Dolev 4news; Dolev 4press; Dolev 4press V - Dolev 4press - white lines 20-300 micron

Author/Submitter: R. Elkayam (10/09/97)
Document Released: 10/09/97

Product Family: Imagesetters / Platesetters

Problem:
Sometimes the white lines problem will appear as a missing data line during stop spiral. We can get one or more lines in different widths ( 20 to 300 microns ).

The image dimension in the Height direction does not change.
Data seems to be missing.

Using a microscope we observe a solid black line on the edge of the white lines, as though the carriage stopped and expose continued on the same few data lines.

Reason:
This is caused by freedom in the coupling between the lead screw and the dynamic optic.

Solution:
Repair or replace the coupling.

ECO 23888 was done on this coupling in order to solve that problem.

In order to fix the coupling please tighten the screws ( # 4 in the drawing ) and make sure that the pins ( # 2 in the drawing ) are held by the outside rings ( # 1 and # 5 in the drawing )

The COUPLING part number : 507B2G789

Important: Do Not Replace the whole Lead Screw.

Workaround:
Reduce Spinner Speed