm the screen is located correctly The screen stop is retracted The screen is clamped in position 16.4 Technical Reference Manual Chapter Issue Nov 11 Chapter Issue Nov 11 Technical Reference Manual USB NextMove ES (I/O Node 1) M36PL35 CAN Bus CAN_H CAN_L CAN GND M36 Machine Control Enclosure 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 N3SK3 N3SK2 N2SK2 N2SK3 0V DIG OUT CAN Out CAN In DIG OUT DIG OUT DIG IN DIG IN DIG IN DIG IN Print Carriage I/O Node Print Carriage CAN In CAN Out N3PL8 N3PL8 N3PL9 N3PL7 N3PL7 N3PL5 15 N2PL4 N2PL10 DIG IN 3 Main Machine I/O Node 13PL01 +12V Signal 0V - 16SK07 + 13SK19 +12V Mode 0V 13PL18 +12V Sig 0V Screen Clamps 16SOL07 Screen at Centre Through Beam Opto 13SE07 Screen Stop Actuator 9SOL29 Drip Tray Actuator 9SOL28 Drip Tray Actuator Retracted 13SE14 Screen Stop Actuator Extended 13SE12 Screen Stop Actuator Retracted 13SE13 Screen Position 13SE11 (Auto Screen Load Only) Tx Rx CAST C CHASE MODULE ELECTRICAL SCHEMATIC ELECTRICAL SCHEMATIC 16.5 CAST C CHASE MODULE ADJUSTMENTS AND SETTINGS ADJUSTMENTS AND SETTINGS Screen Position Sensor Position a screen in the machine so the rear screen frame is beneath the screen position sensor + - Adjuster Test LED Screen Frame Screen Position Sensor Using a potentiometer trimming tool adjust the sensor sensitivity anticlockwise until the sensor test LED extinguishes Turn the sensor sensitivity clockwise until the sensor test LED illuminates Turn the sensor sensitivity clockwise a further half turn Move the rear screen frame backwards and forwards under the sensor to ensure that the test LED is only activated by the screen frame Test LED Off + Test LED On - + - Test LED Off + - Screen Frame Screen Sensor Behind Screen 16.6 Sensor Over Screen Frame Technical Reference Manual Sensor Over Screen Chapter Issue Nov 11 CAST C CHASE MODULE ADJUSTMENTS AND SETTINGS Screen Depth Adjuster The screen depth adjuster has two image scales as follows: • Rear of Stencil to Front of Image - to 26 inches (150 to 650mm) • Centre Justified Image Size - to 20 inches (0 to 508mm) Rear of Stencil to Front of Image Scale 650 REAR OF STENCIL TO FRONT OF IMAGE 26 622 508 CENTRE JUSTIFIED IMAGE SIZE 500 20 600 24 550 400 16 22 500 300 12 20 450 200 18 400 100 16 350 14 300 12 250 10 200 150 Centre Justified Image Size Scale The rear of stencil to front of image scale is located on the top of the screen depth adjuster The centre justified Image size scale is located on the side of the screen depth adjuster The figure below shows the measurement for both centre and front justified stencils, when the stencil is 29 inches square Board Width Centre Justified Rear of Stencil to Front of Image Front Justified NOTE Rear of stencil to front of image is measured from the rear face of the screen frame to the front edge of the image Chapter Issue Nov 11 Technical Reference Manual 16.7 CAST C CHASE MODULE ADJUSTMENTS AND SETTINGS The centre justified image scale, marked on the side of the screen depth adjuster, can only be used for screens that are 29 inches by 29 inches with a centre justified image For other screen sizes with a centre justified image, the Rear of Stencil to Front of Image scale must be used When using the centre justified image scale, the screen depth adjuster is set to the board width value The scale has both imperial and metric units as follows: • Metric - 0mm to 508mm • Imperial - inches to 20 inches To set the screen depth adjuster, use the following procedure: Release the locking adjustment knob by turning it anti-clockwise Locking Adjustment Knob Measurement Guide TO CE NT RE End Stop RE AR OF ST FR EN ON CIL T JU OF ST IFIE IM D AG IM AG E