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Color calibration

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Color calibration Color calibration enables your printer to produce consistent colors with a particular substrate type, even if printheads, ink cartridges, and environmental conditions change. Color calibration sets the ink restriction and linearization, which varies with the drop weight of the printhead. This calibration has been designed to provide consistency as the printhead ages (drop-weight degradation) and from one printer to another. For example, to reach a maximum cyan density of 0.6, one printhead may require 3 drops while another one may require 3.5 drops (lower drop weight). For generic substrate profiles, there are no factory-reference color-calibration values in the printer or within the presets: the first calibration for each substrate sets the color reference for future calibrations. The future calibrations will therefore try to match the colors of the first calibration. In this way you maintain consistency as the printhead ages. Good nozzle health is important, and the printheads should also be as new as possible for best performance when you make the first calibration. It is also important to have the printheads well aligned (see Align the printheads on page 125), and to make sure the substrate is advancing correctly (see Substrate-advance compensation on page 134), otherwise the color pattern may appear blurry or with slightly different colors. NOTE: Substrates can be color-calibrated only if they are cloned, white, opaque, non-porous, and wider than 61 cm (24 in). Backlit substrates cannot be color-calibrated (they are not opaque). NOTE: Color calibration is enabled when the carriage is configured for colored inks only. White-ink carriage configurations cannot launch color calibration. To start color calibration from the Internal Print Server, tap the Substrate Library icon in the app bar, and select the substrate you want to calibrate from the list on the left-which must have been previously cloned, because generic substrates cannot be calibrated. Once you can see your substrate in the center of the screen, tap the ellipsis icon , then Edit > Set color reference/Calibrate, and the color calibration starts. IMPORTANT: To calibrate a flexible substrate, you must calibrate a roll on a spindle, not just a loose sheet of flexible substrate. NOTE: Color calibration is not recommended when the carriage beam is in a higher position than normal. The calibration process is fully automatic and can be performed unattended after you have loaded substrate of the type you wish to calibrate. The process takes about 15 minutes and consists of the following steps: 1. The color calibration test chart is printed, which contains patches of different densities of each ink used in your printer. 132 Chapter 9 Printer calibration

Section	Page
Introduction	8
Welcome to your printer	8
Printer accessories and consumables	9
Documentation and useful links	9
Safety precautions	10
Main components	20
Printer software	22
Turn on the printer for the first time	22
Turn the printer on and off	23
Move the printer	24
Printer status beacon	25
HP Internal Print Server	27
Start the Internal Print Server	27
Internal Print Server widgets	28
Printer status and alerts	29
Update the printer’s firmware and software (Internal Print Server)	30
Internal Print Server settings and preferences	34
RIP distribution	35
Install and configure the RIP software	36
Install ONYX software and set up the driver	36
Install Caldera software and set up the driver	38
Printing workflows integration	41
Introduction to JDF	41
Benefits of working with JDF for file submission	41
Creating JDF job tickets	41
What printer information can be communicated to an MIS?	42
How to integrate the printer into the Caldera RIP	42
How to integrate the printer into the Onyx RIP	42
Job submission methods	42
How to integrate the printer into an MIS system or production control software	43
Handle the substrate	44
Supported substrate types	44
Supported HP substrates	46
Substrate tips	47
Color consistency	48
Substrate configurations	49
Prepare to print	50
Substrate edge holders	51
Load a roll onto the spindle	53
Load a roll into the printer	55
Double-sided printing	63
Output-platen light	67
Consistency mode (optimize for tiling)	67
Optimize for ink consumption	68
Create and manage print jobs	70
Add a new print job	70
Substrate presets	72
Use a new substrate	72
Prepare the printer for a new substrate	72
Add a substrate preset	72
Online substrate manager	78
Edit a substrate preset	83
Remove a substrate preset	86
Export multiple presets	86
Job properties	86
Set the carriage beam position	88
Handle the ink system	90
Ink system components	90
How to work with ink system components	93
Printing with white ink (2700W only)	120
Printer calibration	132
Align the printheads	132
Possible difficulties with printhead alignment	138
Color calibration	139
Color consistency between different HP Latex 2700 series printers	141
Color profiles	141
Substrate-advance compensation	141
Calibrations specific to one substrate preset	146
Recommended calibrations after particular events	146
Accessories	147
Accessory compatibility	147
Spindle	147
Dual-roll printing	148
Jumbo dual-roll kit	150
Diverter roller	151
In-line slitters	152
Substrate saver	154
Ink collector	159
Roll to free fall	164
Roll to collector	164
Hardware maintenance	166
Safety precautions	166
Maintenance resources	166
Summary of maintenance operations	168
How to perform maintenance operations	169
Diagnostics	266
Troubleshoot substrate issues	269
Substrate cannot be loaded successfully	269
Substrate has jammed	269
Substrate is not attached to the core and/or spindle	270
Substrate is not flat	271
Spindle latch suddenly opens during printer operation	271
Substrate advances with a loud continuous sound of vibration	271
There is skew or telescoping on the output spindle	272
There are wrinkles and ink smears on the substrate	273
There are ink marks on the substrate	276
Substrate sticks to the platen	276
There are physical marks on the substrate	277
There are drops of ink on the substrate	278
Print is shorter than expected	279
How to achieve better consistency between jobs of the same length	279
Collector stops winding	280
Collector occasionally fails to work correctly	280
Collector winds in the wrong direction	281
Substrate is detached or winds around the collector in the wrong direction	281
There is skew or telescoping on the collector	281
Substrate has jammed on the collector	281
Troubleshoot print-quality issues	282
General advice	282
Basic and advanced troubleshooting	283
Troubleshoot ink cartridge and printhead issues	298
Ink cartridges	298
Printheads	299
Printhead cleaning roll errors	304
Troubleshoot other issues	305
Printer does not start	305
Printer does not print	305
Printer cannot be restarted from the Internal Print Server	305
Printer seems slow	306
Request to reinitialize the carriage	306
Internal Print Server cannot detect the printer	306
Color calibration fails	306
Movable Slot System sensor errors	307
When you need help	309
HP Customer Care	309
HP PrintOS: the cloud-based platform for print specialists	309
Printer specifications	330
Functional specifications	330
Physical specifications	331
Memory specifications	332
Power specifications	332
Air supply requirements (pneumatic spindle)	332
Environmental specifications	333
Acoustic specifications	333
Flexible substrate recommendations	335
Predefined substrate settings	335
Self-adhesive vinyls	335
PVC banners	336
Papers	336
Textiles	337
Flexible films	337
Print-quality-troubleshooting summary table	339
Glossary	340

