Missing Dot Or Deflected-Fired Dot Appears When Performing Printing After Leaving The; Media Skew; White/Gloss Ink Hairline - Roland VersaUV LEJ-640 Service Notes

6-6 MISSING DOT OR DEFLECTED-FIRED DOT APPEARS WHEN PERFORMING PRINTING AFTER
LEAVING THE PRINTER UNUSED FOR A LONG TIME
NO CHECKING POINT
Check the main power
1
switch
The printer is not
installed in an
2
appropriate
temperature

6-7 MEDIA SKEW

NO CHECKING POINT
Media is not set
1
straight to the printer
Pinch rollers are not
2
set correctly (rigid
media)
Warped media (rigid
3
media)
4 Grit Roller is dirty
Pinch Roller is worn
5
out
6 Grit Roller is loose

6-8 WHITE/GLOSS INK HAIRLINE

NO CHECKING POINT
The printer is not
installed in an
1
appropriate
temperature
2 Print length
ACTION
Do not switch off the
User's Manual
main power
Keep the room
temperature under 35º
C
ACTION
Setup Media again User's Manual
Reset the media User's Manual
Change the media
Clean the Grit Roller
Replace the Pinch [3-13 PINCH ROLLER
Roller REPLACEMENT]
Fix the Grit Roller
ACTION
Keep the room
temperature 25ºC or
above
Set the print length to
500mm and below
REFERENCE
When the main power is off, the maintenance flushing is
not performed and it may cause the Head nozzle clogging.
Make sure to power on/off with only the sub power switch
for daily use.
If UV ink is exposed under high temperature for a long
time, its viscosity can increase and it may cause the head
nozzle clogging. Keeping the room temperature under 35º
C is recommended.
REFERENCE
The most effective measure against Media shifting is to set
Media straight to the printer. Especially on lengthy printing,
small tilt of Media setup results in big Media shifting while
printing.
Loading roll media improperly to the printer or Take-up unit
may result in Media shifting. Follow the procedures
described in the User's manual and load roll media
correctly.
When you use the sheet media, be careful with the usage
of the front table and the rear table.
If the pinch roller at the edge of the media is not fully
placed on the media, the media will not feed properly.
If the media is severely warped, media is not fed
smoothly.
When dust such as pieces of vinyl is stuck to the Grit
Roller, ability to hold Media decreases and it results in
Media shifting. Use a brush to clean the Grit Roller.
When pinch rollers wear out, ability to hold media
decreases and it results in media shifting. Referential time
for replacing Pinch Roller is 24 months.
REFERENCE
The hairlines are likely to appear under the temperature of
25ºC or below. If the hairlines appear, perform the normal
cleaning. The hairlines should mostly disappear.
The hairlines are likely to appear from around 500mm
length. Set the print length to 500mm and below.
6-5
OUTLINE
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