E 65 SIZ E 20 ” 65 26 ” 24 60 24 ” ” 55 22 ” 50 20 ” 45 18 ” 40 16 ” 35 14 ” 30 12 ” 25 10 ” 20 8” Left Hand View on Screen Depth Adjuster 15 6” Set the measurement guide to either: a The rear of stencil to front of image value, on the top scale, for either centre or front justified stencils or b The board width value, on the centre justified image size scale, for centre justified, 29 inch by 29 inch stencils only Turn the locking adjustment knob clockwise to secure the measurement guide 16.8 Technical Reference Manual Chapter Issue Nov 11 CAST C CHASE MODULE CALIBRATIONS CALIBRATIONS Chase to Table Level NOTE This procedure requires the use of a DEK Test Plate, DEK part number 113693 If a DEK Test Plate is required, contact DEK Customer Support before commencing The chase to table level is checked by measuring down to points on the rising table surface from the DEK Test Plate which simulates a screen fitted in the chase A datum reading is taken from the centre hole E, the range of readings must not exceed 0.15mm of the datum Chase Casting Depth Micrometer Test Plate Rising Table View on Front of Machine Figure 16-1 Chase to Table Level Setting B A A .mm B .mm C .mm E D .mm C D E .mm Figure 16-2 Test Plate Recordings Chapter Issue Nov 11 Technical Reference Manual 16.9 CAST C CHASE MODULE CALIBRATIONS Chase to Table Level Adjustment If adjustment is required, the bearing roller at the appropriate corner may be adjusted to obtain the correct depth range NOTE Be careful that this does not result in one corner of the chase ‘floating’, ie load not being spread evenly over the four support rollers Using an appropriate sized C spanner, slacken the locking nut Roller Counter Plate View on Front Left or Rear Right Printhead Roller Bearing Assembly Chase Clamp Locking Nut View on Roller Bearing Assembly (counter plate removed for clarity) Using a slim 24mm spanner, raise or lower the roller bearing assembly within the printhead assembly to achieve the required chase to table level setting Tighten the locking nut Recheck the chase to table level setting 16.10 Technical Reference Manual Chapter Issue Nov 11 CAST C CHASE MODULE CALIBRATIONS On the left hand printhead, ensure a 0.25mm shim/feeler gauge fits between the roller counter plate and the chase clamp Chase Clamp Securing Screws Roller Counter Plate View on Front Left or Rear Right Printhead If adjustment is necessary, slacken the two securing screws and adjust the height of the chase clamp to achieve the dimension in Step Tighten the two securing screws Repeat Steps - for the chase clamp on the right hand printhead Associated Calibrations and Adjustments The settings shown below should be checked following adjustments to the chase to table level • Chase Clamp Regulator Setting (Pneumatic Module) • Vision Height (Camera System Module) • Vision System Calibration (Camera System Module): Stage - Calibrate Vision Stage - Calibrate Offset Chapter Issue Nov 11 Technical Reference Manual 16.11 CAST C CHASE MODULE CALIBRATIONS 16.12 Technical Reference Manual Chapter Issue Nov 11 ... achieve the required chase to table level setting Tighten the locking nut Recheck the chase to table level setting 16.10 Technical Reference Manual Chapter Issue Nov 11 CAST C CHASE MODULE CALIBRATIONS... Tray Actuator Retracted 13SE14 Screen Stop Actuator Extended 13SE12 Screen Stop Actuator Retracted 13SE13 Screen Position 13SE11 (Auto Screen Load Only) Tx Rx CAST C CHASE MODULE ELECTRICAL SCHEMATIC.. .CAST C CHASE MODULE OVERVIEW The cast C chase module is a fixed width system, providing a receptacle for 29 inch square screens The screen is loaded from the front of the machine and