Kodak 1200I manual Humidifiers, Ant-StaticMats, Air Plenum Grounding, Technical Training Guide

KODAK 1200i WIDE-FORMAT PRINTING SYSTEM

2. Humidifiers

-The addition of a humidifier can solve print output problems where relative humidity (Rh) is too low (i.e. <30% Rh) and/or when mild grounding problems exist.

The addition of a humidifier can reduce the effects of ESD on printed output. If the humidity in the printing area is increased and the above symptoms disappear then a grounding issue/ESD problem is likely present, but not severe. If the addition of a humidifier solves the problem permanently then no further action may be necessary unless premature cartridge failures occur.

NOTE: Even with adequate grounding measures intact, relative humidity should typically be between

45% and 55% in a normal room temperature environment for the best printing results (ESD suppression and color control).

The suggested temperature range is 68-72 degree F. (20-22.2 degrees C.)

3. Ant-Static Mats

-The installation of Anti-Static mats below the printer have been known to help control ESD levels in the space on and around the printer.

3. Air Plenum Grounding

-In low humidity environments static build-up can occur across the air plenum and generate ESD levels which may interfere with printed output (mainly during dryer operations) if the air plenum is not completely grounded. Verify air plenum is thoroughly grounded by placing a voltmeter into a resistance scale and check electrical resistance between the Y-Arm assembly and the air plenum (connect to any screw). The normal resistance level should be 0.6 ohms or less but may vary depending on position of air plenum.

-If the electrical resistance between the Y- arm assembly and the air plenum is greater than 0.6 ohms then verify the ground strap between the right side of air plenum and the dryer mounting bracket (black) is connected. Perform resistance test across grounding strap while air plenum is in the UP and DOWN positions.

Technical Training Guide 68