6-3 SHIFTING IN PRINTING / COLOR SHIFTING
NO
CHECKING POINT
ACTION
REFERENCE
OUTLINE
3
Encoder Module is
dirty/broken
Clean or replace
Encoder Module
When Encoder Module is not read correctly, printing
position may shift.
4
Head is out of
adjustment
Head Alignment
[4-4 HEAD
ALIGNMENT]
If the Heads are not aligned or Horizontal adjustment is
not performed properly, the color shifting occurs.
5
Bad contact of Flexible
Cable
Refix / Replace the
Flexible Cable
If the Flexible Cable is not fixed correctly, the Head moves
incorrectly and results in the shifting in printing.
6-4 INK DROPS ON THE MEDIA
1
Foreign substances
Manual Cleaning
User's Manual
When foreign substances such as fiber dust are stuck on
the surface of the Head, the ink sometimes leaks from it.
Wipe the surface of Head with a cleaning stick.
2
Media strikes Head
Use the media clamps/
Replace with suitable
media
If media tends to curl or become bumpy due to the ink
absorption and/or the Heater temperature, the Head
sometimes strikes the media and it causes the ink
dropping problem.
3
Static electricity of
the media
Perform [PERIODIC
CL]
User's Manual
If media produces electrostatic easily, the ink tends to
remain on the head surface while printing and results in
ink dropping. When this is set to [5 min] to [990 min],
automatic cleaning is performed while printing and it may
prevent the ink dropping.
Also, connecting to ground or humidifying the room may
reduce the static electricity generated on the media.
4
Wiper wears out
Wiper Replacement
User's Manual
Cleaning does not work effectively with worn wiper.
Therefore, foreign substances stuck on the head surface
cannot be removed completely and the ink flows through it
and results in ink dropping.
5
Broken Ink Tube
Ink Tube Replacement [3-7 INK TUBE
REPLACEMENT]
When the Ink Tube is broken, it is not possible to keep the
ink line air tight and results in ink dropping.
6
Broken Head
Head Replacement
[3-1 HEAD
REPLACEMENT]
When a head is broken mechanically such as a crack, it is
not possible to keep the ink line air tight and results in the
ink dropping.
6-5 VERTICAL BANDING
NO
CHECKING POINT
ACTION
REFERENCE
OUTLINE
1
Encoder Scale is dirty Clean / Replace
Encoder Scale
[3-12 ENCODER
SCALE
REPLACEMENT]
When there is scratch or dirt on the Encoder Scale, the
printing image could be affected and the vertical bandings
could appear at the position where there is scratch or dirt.
2
LM Guide is dirty
Clean LM Guide
When the sliding resistance in the motion of the Head
Carriage increases partly due to some dirt on the LM
Guide, it may affect the printing at the position where there
is dirt and the vertical banding may appear.
3
There is dirt in teeth of
the gear
Clean the gear
When there are foreign substances on the teeth of the
gear, the movement of the Head Carriage changes at the
position where there is dirt. And it results in the periodical
vertical banding.
4
Printing direction
Change Bi-direction to
Uni-direction, or select
a higher resolution
mode
Depends on the media or the printing color, vertical
banding is more likely to appear. This is the capability of
the machine and cannot be solved completely. The
symptom can be minimized by changing printing direction
to Uni-direction or selecting a higher resolution.
5
Kind of media
Change the media
Depends on the media or the printing color, vertical
banding is more likely to appear. This is the capability of
the machine and cannot be solved completely. The
symptom tends to move visible with the media that has
vertical hairline finishing on it.
6-4
Summary of Contents for VersaUV LEJ-640
Page 32: ...2 4 MAIN BOARD_Arrangement Diagram Soldering Side ...
Page 43: ...2 15 HEAD BOARD_Arrangement Diagram Soldering Side ...
Page 54: ...2 26 SERVO BOARD_Arrangement Diagram Soldering Side ...
Page 63: ...2 35 SUB BOARD B_ Arrangement Diagram Component Side ...
Page 70: ...2 42 2 6 INK SYSTEM BOARD INK SYSTEM_Arrangement Diagram Component Side ...
Page 282: ...4 74 9 Fix the I S Cover I S Cover Hook Screw Screw ...
Page 306: ...7 2 Unpacking ...