Roland XJ 740 User Manual

							2-2 Loading and Cutting Off Media
Chapter 2 Operation
29
Go around to behind the printer and move the media holders all the way to the left and right.
If the diameter of the media core is two inches, detach the end caps from the media holders and
replace them with the included media flanges.
Attach the media to the media holders.
Attach the media to the left media holder.

Move the right media holder to the left and attach the media.
Load the media while the left media holder is positioned close to the left edge, as shown in the figure. Also, never
secure the media holder in place before loading the media. Loading media without performing these steps in the
proper order may make smooth media feed impossible or yield poor printing results.



Loosen the retaining
screw.Loosen the retaining
screw.
End capMedia flangeInsert the clip.
Line up the ridges
and grooves
Right media
holder Left media
holder
Fit onto this securely.
Pull out the clip.
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							2-2 Loading and Cutting Off Media
Chapter 2 Operation
30
	Grasp the location shown in the figure and align the left edge of the media with the mark.
If the media is moved too far to the right, grasp the right media holder at its outer side and shift it to the left.
CAUTIONNever attempt this operation while holding any location other than the one speci-
fied.
The media may fall from the media holder, resulting in injury.

Secure the media holders in place.
Tighten the retaining screws securely.Grip the outer
side.Grip the outer
side. Mark
Never attempt to move while holding the
inner side of the media holder.
The media may fall and cause injury.
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							2-2 Loading and Cutting Off Media
Chapter 2 Operation
31
2.Pass the media through the printer and secure it in place so that no slack occurs.
Pull out the media, pass its leading edge through between the pinch rollers and the grit rollers, and
feed it through as far as the platen.
Make sure the left edge of the media lies along the guide line.
Hold the media at the center and pull it out, being sure to keep it straight.
Make sure all areas of the media are taut.
Pull back the loading lever.
The media is secured in place.
Guide line
OK Not OK
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							2-2 Loading and Cutting Off Media
Chapter 2 Operation
32
3.Attach the media clamps and close the front cover.
Attach the media clamps.
The media clamps are magnetic, and the left and right clamps are distinct. Refer to the figure and install them at
the correct positions, taking care not to let the left and right clamps get mixed up.
Close the front cover.
Useto select ROLL.
Press.
starts to flash. When initialization ends,
remains steadily lighted, and the printable
width is displayed.
Remove when not using roll media.
If roll media is allowed to stand unused in a loaded state for an extended period, the media may sag. This can cause
poor printing quality and motor errors, so be sure to remove and store such media when not in use.Left media clamp
Align the edge of the
media with the centers
of the holes.Right media clampAlign the edge of the
media with the centers
of the holes.
How to install correctly
SETUP SHEET
      ROLL
W 1839mm
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							2-2 Loading and Cutting Off Media
Chapter 2 Operation
33
How to Cut Off Media
To cut off the media, use. You can carry this out only whenis illuminated and the top menu screen is
displayed.
Procedure
Make sureis lighted, and press and hold
for one second or longer.
The screen shown in the figure appears.
Open the front cover and detach the left and
right media clamps.
Close the front cover.
Press.
The media is cut off.
You can make the setting in the software RIP for auto-
matic media cutoff after printing has finished. For in-
formation on how to make the setting, refer to the docu-
mentation for the software RIP youre using.
Cut-off Operations
➢Be sure to detach the media clamps. Performing cutoff with the media clamps remaining attached may cause the
operation to be interrupted due to detection of the media clamps.
➢If the media clamps are present on the machine when the setting to execute automatic cutoff of the media is made
on the computer, the media clamps are detected and no cutoff operation is performed.
➢When youre performing cutoff, never use
to pull the media back. Unless the end of the media has been
pulled out to a location to the front of the platen, cutoff may not be performed smoothly.
Knife guideMedia clamp
Remove the one on
the left as well.
Cutoff is
performed at
the next print-
start position. Printed portion
REMOVE
        MEDIA CLAMPS
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							34Chapter 2 Operation
2-3 Settings for the Media Heating System
What Is the Media Heating System?
This machine is equipped with a media heating system that warms the media. You use this mainly to improve ink
adhesion and dry the ink. You can adjust the temperature settings to match the type of media and the printing speed.
WARNINGCaution: high temperatures
The platen and dryer become hot. Exercise caution to avoid fire or burns.
WARNINGRemove any loaded media or switch off the sub power when printing is not being
performed.
The continued application of heat at a single location may cause fire or produce toxic
gases.
WARNINGNever use media that cannot withstand the heat.
Doing so may result in fire or the release of toxic gases, or may degrade the media.
WARNINGNever use the platen or dryer for any purpose for which they are not intended,
such as to dry clothing.
Doing so may cause overheating, resulting in fire or accident.
Making the Temperature Setting for the Media Heating System
Procedure

