PHT Nozzle Assessment System: Automatic Print Head Tester Nozzle Analysis and Scoring

The PHT Nozzle Assessment System is an optional advanced system for the Print Head Tester (PHT) that automatically analyzes individual print head nozzles, identifies suboptimal nozzles, and generates an overall print head health score.

Instead of relying only on visual inspection of a nozzle test, users receive an objective, software-based assessment of individual nozzle condition and the print head as a whole.

Developed by Digital Sign Technologies Inc. (DST), the PHT Nozzle Assessment System expands the capabilities of the Print Head Tester from independent print head testing into detailed, automated nozzle analysis.

It is designed for industrial inkjet users who need a faster and more consistent way to answer a critical question:

Is this print head ready for production?

What Is the PHT Nozzle Assessment System?

The PHT Nozzle Assessment System is an optional component of the Print Head Tester (PHT) for automatic and objective print head nozzle evaluation.

The Print Head Tester creates a physical nozzle test that shows how the print head is actually jetting and printing. The PHT Nozzle Assessment System then uses advanced software to analyze that test at the individual-nozzle level.

The system:

• Automatically detects and evaluates individual print head nozzles

• Identifies optimal and suboptimal nozzles

• Shows where nozzle-performance issues are located

• Provides detailed nozzle-level condition information

• Evaluates the condition of the print head as a whole

• Generates an overall print head health score

• Allows results from multiple print heads to be reviewed and compared

• Creates a more repeatable and objective print head quality-control process

In simple terms:

The Print Head Tester performs the print test.The PHT Nozzle Assessment System analyzes the nozzles and scores the print head.

Why Automatic Print head Nozzle Assessment Matters

A print head does not have to fail completely to create production problems.

A print head may continue printing while individual nozzles are missing, weak, deflected, partially restricted, or otherwise performing below the required level.

Depending on the printing application, suboptimal nozzles can contribute to:

• Missing lines

• Banding

• Uneven print density

• Inconsistent image quality

• Defective printed parts

• Additional cleaning cycles

• Wasted ink and substrate

• Production interruptions

• Premature print head replacement

A conventional nozzle test lets an experienced operator visually inspect nozzle performance.

The PHT Nozzle Assessment System adds automatic analysis and objective measurement to that process.

Instead of only asking:

“Does this nozzle test look good?”

the user can see which nozzles are suboptimal and obtain an overall numerical assessment of the print head.

See the Condition of Individual Print head Nozzles

PHT Nozzle Assessment System showing the condition of individual print head nozzles. The software automatically analyzes the nozzle test and identifies optimal and suboptimal nozzles so users can quickly locate areas requiring attention.

The nozzle condition view provides a granular representation of the print head.

Rather than simply indicating that a print head has a problem, the system helps show where the problem is occurring at the nozzle level.

This can be particularly useful when evaluating a print head:

• After cleaning

• After print head recovery

• After storage

• Before installation

• Before an important production run

• When receiving a new print head

• When troubleshooting print-quality problems

• When deciding whether additional recovery is required

• When comparing multiple print heads

What Is a Print head Health Score?

A print head health score is an overall numerical assessment generated from the nozzle analysis performed by the PHT Nozzle Assessment System.

Individual nozzle information provides the detail.

The overall score provides a fast summary of the print head's condition.

This combination allows an operator to move from:

Overall print head condition → individual nozzle condition

without relying exclusively on subjective visual interpretation.

A numerical score can also help companies establish more consistent internal criteria for deciding whether a print head should:

• Return to production

• Undergo another cleaning or recovery cycle

• Be retained as a backup print head

• Be compared with another available print head

• Be removed from service

The score does not replace the nozzle-level analysis. It summarizes it and makes the results easier to evaluate and compare.

Compare Nozzle Evaluation and Scores Across Multiple Print heads

PHT Nozzle Assessment System displaying the nozzle evaluation results and print head health scores of multiple tested print heads, allowing users to review and compare print head condition.

For companies managing many industrial print heads, evaluating one head at a time is only part of the challenge.

They also need a consistent way to compare print heads.

The PHT Nozzle Assessment System provides evaluation and scoring information that can help users determine which print heads are in the best condition and make more informed decisions about recovery, reuse, installation, or replacement.

This can be particularly valuable for:

• Industrial inkjet manufacturers

• Print shops

• Packaging and label printers

• Functional printing operations

• Electronics and PCB printing

• Textile printers

• Ceramic printing operations

• Print head manufacturers

• Printer OEMs

• Ink manufacturers

• R&D laboratories

• Print head service and refurbishment centers

• Dealers and technical service organizations

Generate Detailed Print head Reports and Group Reports

The PHT Nozzle Assessment System does more than analyze nozzle condition on screen. It can also generate structured reports that document the results of individual print head evaluations and summarize results across multiple print heads.

