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Durst Rho 312R Service Manual

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Rho 312R / Rho 512R
Service Manual – Print head 12M 2C S
(for print head version with 400 dpi part nr. LJ3022400)
Edition 15.12.2014

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Summary of Contents for Durst Rho 312R

  • Page 1 Rho 312R / Rho 512R Service Manual – Print head 12M 2C S (for print head version with 400 dpi part nr. LJ3022400) Edition 15.12.2014...
  • Page 2 Rho 312 / 512R / Rho 312R 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 3: Table Of Contents

    Aligning the Y distance between the YM print head modules ........26 Aligning MY to YM print head modules ................28 Aligning mc/cm to CK print head modules ..............29 5.10 Fixing the print head modules in place ................30 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 4 Rho 312 / 512R / Rho 312R Software adjustment ..................31 Head voltage adjustment ....................31 Slot offset adjustment ..................... 33 Drop fly time adjustment ....................37 Encoder calibration ......................38 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 5: About This Document

    This document is part of the service documentation and contains information about how to replace the print head modules. This information applies to printers of the Rho 512R / Rho 312R range of Durst Phototechnik AG and should be referred to by the following personnel: ...

  • Page 6: Structure Of Warnings

    Warnings are structured as follows (shown here as an example: the warning level “WARNING”): WARNING! Type and source of the hazard Consequences of the hazard.  Measures for avoiding the hazard.  Read the warning and comply with it. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 7: Materials And Tools Required

    Head locking wrench for print head Hexagon nut driver, 4.0 mm ZW27136 module Head adjustment wrench for print Hexagon nut driver, 3.0 mm ZW27135 head module Tab. 3: Materials and tools required 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 8: Description Of The Print Head Module

    Description of the print head module 3.1 Position of the fixing and adjustment screws Fig. 1: Position of the adjustment and fixing screws Adjustment screws (X rotation) Adjustment screw (Y direction) Fixing screws 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 9: Slot Arrangement

    Depending on the exact configuration of the printer, the arrangement of the print heads can be seen on the circuit diagram ( circuit diagram). Fig. 4: Arrangement of the print heads for CMYKcm + white (example) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 10: Replacing The Print Head Module

    4.1 Before replacing a print head module Before replacing a print head module, print a test pattern. This provides documentation of the condition of the nozzles.  Printing a density compensation test 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 11: Disassembling The Old Print Head Module

    5. Fit plugs or caps to seal off the ink tubes at the print head end and printer end. When pulling off the meniscus tube, make sure that the vacuum is maintained until the seal has been made, for instance by pressing the meniscus tube. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 12: Preparing The Old Print Head For The Dispatch

    4. Fill in the Print Head Change Form. 5. Send the old print head to Durst Service, enclosing the following data in a package protected against ink: – Test pattern printed using the old print head module –...

  • Page 13: Fitting The New Print Head

    Except where print head modules are to be drained, all meniscus tubes suspended from the same meniscus valve must be sealed or clamped. 9. Select the Pumps / Valves tab. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 14: Calculating The Lois Offset (Low On Ink Sensor)

    LOIS offset = LOIS voltage x 100 + 20 – ITV (ink temperature value) ITV (ink temperature values): 51°C  ITV = 314  standard setting for Rho 512R and Rho 312R 50°C  ITV = 320 47°C  ITV = 338 42°C ...

  • Page 15: Close The Print Head Module Commissioning

    2. Perform 2 long purges with the exchanged print head module (without cleaning the nozzle plate). 3. Perform a long purge with all colors (with cleaning the nozzle plate). 4. Print a few images to check that all the nozzles are operational. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 16: Mechanically Aligning The Print Heads

    •Adjusted heads: YM 1-4 •Adjusted heads: YM 2-4 •Adjusted heads: MY 1-4 Alignment of mc and cm to CK print head modules •Reference: CK •Adjusted heads: mc 1-4, cm 1-4 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 17: Adjusting The Rotation Of The Print Head Modules

    Media Advance in Pixels Number of repeats Patternmask 0xAA Tab. 4: X rotation test pattern settings Fig. 5: X Rotation test pattern settings 3. Press the Print Buffer button. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 18 1. Align the print head module with the adjustment screws for X rotation (do steps of ¼ to ½ of a turn). 2. Print the test pattern and evaluate it. 3. Repeat the procedure if necessary until the print head module is correctly aligned. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 19: Aligning The Y Distance Between The Ck Print Head Modules