Press.
The present temperature is displayed.
Press a second time.
Use
to select the device.
Useto make the setting.
Press
to enable the setting.
Press.
Press
to go back to the original screen.
By default, simply switching on the power does not make the machine warm up to the preset temperature. Pressing
to make the light come on makes the system warm up to the preset temperature.
Dryer
You use this to warm the media after
printing and speed up ink-drying.
Print heaterThis device is used mainly to improve
ink adhesion.
PreheaterThis device warms the media before
printing.
PRE          35    PRINT        35
DRY          50
DRYER           50 5050
DRYER           505555
W 1839mm
SETUP SHEET
      ROLL
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							2-3 Settings of the Media Heating System
Chapter 2 Operation
35
General Guide for the Preset Temperatures
The optimal temperature for the media heating system varies according to such factors as the type of media and
differences in the print mode. Use the following as a general guide and adjust accordingly.
General Guide for Adjustment
Preheater
Set this to a temperature that is the same as or lower than the temperature of the print heater.
You use the preheater mainly to heat media gradually. This is because media becomes more likely to shrink or wrinkle
if heated suddenly.
Print heater
You use this mainly to improve ink adhesion and inhibit smudging.
If the ink forms lumps or smudges, raise the temperature. Note, however, that a temperature that is too high may
degrade the media or cause it to wrinkle.
Dryer
When ink drying is poor, raise the temperature. Note, however, that a temperature that is too high may degrade the
media or cause it to wrinkle.
The relationship between the print mode and temperature
If smudging or poor drying occur even after raising the temperature, try using a print mode offering higher image
quality. Conversely, when you want to use a faster print mode, raise the temperature.
Amount of ink
When you change the amount of ink using the settings for your software RIP, adjusting this may yield better results. If
problems such as smudging persist even after raising the temperature, try reducing the amount of ink.
Use at an ambient temperature of 20 to 32ºC (68 to 90ºF).
If the machine is used at an ambient temperature lower than 20ºC (68ºF), then depending on the type or width of the
media, wrinkling or temperature-caused unevenness may occur. To obtain stable printing results, the machine should
be used at an ambient temperature of 20 to 32ºC (68 to 90ºF).
Examples of Preset Temperatures
➢These are only rough estimates. Make adjustments to match the media youre using.
➢Using the media heating system does not necessarily make it possible to apply ink to every kind of media. Be
sure to test in advance.
➢Results may vary greatly depending on the print mode and other factors. Make settings suited to the media.
➢When suggested settings for temperature, print mode, and other values are given, use the suggested settings.
Media
Type: Scrim banner (PVC)
Thickness: 300 to 400 µm (12 to 16 mil)
Type: Marking film (PVC, with adhesive)
Thickness: 60 to 100 µm (2.5 to 4 mil, not including backing
paper)
Temperature
Preheater: 40˚C (104˚F)
Print heater: 40˚C (104˚F)
Dryer: 50˚C (122˚F)
Preheater: 35˚C (90˚F)
Print heater: 35˚C (90˚F)
Dryer: 50˚C (122˚F)
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							36Chapter 2 Operation
2-4 Starting Printing
Getting Ready to Receive Data from a Computer
When you have finished loading media and making the temperature settings for the media heating system, then follow
the steps below. This procedure enables the machine to receive data from the computer and perform printing.
Procedure
Close the front cover.
Make surelights up.
Wait untilstops flashing and stays steadily lit.
Make sure you are at the top menu.
If you are not at the top menu, press, then press.
Printing Is Not Possible in These Situations
➢The machine does not run when the front cover is open. Also, never open it when printing is in progress. Doing so
interrupts printing.
➢Data from the computer is not accepted when
is dark.
➢Printing does not start unti
lights up.
➢Data from the computer is not accepted when you are not at the top menu.
Points Which Must Be Observed
➢Be sure to set the media clamps during printing. Otherwise the edges of the media may warp and catch on the print
heads.
➢During printing, never touch the media thats already been discharged. Doing so may obstruct media feed or cause
the media to rub against the heads, which may result in a paper jam or damage to the heads.
SET UP
HEATER CONFIG
W 1839mm
Steadily lighted Top menu
Flashing
Steadily lighted
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							37
2-4 Starting Printing
Chapter 2 Operation
Printing Tests and Cleaning
We recommend performing a printing test to check for problems such as dot drop-out before you carry out actual
printing. If problems such as dot drop-out are found, clean the print heads.
How to Perform a Printing Test
Holding downfor one second or longer prints
a test pattern.
You can print the test pattern where you want by using
to move the print-head car-
riage, then pressing
. The front cover may be
left open during movement, but be sure to close it be-
fore you press
.
ABC
Hold down for one
second or longer.
Test patternDot drop-out
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							38
2-4 Starting Printing
Chapter 2 Operation
How to Perform Cleaning
When a printing test reveals dot drop-out or the like, perform cleaning for just the group of heads that is incapable of
correct printing. Compared with performing cleaning for all heads, this can reduce the amount of ink consumed.
Procedure
Press.
Press.
Useto choose the group of heads
that is not to be cleaned.
Use
to get rid of the group dis-
play.
Repeat this procedure to display the groups of
only the heads that require cleaning.
Of groups A through C, cleaning is performed only for
the groups displayed.
Press.
Cleaning starts.
When it finishes, the screen shown in the figure ap-
pears again.
	Press.
Press
to go back to the original screen.

Perform a printing test again to make sure the dot drop-out has been corrected.
If the problem persists, try performing cleaning a second time.
If the problem doesnt go away even after performing cleaning two or three times, then try cleaning using a
different method.
 P. 54, When Head Cleaning Is Not Effective
When you want to clean all heads simultaneously
Hold downfor one second or longer. Cleaning for all heads starts automatically.
ABC
CLEANING...
>>
CLEANING
NORMAL CL.
NORMAL CL.
            A B C      
NORMAL CL.
            A    C     
NORMAL CL.
            A    C     
W 1839mm
SETUP SHEET
      ROLL
Group A Group B Group C
Printing-test results
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