HP Indigo WS6000 Blanket Creep Diagnosis and Correction

HP Indigo WS6000 Manual

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  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 1
    Purpose To diagnose and correct blanket creep phenomenon. Service instruction details Item Scope Document Number Date Security level Details HP Indigo WS6000 Digital Press, HP Indigo WS6600 Digital Press, HP Indigo WS6800 Digital Press HP Indigo W7200 Digital Press CA393-02170 17-July-14
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 2
    transfer (T2) and top dead point (TDP) calibration...2 For yaw calibration...3 3 Procedure...4 Overview ...4 Perform Press Leveling Measurements...6 Diagnosing Cold Start Condition ...6 Cooling the press...7 Verify first transfer position...11 Repeat Cold Start test ...12 ITM to Impression drum (T2
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 3
    1 Overview Blanket creep results from axial misalignment between two or more drums (PIP/ITM drums and/or ITM/ impression drums), and excessive pressure during a cold start. Diagnosis of the causes of this issue requires identification of the drum pair that is responsible for the creep. The cold
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 4
    level - accurate to 0.1 mm Flashlight Small telescopic mirror Tie-wraps (300 mm or longer) (x5) Web Handling System (WHS) in the Printing Engine Service Document (CA393-00590) For second transfer (T2) and top dead point (TDP) calibration Follow these steps for the second transfer and top dead point
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 5
    For yaw calibration Follow these steps for yaw calibration. 1. Cut blanket - cut 150mm blanket Figure 2-4 Figure Cut blanket 2. 4 X 90 micron condat papers (360 micron thermal expansion compensation). 3. Yaw jig - CA045-16791 Figure 2-5 Figure Yaw jig For yaw calibration 3
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 6
    a copy to HP Indigo. Corrective actions consist of: 1. Cold start correction (install I-Fix). 2. T1 correction by aligning ITM bearings. 3. IMP to ITM YAW calibration. 4. Top Dead Point Offset calibration - T2 (2nd transfer) gap balance and calibration according to the instructions in Web Handling
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 7
    Figure 3-1 Diagnosis and Calibration Decision Flowchart Overview 5
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 8
    Leveling Measurements Follow these steps to perform press leveling measurements. 1. Remove the BCS unit if it existsKeep it out until the end of ITM drum - use mirror to read measurement Diagnosing Cold Start Condition If the press is hot, perform the cooling procedure below. 6 Chapter 3 Procedure
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 9
    Prior to starting the diagnostic procedure, cool the press as follows: 1. In press Standby mode, cool the ink. a. In the press software, go the Main Menu, Problem Handling, HP Indigo Print Care. b. Check Service Level. The Service Level panel opens. c. Select Customer Engineer. In the entry window
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 10
    BID status. b. Verify that the ink temperature is 20º C or less. Figure 3-6 Checking temperature in the Ink and BID panel c. In the Main Menu, select Press Status, then System Status. The System Status panel opens. 8 Chapter 3 Procedure
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 11
    following line to the end of the file: enableBlanketAntiCreep=0 e. Save the file. f. Restart the press software. 7. In the press software, make sure that there is no bypass on the Cold Start button. In the Service Panel, select Bypass, then Cold Start, and remove the check mark from Automatic Cold
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 12
    10. Run cold start sequence until the press is in Ready state. 11. Put the press in Standby. 12. Measure the blanket position. a. Go the System . Open the Systab Editor. From the Main Menu, select Problem Handling, CE Wizard, then choose Systab Editor and click Run Process. 10 Chapter 3 Procedure
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 13
    )> Steps To Move in Step 3 of the Diagnostic form, box 11. Verify first transfer position Follow these steps to verify first transfer position. 1. In the press software, go the Main Menu, Blanket and PIP Panel, and click First Transfer. Verify first transfer position 11
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 14
    note the values in the Diagnostic form boxes 15 and 16. Repeat Cold Start test Follow these steps to repeat cold start test. 1. Cool the press again. 2. Repeat the cold start test as described above (see page 7). 3. Write the new values in the Diagnostic form boxes 17, 18, 19, and 20
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 15
    engine c. Using notepad, edit boot_mcn.cmd d. Delete the following line from the end of the file: enableBlanketAntiCreep=0 e. Save the file. f. Restart the press software. ITM to Impression drum (T2) test Follow these steps for ITM to impression drum test. 1. Install a new blanket. ITM to Impression
