Field Service Manual
December 2003
Page 247 of 276
Testjobs - Film3&4 Geometric Accuracy check
File Document: Geomtric Accuracy check.doc (on SilverWriters and
BG7x8xx laser plotters.)
Short explanation on Geometric accuracy check.
1. Repeatability.
•
Loading cyclus
•
Developer (speed, temperature and dry temperature stable)
•
Films
•
Room conditions
•
Film relaxation
→
Compare length of first slow scanline with last
slow scanline.
2. Parallellogram distortion.
•
Parameters 8 & 9
3. Ysize = f (carriage position) in the corners.
•
Ysize table
4. Yoffset = f (carriage position).
•
Yoffs table
5. Ysize = f (carriage position) in the middle.
•
Ysize table
6. Making Ysize at 100E6 equal to Xsize.
•
Parameter 96 (drum circumference)
7. Eccentricity correction.
•
Secor (program which autmomatically calculates the eccentricity
of the drum/rsf measuring scale)
8. Linear corrections.
Parameters 97 & 98
Remark:
A incorrect accuracy around the drum can be caused by a dirty RSF encoder.
Содержание SilverWriter 800
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