Troubleshooting; Defect Of Print Quality (Banding/Scratchy Printing/Blurred Printing) - Roland VersaCAMM VP-540 Service Notes

6 Troubleshooting

6-1 DEFECT OF PRINT QUALITY (BANDING/SCRATCHY PRINTING/BLURRED PRINTING)

Missing dot or
deflected-fired dot
appears on the test
No
To 1-10
NO CHECKING POINT
Machine is not installed in
1
an appropriate location
Media is not set up
2
correctly
Temperature of the print
3
heater is inappropriate
Bi-directinal adjustment is
4
not correct
Feed Calibration is not
5
correct
Scanning distance of the
6
Head Carriage
7
[PERIODIC CL.] setting
Wrong profile for the
8
media
9 Head Rank is not correct Set Head Rank
10
Head is out of adjustment Head Alignment
Foreign substances stuck
11
on the head
12
Wiper wears out
13
Defect of Cap Top
14
Head nozzle is clogged
15
Broken Head
16 Broken Pump
Yes
ACTION
Install in a location that is
level and stable.
Load and set up the
media correctly at the User's Manual
correct position.
Set appropriate
User's Manual
temperature
Correct setting for
User's Manual
Bidirectional Printing
Apply 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 a suitable Profile
[3-1 HEAD
REPLACEMENT]
[4-4 HEAD ALIGNMENT]
Manual cleaning. User's Manual
[3-2 WIPER
Wiper replacement
REPLACEMENT]
[3-3 CAP TOP
Cap Top replacement
REPLACEMENT]
Clean the head surface
using the cleaning stick.
(Manual Cleaning)
[3-1 HEAD
Head replacement
REPLACEMENT]
Pump replacement
Perform Normal
Cleaning
Not Improved
*Several Normal Cleanings and a Powerful
Cleaning do not improve the printing result.
To 11-16
REFERENCE
Never install the machine in a location where it is tilted or
where it may wobble or librate.
Feed is not smooth when media is tilted or tensioned unevenly
on the left and right. Reload and set up the media correctly.
When the temperature of the print heater is too high and the
ink drys too fast, it may result in banding because the dots
stay small afetr landing on media.
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 uniform 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 a printing is paused. And it may cause
uneven printing at the part before and after cleaning.
Head Rank setting affects the amount of the fired Ink. If it is
not set properly, the ink dots are not fired in appropriate sizes.
Check whether each [BIAS], [VERTICAL], [HORIZONTAL]
and [BI-DIR.DEFAULT] settings are correct.
Nozzle condition becomes poor due to the foreign substances
stuck on the surface of the Head.
Wiping does not work effectively and foreign substances left
on the head surfaces cannot be removed completely.
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 head nozzle clogging.
Generally, we do not recommend to wipe the surface of Head
with a cleaning stick. Howerver, it's worth trying before
replacing the Head. Soak the cleaning stick in cleaning liquid
fully, and then tap and scrub the surface of Head with it.
Ink suction during cleanings does not work and the nozzle
condition cannot be improved.
6-1
Improved
Solved
OUTLINE