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 16
    2. Bypass the Cold Start and LasersIn the Bypasses panel. Cold Start tab (Service, CE Mode, Bypass), check Automatic Cold Start. 3. Use the MMI_Stepper to set T1 engage parameters to 980: a. Browse to C:\Unicorn\release\mmi_stepper.exe. Double-click
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 17
    e. In the Select a Segment Index field, select 0 (zero) Figure 3-12 Dialog window 4. Click OKThe mmi_Stepper window opens. 5. On the left side of the mmi_Stepper window select PIP_ENGAGE_FRONT... 6. On the right side of the window: a. Change current half steps value to 980 b. Click on File, Generate
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 18
    b. Click on File, Generate Profile, then Save SysTab. Figure 3-13 mmi_Stepper window 9. Print 10,000 impressions with Motion profile 2 job starting with a hot ITM drum (105 ºC). 10. At 5000 impressions, Measure the blanket position as shown in Figure 3-8 Measuring the distance between the edge of
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 19
    assembly, the IR sensors bracket, and cut off the substrateTake off the blanket and close the external heater interlockConnect the IRS thermal sensor to the press. 2. ITM yaw measurement. - Assemble ITM Yaw jig on the feed roller as show below: Figure 4-1 Calibration rail Corrective Actions 17
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 20
    a. Place the calibration rail on the feed roller. Figure 4-2 Calibration rail on feed cylinder b. Using 2 tie-wraps on each side, secure the rail to the roller. Figure 4-3 Tie-wraps secure rail to feed roller 18 Chapter 4 Corrective Actions
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 21
    jig into position (Figure 24). Figure 4-5 Installing the calibration Jig 1 Small pin in the IMP drum gear 2 Large pin in rear IMP arm 5. Put the press into Standby. IMP to ITM YAW calibration 19
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 22
    6. Insert the short cut blanket between the ITM and the impression drum along with four sheets of condat 90 paper to simulate printing pressure. Figure 4-6 Cut blanket assembly 7. Perform pneumatic engage from the unwinder touchscreen panel. 8. Install the indicator gauge on the magnetic arm. 9.
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 23
    12. Position the indicator near the rear wall, with the gauge pointing at zeroThe small pointer should be on 5. 13. Move the magnetic arm toward the front wall pushing the magnetic cubeNotice the direction of the needle movement on the gauge - clockwise (+), or counterclockwise (-). Figure 4-9 Yaw
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 24
    5. Figure 4-11 Measuring the impression drum misalignment- zero point 2. Holding the magnet, slide the rail block to the rear side of the press; adjust the arm to obtain a measurement range between 10mm of the impression drum edges. Figure 4-12 Measuring the impression drum misalignment 22 Chapter
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 25
    the indicator clock to zero. Figure 4-13 Sliding the rail block 4. Holding the magnet, gently slide the rail block to the front side of the press, and read the indicator result, pay attention to the direction of the indicator knob. 5. Write down the results in the Diagnostic form, box 22. Adjusting
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 26
    gently slide the rail block to the front side of the press, and read the indicator result. Rotate the adjusting screw until page 23). 4. Holding the magnet, slide the rail block to the rear side of the press, and zero the indicator. 5. Holding the magnet, gently slide the rail block and read the indicator
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 27
    and calibration If strain gauges are installed on the press, run the Second Transfer Strain Gauge Wizard from Print Care. If strain gauges are not installed on the press, follow the instructions in Web Handling System (WHS) in the Printing Engine Service Document (CA393-00590). T2 (2nd transfer) gap
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 28
    5 Diagnostic Report 26 Chapter 5 Diagnostic Report
  • HP Indigo WS6000 | Blanket Creep Diagnosis and Correction - Page 29
    printing instructions, and a notice of document confidentiality. Revision history Below is the history of the document revisions and a list of authors. Revision 00 01 02 03 Description Initial document Procedures updated Procedures updated Added to scope: HP Indigo WS6600 Digital Press, HP Indigo
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Blanket Creep Diagnosis and Correction
Purpose
To diagnose and correct blanket creep phenomenon.
Service instruction details
Item
Details
Scope
HP Indigo WS6000 Digital Press, HP Indigo WS6600 Digital Press, HP Indigo WS6800
Digital Press
HP Indigo W7200 Digital Press
Document Number
CA393-02170
Date
17-July-14
Security level
HP confidential
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