Match case Limit results 1 per page

Color calibration

Color calibration enables your printer to produce consistent colors with a particular substrate type, even if

printheads, ink cartridges, and environmental conditions change.

Color calibration sets the ink restriction and linearization, which varies with the drop weight of the printhead. This

calibration has been designed to provide consistency as the printhead ages (drop-weight degradation) and from

one printer to another. For example, to reach a maximum cyan density of 0.6, one printhead may require 3 drops

while another one may require 3.5 drops (lower drop weight).

For generic substrate proﬁles, there are no factory-reference color-calibration values in the printer or within

the presets: the ﬁrst calibration for each substrate sets the color reference for future calibrations. The future

calibrations will therefore try to match the colors of the ﬁrst calibration. In this way you maintain consistency as

the printhead ages.

Good nozzle health is important, and the printheads should also be as new as possible for best performance

when you make the ﬁrst calibration.

It is also important to have the printheads well aligned (see

Align the printheads

on page

125

), and to make sure

the substrate is advancing correctly (see

Substrate-advance compensation

on page

134

), otherwise the color

pattern may appear blurry or with slightly diﬀerent colors.

NOTE:

Substrates can be color-calibrated only if they are cloned, white, opaque, non-porous, and wider than

61 cm (24 in).

Backlit substrates cannot be color-calibrated (they are not opaque).

NOTE:

Color calibration is enabled when the carriage is conﬁgured for colored inks only. White-ink carriage

conﬁgurations cannot launch color calibration.

To start color calibration from the Internal Print Server, tap the Substrate Library icon

in the app bar, and

select the substrate you want to calibrate from the list on the left—which must have been previously cloned,

because generic substrates cannot be calibrated. Once you can see your substrate in the center of the screen, tap

the ellipsis icon

, then

Edit

Set color reference/Calibrate

, and the color calibration starts.

IMPORTANT:

To calibrate a ﬂexible substrate, you must calibrate a roll on a spindle, not just a loose sheet of

ﬂexible substrate.

NOTE:

Color calibration is not recommended when the carriage beam is in a higher position than normal.

The calibration process is fully automatic and can be performed unattended after you have loaded substrate of

the type you wish to calibrate.

The process takes about 15 minutes and consists of the following steps:

The color calibration test chart is printed, which contains patches of diﬀerent densities of each ink used in

your printer.

132

Chapter 9

Printer calibration