These reports help turn nozzle analysis into a practical quality-control record that can be reviewed, compared, shared, or retained for future reference.

Individual Print head Report

The Individual Print head Report provides a documented assessment of a single tested print head.

It can include the key information generated during the nozzle analysis, allowing the user to review the condition of the print head in a clear and consistent format.

Example of an individual print head report generated by the PHT Nozzle Assessment System, showing detailed nozzle evaluation results and the overall print head score.

This type of report can be useful for:

• Documenting print head condition before or after recovery

• Recording the result of a print head test

• Comparing before-and-after recovery results

• Supporting internal quality-control procedures

• Maintaining a history of print head performance

• Sharing test results with technicians, managers, customers, or other stakeholders

For organizations that recover, service, refurbish, or manage valuable industrial print heads, the report provides a more objective record than a visual nozzle pattern alone.

Print head Group Report

Example of a PHT Nozzle Assessment System group report showing the condition of a print head across multiple testing and cleaning stages.

The Print head Group Report is designed to show how the condition of a

print head changes over time.

For example, users can compare:

• The initial condition of the print head

• The condition after the first cleaning or recovery cycle

• The condition after subsequent cleaning or recovery cycles

• The final condition before the print head is returned to production or removed from service

By placing these results together in one report, users can clearly see the progression of print head improvement throughout the recovery process.

This makes it easier to determine whether each cleaning cycle is producing measurable improvement and whether additional recovery is worthwhile.

The group report can help users answer practical questions such as:

• How much did the print head improve after the first cleaning?

• Did a subsequent recovery cycle produce further improvement?

• Is the overall print head score improving?

• Has the print head reached an acceptable condition for production?

• Is additional cleaning likely to provide further benefit?

This is particularly valuable when the Print Head Tester and PHT Nozzle Assessment System are used together with the Print Head Doctor, because the user can document the complete recovery progression:

Initial Test → Recover → Retest → Reassess → Recover Again if Needed → Final Verification

Instead of seeing only a single before-and-after result, the Print head Group Report provides a documented history of the print head’s condition throughout the recovery process.

This gives users an objective way to measure improvement, evaluate the effectiveness of each recovery cycle, and make more informed decisions about when a print head is ready to return to production.

From Nozzle Analysis to Documented Quality Control

Together, the Individual Print head Report and Print head Group Report extend the PHT Nozzle Assessment System beyond real-time analysis.

The workflow becomes:

Test → Analyze → Score → Report → Compare → Decide

This gives users both the detailed nozzle-level information needed for technical evaluation and the documented results needed for broader print head management.

Rather than relying only on a visual test or an operator’s interpretation, users can create a consistent record of what was tested, how the nozzles performed, and how the print head scored.

PHT Nozzle Assessment System vs. Visual Nozzle Inspection

Both methods use the printed nozzle result, but they provide different levels of information.

The purpose is not to eliminate the value of seeing the actual printed test.

It is to combine the physical test result with automated, objective analysis.

What Is the Print Head Tester (PHT)?

The Print Head Tester (PHT) is an independent, off-press industrial inkjet print head testing system developed by Digital Sign Technologies.

It allows users to test a print head outside the production printer and see its actual nozzle performance before deciding whether to install it.

The PHT can be used to evaluate print heads:

• After cleaning

• After recovery

• After storage

• After shipment

• Before installation

• When new

• Before critical production runs

The system produces a print test in approximately three minutes, uses standard photo paper, and can operate using the customer's preferred ink or test ink.

This allows print head condition to be evaluated independently rather than discovering nozzle problems after the head has already been installed in a production machine.

Learn more about the Print Head Tester and how independent print head testing can help prevent production problems in Print Head Tester: Reliable Print head Testing for Flawless Prints and Maximum Efficiency.

The PHT Can Also Operate as an Ink Tester

The same platform used for the Print Head Tester can also operate as an Ink Tester.

This is important because print quality and jetting problems do not always originate from the print head.

Sometimes the variable is the ink.

When operating as an Ink Tester, the system uses a known-good print head so that the ink itself can be evaluated against a known print head reference.

This allows users to determine how a particular ink performs with a particular print head before introducing that ink into production.