    Return in park position Encoder compensation Binary Mode (800dpi) Media Advance in Pixels Number of repeats Patternmask 0xAA Tab. 5: Y Distance test pattern settings Fig. 8: Y Distance test pattern settings 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 20 The cyan pattern is printed with slot 1 of the specific print head. The black pattern is printed with slot 4. Optimum setting The density in all fields is uniform throughout. The cyan pattern and the black pattern give the same result. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 21 In area B CK2 is printing on CK1. Area B must look equal as area A. In the example above the Y position of print head CK2 is too high. The print head must be moved down. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 22: Aligning Kc To Ck Print Head Modules

    Options High Resolution Unidirectional Return in park position Encoder compensation Binary Mode (800dpi) Media Advance in Pixels Number of repeats Patternmask 0xAA Tab. 6: Y Align test pattern settings 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 23 In the left pattern slot 1 of CK and slot 1 of KC are printing on top of each other. In the right pattern slot 4 of CK and slot 4 of KC are printing on top of each other. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 24 The first line of CK and KC are at the same height. The lines of CK and KC are overlapping Aligning the print head module ( Chapter 5.4, p. 22) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 25: Aligning Ym To Ck Print Head Modules

    The first line of CK and YM are at the same height. The lines of CK and YM are overlapping Aligning the print head module ( Chapter 5.4, p. 22) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 26: Aligning The Y Distance Between The Ym Print Head Modules

    The yellow pattern is printed with slot 1 of the specific print head. The magenta pattern is printed with slot 4. Optimum setting The density in all fields is uniform throughout. The yellow pattern and the magenta pattern give the same result. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 27 In the example above the Y position of print head YM3 is too low. The print head must be moved up. Aligning the print head module ( Chapter 5.4, p. 22) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 28: Aligning My To Ym Print Head Modules

    The first line of YM and MY are at the same height. The lines of YM and MY are overlapping Aligning the print head module ( Chapter 5.4, p. 22) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 29: Aligning Mc/Cm To Ck Print Head Modules

    2. Check and if necessary adjust the setting for the Y Align Spot test pattern, (Tab. 6, p. 22) 3. Press the Expose button. Example mc Fig. 15: Evaluating the Y Align test pattern in detail (mc) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 30: Fixing The Print Head Modules In Place

    Check the Y Distance and the Y Align test pattern again to make sure that the print head modules did not get out of place. b) Readjust a print head module if necessary. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 31: Software Adjustment

    TestPatternXResolutin: 500 Media Advance in Pixels Number of repeats Tab. 7: Head Voltage test pattern settings Fig.17: Head Voltage test pattern settings 3. Press the Print More Passes button 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 32 1. Select the Service tab  Print Head Setup 2. Open the settings for the head which needs to be adjusted and enter the value into the corresponding window. 3. Press the OK button. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 33: Slot Offset Adjustment

    TestPatternXResolutin: 500 Greyscale Mode TestPatternXResolutin: 600 Media Advance in Pixels Number of repeats Patternmask 0xAA Tab. 8: Head Voltage test pattern settings 3. Press the Print More Passes button 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 34 Rho 312 / 512 Fig. 18: Slot Offset test pattern settings for 800dpi Fig. 19: Slot Offset pattern settings for 500dpi Fig. 20: Slot Offset test pattern settings for 600dpi 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 35 Rho 312 / 512 Software adjustment Fig. 21: Evaluating the test pattern Offset_800, Offset_600 and Offset_500 (example) 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 36 In test chart one CK4_S3 shows a deviation of -6 and CK4_S4 a deviation of -17. In test chart two CK4_S2 shows a deviation of +11 and CK4-S3 a deviation of +23. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 37: Drop Fly Time Adjustment

    The vertical lines generate a single line. The text is sharp. Depending on resolution and head media distance the text and the vertical lines will not always show the same result!  Use the text for fine tuning. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

  • Page 38: Encoder Calibration

    Double lines in horizontal direction, dark overlaps in the color field. The Encoder Offset value needs to be increased. Optimum setting No white gaps or dark overlaps are visible and the horizontal lines generate a single line. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...
  • Page 39 2. Change the Encoder offset values by using the buttons on the right bottom side of the software. The Encoder offset values are getting automatically saved to the currently used media channel. 2014 © Durst Phototechnik AG, Print head 12M 2C, Edition 15.12.2014...

This manual is also suitable for:

Rho 512r

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