Products descripion
Characteristics of UV flatbed printer
To most of the clients, non-UV printers are flatbed printers. At
present, eco-solvent inks are generally used in printing. If too
many prints apply eco-solvent inks, the material quality would be
deteriorated, and the adhesiveness would be poor and need coating.
Eco-solvent inks need to dry in the air because they are not easily
dried, but can easily converge in winter. The advantage of
eco-solvent inks is that their colors are better and brighter than
UV inks.
UV printer: The inks dry as soon as they are printed. Most of the
inks do not need to be coated, which spares a step in the process.
Their adhesiveness are relatively stronger and do not weaken
easily, but their colors are darker than eco-solvent inks, because
UV inks dry as soon as they are printed, which is a very short
time. The environment-friendly UV inks meet the needs of most
productions and are the mainstream development trend in present
day.
FAQs about *0 malfunctions of the universal UV flatbed printer
1. The universal UV flatbed printer prints out blank papers
In the case of universal dot matrix flatbed printer, the reasons
that the papers printed out blank mostly are dry ink ribbon, broken
ink ribbon, damaged print head, etc. The solution is to change the
ribbon or repair the print head in time. In the case of universal
inkjet flatbed printer, the malfunction of blank prints is mainly
due to jammed nozzle, empty ink cartridge, etc. The solution is to
clean the nozzle or change the ink cartridge. In the case of
universal laser flatbed printer, this kind of malfunction is
probably caused by a developing roller without toner (a developing
roller without DC bias); an ungrounded photosensitive drum that
blocks the negative charges from reaching the ground; a laser beam
that shows no effect on photosensitive drum a protective cover for
selenium drum or s laser scan that is not open, etc.
If the photosensitive drum of universal laser flatbed printer does
not rotate, there will be no image generated and printed out on
paper. Cut off he printers power source and take out the toner
cartridge, open the selenium drums (toner cartridge) protective
cover, leave a gel pen mark on the non-photosensitive parts at both
ends of the photosensitive drum before installing it back to the
printer. Open the printer to warm-up for a while, take out the
toner cartridge and see if the marker have moved (to check whether
the photosensitive drum is working properly). If the self-test
papers are printed out blank, it should be checked that has the
printer run out of toner, has the toner cartridge been installed
properly, has the sealing tape been drawn out, has the laser scan
cover been opened or blocked by foreign matters.
2. The papers printed out black
In the case of dot matrix printer, the reason of this malfunction
can be ribbon depilation; overmuch ribbon ink; smudged print head;
poor ribbon quality; the push rod that is too close, etc. First the
position of push rod should be adjusted during repair. If the
printer still malfunctions, change the ribbon and clean the print
head normally work. In the case of inkjet printer, the focus should
be on checking if the print head is damaged, if the ink tube is
cracked, if the ink type is normal, if the ink pipeline is jammed,
etc. In the case of laser printer, malfunctions are mostly caused
by ineffective corona wire, or malfunctioning control circuit,
selenium drums poor PCR conduction or neglected installation,
making the laser fire all the time, OPC voltage unable to be
discharged or charged, papers printed out black. Therefore, it
should be checked that if the corona wire is disconnected, if the
corona voltage is charged, if the beam detector in the laser beam
access is working properly, if the selenium drums PCR is
uninstalled.
3. Texts printed out incomplete or indistinct
In the case of universal inkjet flatbed printer, there may be two
types of reasons: the toners are used up, or the printer has not
been used for a long time, or the direct sunlight has dried the ink
and jammed the nozzle. The printer needs to change a new cartridge
or be injected with inks. If the cartridge is not used up or the
nozzle is confirmed jammed, detach the nozzle and sink it in warm
water for a while, prick it with a needle or shake it very hard. Be
careful, do not sink its circuit board in the water, so as to avoid
burning the printer.
In the case of universal dot matrix flatbed printer, this
malfunction may be caused by overuse of printer ribbon; a print
head that has not been cleaned for a long time; too much filth in
the printer; pins broken inside print head; the print driver
circuit malfunctions. The solution is to, first, adjust the
distance between print head and print roller, if this malfunction
still exists, try change a new ribbon. If it still does not work,
you need to clean the print head. Cleaning method: remove 2 fixed
screws on the print head, take out the print head, clean the filth
on the print head with pins or hooks. And the filth are usually
ribbon fibers accumulated in a long time. Then, drip some
instrument oil on the back of the print head where you can see the
pins, so as to clean off the filth. Print some blank self-test
pages without installing the ribbon, then put back the ribbon. This
way the problem can be solved. If this malfunction is caused by
pins broken inside the print head or driver circuit, all you can do
is change pins or driver tube.
In the case of universal laser flatbed printer, this malfunction
may be caused by aging consumable parts; OPC/MR/PCR overuse or
serious wear; TOER deterioration or contamination. Try change or
renew toner cartridge. If the printers driver is incorrect or
incompatible, or if the printer prints gibberish, etc. You can
solve the problem by changing the data line or socket, closing the
computer and printer before restarting them.
4. The printer prints faint texts
In the case of universal dot matrix printer, this malfunction is
mostly caused by dry ink ribbon; pins broken inside print head; a
push rod too far positioned. The solution is to change ribbon and
adjust push rod. In case of inkjet printer, this malfunction can be
caused by jammed nozzle; dry ink; incorrect ink type; air in the
ink tube; overhigh printer operation temperature. The solution is
to test and repair the nozzle, ink cartridge and other parts. In
the case of laser printer, faint texts may occur when the toner
cartridge has too less toners; developing rollers developing
voltage is low; toner has poor photosensitivity. The solution is to
take out the toner cartridge and shake it lightly. If the print
effect is still not improved, you should change the toner cartridge
or adjust the set of photosensitive switches below toner
cartridge.
5. Texts printed out clear on one side and blurry on another
side
This malfunction usually occurs in the case of dot matrix printer.
It can also occur in the case of inkjet printer, but the
possibility is low. The main reason of this malfunction is print
heads guide rail and print roller being unparallel, and the gap
between them are sometimes small and sometimes big. The solution is
to adjust the distance between print heads guide rail and print
roller. Method: unscrew the adjustment flaps on both sides of the
print heads guide rail, twirl the flaps counterclockwise in order
to shorten the distance, then adjust print heads guide rail and
print roller to the level that they are parallel. Note that if the
direction is right during adjustment, you can adjust them gradually
after you print some texts and see the quality. This malfunction
rarely occurs in the case of laser printer, and when occurs, it is
usually caused by misplaced toner cartridge during changing, or the
selenium drum that slightly blocks the scanning system. The
solution is to change the parts. It is also possible that this
malfunction is caused by DB/MR.
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