The Ink Tester can be used to:

• Evaluate ink jettability with a particular print head

• Test new ink formulations

• Evaluate alternative ink suppliers

• Compare ink batches

• Perform incoming ink quality control

• Stress-test ink

• Evaluate ink under different printing conditions

• Identify potential jetting or clogging concerns before production

Ink testing can be completed in approximately three minutes, providing a fast way to evaluate ink performance before committing production equipment and production print heads.

Learn more at InkTester.ai.

Print Head Tester vs. Ink Tester vs. PHT Nozzle Assessment System

The three functions address different questions:

Together, they make it possible to independently evaluate both major variables involved in inkjet jetting performance:

the print head and the ink.

The PHT Nozzle Assessment System adds a further layer by automatically analyzing the individual nozzles and providing an objective score.

PHD + PHT / Ink Tester: An End-to-End Print head Maintenance, Testing and Ink-Validation System

The PHT is also part of a broader end-to-end print head maintenance system developed by Digital Sign Technologies.

The system combines:

• Print Head Doctor (PHD)

• Print Head Tester (PHT) / Ink Tester

• PHT Nozzle Assessment System

Each performs a different part of the print head maintenance and quality-control process.

1. Print Head Doctor — Recover the Print head

The Print Head Doctor (PHD) is used to clean, unclog, maintain, and recover industrial inkjet print heads.

It addresses the recovery side of the workflow.

Function: Recover

2. Print Head Tester — Test and Verify the Print head

After recovery—or whenever print head condition needs to be established—the Print Head Tester independently tests the print head outside the production printer.

It provides the physical evidence of how the print head is actually jetting and printing.

Function: Test and Verify

3. PHT Nozzle Assessment System — Analyze and Score the Nozzles

The optional PHT Nozzle Assessment System analyzes the PHT nozzle test, evaluates individual nozzle condition, identifies suboptimal nozzles, and provides an overall print head health score.

Function: Analyze and Score

4. Ink Tester — Validate the Ink

When the PHT platform is configured as an Ink Tester, it evaluates how an ink performs with a known-good print head before the ink is introduced into production.

Function: Validate the Ink

The Complete Workflow: Recover → Test → Analyze → Score → Validate → Install

The complete Digital Sign Technologies workflow can be summarized as:

Recover

Recover and clean the print head with the Print Head Doctor.

Test

Independently test its actual jetting and printing performance with the Print

Head Tester.

Analyze

Automatically analyze individual nozzle condition with the PHT Nozzle Assessment System.

Score

Generate an overall print head health score and evaluate whether the head meets your requirements.

Validate

When required, validate ink performance using the Ink Tester.

Install

Return a tested print head to production with significantly more information about both the print head and ink.

Recover → Test → Analyze → Score → Validate → Install

Learn more about how the systems work together in Print Head Doctor, Print Head Tester & Ink Tester: The Complete End-to-End Print head Maintenance System.

Why Independent Print head Testing Is Important

Testing a print head independently from the production printer helps isolate one of the most important variables in the inkjet system.

When a print problem occurs on a production machine, many factors may potentially be involved, including:

• Print head condition

• Ink

• Ink-delivery system

• Electronics

• Waveform or other settings

• Mechanical alignment

• Other printer components

Testing the print head independently can help determine whether the print head itself is performing correctly.

Ink testing provides another level of isolation by allowing the ink to be evaluated using a known-good reference print head.

The PHT Nozzle Assessment System adds another level again by providing detailed and objective analysis of the individual nozzles.

This creates a much clearer diagnostic process:

Is it the print head?Is it the ink?Which nozzles are affected?How good is the print head overall?

Before and After Print head Recovery: Measure the Difference

One of the most useful applications of the PHT Nozzle Assessment System is evaluating a print head during the recovery process.

A typical workflow can be:

Test → Assess → Recover → Retest → Reassess

The initial PHT test establishes print head condition.

The print head can then be recovered using the Print Head Doctor.

After recovery, the print head is tested again with the PHT.

The PHT Nozzle Assessment System can then analyze the new nozzle condition and provide an updated score.

This creates an objective before-and-after comparison that can help show the actual result of the recovery process.

For print head service departments, refurbishers, manufacturers, and companies maintaining large print head inventories, this can provide useful quality-control information that is difficult to obtain from visual assessment alone.

Who Is the PHT Nozzle Assessment System For?

The PHT Nozzle Assessment System is designed for organizations that want objective, repeatable print head nozzle evaluation rather than relying exclusively on manual visual inspection.

