Dolev 800 Calibration with the Brisque

O. Belkind
August 27, 1996

0. Overview
1. Exposable Area Calibration
2. Punch Calibration

0. Overview

• After a few misunderstandings regarding the calibration of the Dolev 800, and the usage of the plotter with the Brisque, this document will try to clarify the major difficulties.
• When using both the PS2 and the Brisque with the plotter, calibration of the plotter should be done with the Brisque. Calibration should be good for both hosts.

Note:
Before beginning the calibration only default values should be entered in the different fields.

This document will describe three general procedures of calibration.

1. Exposable Area Calibration
2. Punch Calibration
3. Align to punch in the Brisque vs. the PS2

1. Exposable Area Calibration

Create a full format synthetic file (812 mm H by 1117 mm W) with the "CreateFile" application.
Important parameters:

Max film feed (default 1180 mm). [NVM screen, Cri, Factory tables, Plotter Description]

Plotter Setting [NVM screen, Cri, Service Tables, Plotter Setting]

        Offsets

        Home Margins                                                      End Margins

1. The Feeder value is calibrated by loading a requested film length [Util screen, Film, Load Media]. If the plotter did not load the requested length add/subtract the difference to the Feeder value in the Plotter Setting dialog.
   
   Example:
   If 500 mm of film was requested, and the loaded film is measured as 508 mm, add 8 mm from the Feeder value (50 mm default) and insert 58 mm to the Feeder value.

2. The Roller value is calibrated with the plotter's side cover removed. When the plotter loads film into the drum the roller should be 5 mm from the film's end. Use a piece of paper to measure the actual distance of the roller from the film's end. The difference should be added/subtracted to the Roller value in the Plotter Setting dialog.
   
   Example:
   If 8 mm is measured from the roller to the film end, subtract 3 mm from 60 mm (default value) and insert 57 mm to the Roller value.

3. To calibrate the Film Start value expose a calibration file (lw file named "OFFSET", with horizontal and vertical rulers which starts from the beginning of the file) from the Brisque to the plotter's small cassette. If the calibration file is covered in the H direction or is not 5-7 mm from the film edge, measure the distance of the file from its proper position and add/subtract it to the Film Start field.

4. To calibrate the Film End value repeat the previous step for the medium or large cassette, and update accordingly the Film End field.

5. Expose a full format file (812 mm * 1117 mm) from the Brisque to the plotter. Check the film for complete exposure (check that the file is exposed 812 mm * 1117 mm).

1. If the file is covered in the W direction, add (if covered at the beginning of the file) or subtract (if covered at the end) {} to the W Expose Offset (Enc. ck) field.
2. If in the W direction the beginning of the file is not 20-30 mm from the film edge, add/subtract to the large cassette W home margin.
3. If in the W direction the end of the file is not 30-40 mm from the film edge, add to the large cassette and the W end margin.
4. If the file is covered in the H direction add/subtract to the H home and end margins.
5. If the Brisque provides a message ÒLayout is too big ...", check the following:

1. Check that (up to Micro - version 5.16)
2. Check that the (large cassette home margin + cassette end margin) <Media Width - 812
   If conditions i) or ii) are not met, subtract from the W or H home/end margins.

6. If a punch system is installed in the plotter, check in the Brisque that the exposable area field [punch subdialog in the expose dialog] shows 812 mm * 1117 mm. If not, check step 5 again.
7. If 1- 5 are not reconcilable, then increase the Max Film Feed and repeat the entire calibration procedure.
8. Expose the file again and check for the file's calibration.

2. Punch Calibration

The calibration of the punch system should be done only after the exposable area is calibrated.

1. After installing the punch system, expose a full format with punch requested, without alignment to punch (AutoArrange or Single with alignment "none" see figure above).
2. Check that the file is still exposed entirely after the punch system is installed. If not, repeat exposable area calibration.
3. Check that the central punch hole is exactly at the position across the center of the file. If not, calibrate the punch central hole.
4. Only after the central hole of the punch system is calibrated to the full format center, continue with the rest of the punch-system's calibration. After calibration is complete, check again exposure of a full format file and the location of its center in relation to the punch system.
5. Start the punch pivot calibration by setting the punch pivot to 820 H (Center Height), 558 W (Center Width) [NVM screen, Cri, Service Tables, Punch Settings]. Drag a full format file on an expose template, request bottom-center alignment to the punch with a -10,0 mm offset from pivot [job ticket launcher, expose dialog, punch subdialog].

1. If the Brisque announces that the file exceeds the exposable area on the left or right side, add/subtract to the punch W pivot setting (in the plotter) according to the message.
2. Initiate the plotter configuration dialog, press the "punch" button in the dialog and check that the punch pivot is identical to the pivot value entered in the plotter.
3. If the Brisque announces that the file exceeds the exposable area on the top or bottom side, change the alignment of the file now requesting bottom-center alignment, with a -10± (exceeding value), 0 mm offset from punch pivot.
4. Repeat the exposure of the file.
5. Check again that the punch central hole is exactly at the requested offset from the file's bottom center. If not, adjust the punch pivot setting accordingly. Repeat exposure after initiating the plotter configuration dialog and check offset again.