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Avantra 36/44 Service Manual
5-2
Alignment
5.2
Beginning of Line (BOL) Alignment
Procedure
Use the BOL Alignment Procedure to set the correct starting position of the laser
beam on the drum surface in the fast scan direction. Position the beam by
entering an encoder offset value in the AVDIAG Program. This value determines
the distance between the encoder's zero reference signal and the actual start of
the BOL. The value is stored in EEPROM on the DEC.
Tools Required: 18" Scale, eye loupe
Coarse Alignment:
1.
Open the upper and lower right side doors.
2.
Remove the drum light shield.
3.
Remove the left carrier shroud to expose the laser beam on the drum sur-
face.
4.
Pull out the door interlock switches to allow the spin motor to turn on with
the drum light shields removed.
5.
Turn the system on and allow the boot cycle to complete.
6.
With the PC connected to the diagnostic serial port of the system, launch
the AVDIAG program.
7.
Enter the Align menu and select SGM-A/B Mod Align. Enter the following
parameter values each followed by Beam ON:
Resolution: 3600
Gate Start:
0
Gate Length:
44.5
BOL Position:
Enter an initial value (about 32000)
NOTE: All the above values must be entered even if they are
already selected when you entered SGM-A/B Mod Align. If
not, the system can not calculate where the correct BOL
should begin.
NOTE: If the beam is not visible, either the intensity is too low or
the beam is 180˚ out of position. First, try entering a large
BOL position value change (i.e., 10000). At least a partial
scan line should appear at this point. If the beam is still not
visible, try entering a polarizer value. The polarizer value
entered should be close to the coarse density value for the
particular resolution currently set.
Summary of Contents for Avantra 36/44
Page 1: ...The Avantra 36 44 Service Manual Part Number 580078 0002 ...
Page 24: ...Section I Imagesetter ...
Page 282: ...Section II Bridge ...
Page 327: ...Section III Buffer ...
Page 359: ...Section IV On line Processor ...
Page 462: ...Avantra 36 44 Service Manual B 2 Spare Parts Avantra 36 44 OLP Parts ...
Page 464: ...Avantra 36 44 Service Manual B 4 Spare Parts Avantra 36 44 OLP Parts ...
Page 466: ...Avantra 36 44 Service Manual B 6 Spare Parts Avantra 36 44 OLP Cassette Parts ...
Page 468: ...Avantra 36 44 Service Manual B 8 Spare Parts Avantra 36 44 OLP Feed Rack Parts ...
Page 470: ...Avantra 36 44 Service Manual B 10 Spare Parts Avantra 36 44 OLP Tank Parts ...
Page 472: ...Avantra 36 44 Service Manual B 12 Spare Parts Avantra 36 44 OLP Right Side View Parts ...
Page 474: ...Avantra 36 44 Service Manual B 14 Spare Parts Avantra 36 44 OLP Control Panel Parts ...
Page 476: ...Avantra 36 44 Service Manual B 16 Spare Parts Avantra 36 44 OLP Rack Spare Parts ...
Page 478: ...Avantra 36 44 Service Manual B 18 Spare Parts Avantra 36 44 OLP Dryer Spare Parts 18 ...
Page 480: ...Avantra 36 44 Service Manual B 20 Spare Parts Electronics upper Spare Parts ...
Page 482: ...Avantra 36 44 Service Manual B 22 Spare Parts Electronics lower Spare Parts ...
Page 484: ...C 1 Appendix C Wiring Diagrams ...
Page 491: ...Section V Crane ...