It can be particularly useful for organizations that:

• Operate expensive industrial inkjet print heads

• Manage multiple print heads

• Recover or refurbish print heads

• Need to document print head condition

• Need consistent quality-control procedures between technicians

• Test print heads before production

• Evaluate print heads after cleaning

• Develop or manufacture industrial inkjet systems

• Develop or manufacture printing inks

• Perform print head or ink R&D

• Want quantitative information to support print head reuse or replacement decisions

Frequently Asked Questions About the PHT Nozzle Assessment System

What is the PHT Nozzle Assessment System?

The PHT Nozzle Assessment System is an optional system for the Print Head Tester that automatically analyzes a printed nozzle test, evaluates individual nozzle condition, identifies suboptimal nozzles, and generates an overall print head health score.

What does the PHT Nozzle Assessment System measure?

It evaluates the condition and performance of individual print head nozzles and provides an overall assessment of the print head.

Does the PHT Nozzle Assessment System detect bad or suboptimal nozzles automatically?

Yes. The system uses software-based analysis to automatically identify and evaluate individual nozzles rather than requiring the operator to rely only on visual inspection.

Does it provide an overall print head score?

Yes. The system generates an overall print head health score in addition to detailed nozzle-level information.

Can it evaluate individual nozzles?

Yes. Individual-nozzle assessment is one of the principal functions of the system. Users can see where optimal and suboptimal nozzles are located within the print head.

Can I compare multiple print heads?

Yes. The evaluation and scoring interface allows the results of multiple tested print heads to be reviewed and compared.

Is the PHT Nozzle Assessment System a standalone machine?

No. It is an optional component of the Print Head Tester (PHT) for customers who require automatic and objective nozzle evaluation.

What is the difference between the Print Head Tester and the PHT Nozzle Assessment System?

The Print Head Tester physically tests how the print head jets and prints and produces the nozzle test.

The PHT Nozzle Assessment System automatically analyzes that nozzle test, evaluates individual nozzles, and generates an overall print head health score.

How long does a Print Head Tester test take?

The Print Head Tester can provide test results in approximately three minutes.

Can the PHT test both a print head and ink?

Yes. The platform can operate as either a Print Head Tester or an Ink Tester, depending on its configuration.

As a Print Head Tester, the print head is the primary variable being evaluated.

As an Ink Tester, a known-good print head is used so that the ink itself can be evaluated.

What is the difference between a Print Head Tester and an Ink Tester?

The Print Head Tester determines whether a print head is performing correctly.

The Ink Tester determines how an ink performs with a particular known-good print head.

They are based on the same testing platform but serve different testing objectives.

Can the PHT Nozzle Assessment System be used after print head cleaning?

Yes. One of its most useful applications is evaluating nozzle condition after cleaning or recovery to determine the effectiveness of the process and whether further recovery is required.

How do the Print Head Doctor and Print Head Tester work together?

The Print Head Doctor recovers and cleans the print head. The Print Head Tester then independently tests the recovered print head. The optional PHT Nozzle Assessment System analyzes and scores the nozzle condition.

Together, they provide an end-to-end recovery and verification workflow.

What is an end-to-end print head maintenance system?

Digital Sign Technologies' end-to-end system combines the Print Head Doctor for recovery, Print Head Tester for independent verification, PHT Nozzle Assessment System for automatic nozzle analysis and scoring, and Ink Tester for ink validation.

This allows users to address print head recovery, testing, nozzle assessment, and ink evaluation before returning components to production.

From Visual Print head Testing to Objective Nozzle Intelligence

A printed nozzle test provides essential evidence of how a print head is performing.

The PHT Nozzle Assessment System goes further by automatically interpreting that result.

It provides:

• Detailed individual-nozzle analysis

• Automatic detection of suboptimal nozzles

• Objective print head evaluation

• An overall print head health score

• Comparison between tested print heads

• A more consistent basis for print head maintenance decisions

Combined with the Print Head Doctor, Print Head Tester, and Ink Tester, the PHT Nozzle Assessment System adds a new analytical layer to a complete industrial inkjet print head maintenance and testing workflow.

Recover the print head. Test it independently. Analyze every nozzle. Score the result. Validate the ink. Know before you install.

Learn More

Print Head Tester:PrintHeadTester.com

Ink Tester:InkTester.ai

Print Head Doctor:PrintHeadDoctor.com

Complete End-to-End Print head Maintenance System:Print Head Doctor, Print Head Tester & Ink Tester: The Complete End-to-End Print head Maintenance System

To learn more about the PHT Nozzle Assessment System, Print Head Tester, Ink Tester, or Print Head Doctor, discuss your application, or schedule a demo, contact us via the Contact Form, WhatsApp, or email.