Roland SJ-740 Manuel d'utilisateur télécharger pdf (Page 109)

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Chapter 6 What to Do If

6-2 Attractive Printing Is Impossible

Printed Results Are Coarse or Contain Horizontal Stripes

Do the print heads show dot drop-out?

Carry out a printing test and make sure no dot drop-out

occurs. If dot drop-out is present, perform head cleaning.

☞ P. 37, "Printing Tests and Cleaning"

☞ P. 54, "When Head Cleaning Is Not Effective"

Is the head height appropriate?

Printing when the [HEAD HEIGHT] menu item is set to

"HIGH" is coarser than when set to "LOW." Keep this set to

"LOW" except when changing it is necessary, such as when

you're using thick media.

☞ P. 81, "Adjusting Head Height to Match Media Thickness"

Have you carried out feed correction?

Large misalignment in the amount of feed of the media may

result in printing that seems coarse or contains horizontal

stripes. Either make the setting on the computer to match

the type of media you're using, or make the setting for cor-

rection on the printer.

☞ P. 85, "Performing Feed Correction to Alleviate Horizontal Bands and the Like"

Did the media become slack during feed correction?

Slackness of the media during feed correction makes accu-

rate correction impossible. Carry out feed correction with

the media pulled taut.

☞ P. 85, "Performing Feed Correction to Alleviate Horizontal Bands and the Like"

After feed correction, was the media pulled back?

Never pull the media back after carrying out feed correc-

tion. Doing so may cause the correction results not to be

applied properly and result in horizontal stripes.

☞ P. 85, "Performing Feed Correction to Alleviate Horizontal Bands and the Like"

Have you carried out bidirectional correction?

When you are performing bidirectional printing, use the

[ADJUST BI-DIR] menu item to carry out correction. The

optimal adjustment value may vary, depending mainly

on the thickness of the media. Set or select an adjustment

value that is suited to the media.

☞ P. 82, "Correcting for Misalignment in Bidirectional Printing"

☞ P. 83, "Correcting for Misalignment in Bidirectional Printing More Precisely"

Is the media heating system at a suitable tempera-

ture?

If the ink forms lumps or smudges, raise the temperature.

Note, however, that a temperature that is too high may de-

grade the media or cause it to wrinkle.

☞ P. 34, "Settings for the Media Heating System"

Is the temperature of the room too low?

The media heating system may not warm up sufficiently

when the ambient temperature is less than 20˚C (68˚F). Also,

even when the media heating system reach its preset tem-

peratures, adequate effectiveness may not be apparent if

the media is thoroughly chilled. Before printing, allow the

media to come to room temperature.

Is the print mode suitable?

If attractive printing is impossible even when the media heat-

ing system is at a high temperature, try using a higher-qual-

ity print mode.

Depending on the media, smudging may occur when using

a high-quality print mode, and results may also vary greatly

depending on the settings of your software RIP (such as the

color-profile selection). Make settings suited to the media

you're using.

Is the printer installed in a level and stable location?

Never install the machine in a location where it is tilted or

where it may wobble or experience vibration. Also make

sure that the print heads are not exposed to moving air.

These factors may lead to missing dots or reduced printing

quality.

Is the media loaded and set up correctly?

If the media is not loaded and set up correctly, media feed

may not be smooth, or printing may be adversely affected.

☞ P. 111, "Media Wrinkles or Shrinks, or Feed Is Unstable"

Are the settings for the [PRESET] menu item ap-

propriate?

If the settings selected with the [PRESET] menu item are not

suitable for the type of media, printing may be adversely

affected. Choose settings optimized to the media you're us-

ing.

☞ P. 90, "Saving Optimized Media Settings As Preset Values"

☞ P. 91, "Loading a Saved Preset"

Colors Are Unstable or Uneven

Did you shake the ink cartridges gently before in-

stalling them?

Before you install a new ink cartridge, gently shake the car-

tridge.

Is the media wrinkled?

If the media is wrinkled and comes loose from the platen,

colors may be uneven or printing reduce may suffer.

☞ P. 111, "Media Wrinkles or Shrinks, or Feed Is Unstable"

Is the media sagging?

Performing printing using sagging roll media makes uneven

colors more likely.

Was printing paused partway through?

When printing is paused, the coloring at the seam may be

altered when printing resumes. Avoid pausing printing. With

the factory-default settings, printing pauses when an ink

cartridge runs empty. Before you perform lengthy printing,

check the amount of ink remaining in the ink cartridges.

Printing may also pause when data is not sent from the com-

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Roland SJ-740 Manuel d'utilisateur Page 109

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