Troubleshooting; White Fine Line / Banding / Missing Dot / Scratchy Printing / Blurred Printing - Roland VersaCamm VS-640 Service Notes

6 Troubleshooting

6-1 WHITE FINE LINE / BANDING / MISSING DOT / SCRATCHY PRINTING / BLURRED PRINTING

Missing dot or
deflected-fired dot
appears on the test
pattern.
No
Go to 1 to 13
NO CHECK
The machine is not
1
installed in an appropriate
location
The media is not set up
2
correctly
Temperature of the Print
3
heater / Dryer is
inappropriate
The media is not
4
appropriate
Bi-directional adjustment is
5
not correct
FEED CALIBRATION is
6
not correct
Scanning distance of the
7
Head Carriage
8
[PERIODIC CL.] setting
Wrong profile for the
9
media
10
Head Rank is not correct
11
Head is not adjusted
Ink tubes are not bundled
12
correctly
Ink agitation in the ink
13
cartridge
14
Defect of Cap Top
15
Air inside the ink damper
16 Foreign substances
Yes
ACTION
Install in a location that is
level and stable offering
good operating conditions
Load and set up the media
User's Manual
at the correct position
Set appropriate
User's Manual
temperature
Use other media
Correct the setting for
User's Manual
Bidirectional Printing
Correct Calibration User's Manual
Set the [FULL WIDTH S]
User's Manual
to [FULL]
Set [PERIODIC CL.] to
User's Manual
[NONE] or [Page]
Use the suitable profile
[3-1 HEAD
Set Head Rank
REPLACEMENT]
[4-3 HEAD
Adjust Head
ADJUSTMENT]
Correct the order of ink [3-20 INK TUBE
tubes in the saddles REPLACEMENT]
Shake the cartridges
User's Manual
gently
[3-5 CAP TOP
Replace Cap Top
REPLACEMENT]
[3-2 DAMPER
Perform [CHOKE CL]
REPLACEMENT]
Perform Manual Cleaning User's Manual
Perform Normal
Cleaning
Not Improved
*Several Normal Cleanings and a Powerful Cleaning did not
improve the printing result.
Go to 14 to 23
REFERENCE
Never install the machine in a location where it is tilted or where
it may wobble or librate.
Feed is not smooth when the media is tilted or tensioned
unevenly on the left or right. Reload and set up the media
correctly.
When the temperature of the print heater is too high and the ink
dries too fast, it may result in banding because the dots stay
small after landing on media.
When the temperature of the print heater is too low and the ink
dries too slow, it may result in black banding because the dots
stay large and overlap each other after landing on media.
The substrate which stretches or shrinks considerably or the
one which does not absorb the ink efficiently cannot be used.
If the calibration is not correct, white fine line caused by gaps or
dark line caused by overlapping appears.
Set [FULL WIDTH S] to [FULL] to equalize the heating time on
each pass. This may improve printing quality.
When this is set to [1 min] to [990 min], self cleaning is
performed while printing is paused. And it may cause uneven
printing before and after cleaning.
Head Rank setting affects the amount of the ink fired. If it is not
set properly, the ink dots are not fired in appropriate sizes.
Check whether [BIAS] setting is correct.
Ink tubes incorrectly bundled in the saddles pull the print head
upward, that may tilt the print head.
The message to shake the cartridges is displayed periodically. If
you do not follow the message, the ink generates high or low
density inside to bring about inappropriate printing result.
Cleaning does not work effectively and the nozzle condition
cannot be improved. Also, if the head is not capped correctly,
the head dries and it may cause the nozzle clog.
If the ink damper has the air inside, the ink is supplied
intermittently. Therefore, it causes missing dots or deflected
dots.
Nozzle condition becomes poor due to the foreign substances
stuck on the surface of the Head.
6-1
Improved
Completed
OUTLINE