Primescan 2 Tapping Sensor Not Working: What It Usually Means

If your Primescan 2 tapping sensor is not working, the scanner may still capture normally while tapping no longer starts, stops, or controls acquisition the way it did before. That pattern is useful. It suggests the scanner is basically alive, and the question is whether the problem lies in technique, setup, software, or the tap-sensing function itself.

Most practices can sort this out in a few minutes with simple isolation checks. If the tap control stays unreliable after those checks, and especially if the problem follows the scanner from room to room, a scanner-side fault becomes more plausible. At that point, a diagnosis from Repair.Dental is a reasonable next step.

What the Tapping Control Does and What "Not Working" Looks Like

Dentsply Sirona has described Primescan 2 as allowing scan control through tapping on the scanner. In practice, this lets the clinician manage acquisition without reaching for the screen, mouse, or foot control.

"Not working" can mean several different things:

Taps are ignored. The scan won't start or stop.
Taps work inconsistently. Some register, others don't.
Taps trigger at the wrong time. The scan starts or stops unexpectedly.
Taps work in one workflow but not another.

Write down which of these you see. Each points toward a different cause.

Signs this is an isolated control problem

Scanning, image quality, and software connection are all normal.
Starting and stopping from the software still works.
Only the tap response has changed.

Signs it may be something broader

The scanner drops its connection or disconnects.
Scanning is slow, lagging, or freezing.
The workstation or software behaves oddly with other functions.

If your symptoms look broader, a different diagnostic path applies. Our intraoral scanner repair guides cover those neighboring problems separately.

Primescan 2 Tapping Sensor Not Working on Repair Guru

Start With Technique and Handling

Before suspecting hardware, rule out the simplest variable: how the tap is being delivered.

A tap that worked easily for one clinician may fail for another because of grip, hand position, or glove type. A changed handling habit can look like a sensor fault.

Try this:

Have a second team member, ideally one who previously used the function successfully, try the tap control.
Hold the scanner in a neutral, steady position before tapping.
Tap deliberately and consistently rather than repeatedly.
Test with a fresh pair of gloves.

If one user succeeds and another doesn't, the answer is probably technique or handling. If nobody can trigger the control, move on.

Rule Out Software, Settings, and Workflow Factors

A scanner that otherwise performs normally can still stop responding to tap commands because of how the software is currently behaving. Because Primescan 2 is built around a connected software ecosystem, check these before blaming hardware:

Is the scanner fully connected and ready, rather than mid-reconnection?
Did the problem begin after a software update or settings change? Review any scanner control settings your version exposes.
Is the function behaving differently in a particular workflow or step? Some controls may only respond at certain points in a session.
Has the software, workstation, or scanner been restarted recently?

A full, orderly restart of the scanning session is a safe clinic-level step. Do not use unofficial workarounds or modify system files.

Repair clue: If the tap control worked until a specific software change and returns after reversing or correcting that change, the scanner is unlikely to be the cause.

Does the Problem Follow the Scanner?

This is the most informative test. The goal is to find out whether the symptom stays with the room and equipment or travels with the Primescan 2.

What You Observe	What It May Suggest	Recommended Next Step
Taps work in another operatory	Workstation, setup, or environment variable in the first room	Compare the two setups and test the first room again
Taps fail on a different compatible workstation	Less likely a single-computer issue	Continue to sleeve and handling checks
Taps work with a different clinician only	Technique or handling	Retrain or standardize grip
Taps fail everywhere, with every user	Scanner-side fault becomes more likely	Document and consider professional diagnosis

A scanner that fails identically in two rooms with two users has eliminated most local explanations. That is why this test matters more than any single setting.

Check the Sleeve and the Scanner Surface

Handling hardware can affect how a tap is delivered, so inspect these items:

Sleeve fit. Make sure the sleeve or cover is seated correctly and not bunched, stretched, or overly thick at the tapping area.
Surface condition. Look for residue, debris, or disinfectant film on the scanner body.
Visible damage. Cracks, dents, or loose-looking seams are significant.

Compare behavior with and without the sleeve if your infection control protocol allows it for a brief test. Do not remove housing, pry open panels, or attempt to clean internally. Internal access is a technician-level matter.

If the function returns when a different sleeve is fitted, the issue was mechanical interference rather than a faulty sensor.

Intermittent or Constant: Why the Pattern Matters

How the failure behaves can sharpen the diagnosis.

Constant failure. The scanner never responds to taps. This is easier to document and, once the room, user, and software checks are cleared, is more consistent with a scanner-side issue.

Intermittent failure. Taps work sometimes. This can be more frustrating, because intermittent symptoms can come from handling, software state, or a hardware fault that appears only under certain conditions.

For intermittent symptoms, keep a short log of:

the date and time;
the operatory and workstation;
the clinician;
whether the sleeve was changed;
whether the problem coincided with a restart or update.

A log that shows the failure persisting across several variables is far more persuasive than a general report that it "acts up."

Consider Whether There Was a Physical Event

Think about whether the scanner has been dropped, knocked, or stressed. A bump that left no visible mark can still matter, and a fault that begins after an impact is more concerning than one with no obvious trigger.

I can't say that a drop causes a specific tap-sensing failure, since that depends on the unit and the event. But a new symptom following a physical incident is a good reason to stop repeating the same tests and request professional evaluation.

Avoid shaking, squeezing, or repeatedly tapping hard to "wake" the function. That can add damage rather than reveal the cause.

When Repair Becomes the Reasonable Next Step

Professional diagnosis is appropriate when:

the control fails with multiple users;
it fails in more than one room or on more than one compatible workstation;
software restarts and settings checks have not helped;
the sleeve and surface checks changed nothing;
the problem followed a physical event;
other scanner functions are beginning to show symptoms as well.

At that stage, further trial and error mostly costs chair time. A technician can examine whether the issue is repairable. You can review our Dentsply Sirona intraoral scanner repair options or our broader intraoral scanner repair services to see how we approach evaluations.

If you'd like to describe your symptoms first, contact Repair.Dental with your findings from the tests above. A clear description of what you ruled out helps narrow the diagnosis.

Preparing the Scanner for Evaluation

If you decide to send the scanner in, a little preparation avoids delays.

Note the symptom, when it started, and what you tested.
Include whether it fails with all users and in all rooms.
Mention any recent physical events or software changes.
Follow your usual cleaning and disinfection protocol before shipping.
Pack the scanner securely.

You can print a shipping label for intraoral scanner repair to begin the process, and once it's in transit you can track your repair without having to ask for updates.

Practices that want to weigh the experience of others can also read customer reviews of Repair.Dental before deciding.

Primescan 2 Tapping Sensor FAQs

Can I still scan if the tap control isn't working?

In many cases, yes, because scanning can usually be started and stopped through the software. But if the tap control was part of your workflow, losing it can slow procedures and add handling steps.

Why does the tap control work for one clinician and not another?

Different grip, hand position, or glove type can change how a tap is delivered. If the function works for some users and not others, technique is a more likely cause than a scanner fault.

Does a software update affect Primescan 2 tap control?

It can, in the sense that settings or behavior may change after an update. If the symptom began right after a change, review settings and workflow before assuming hardware failure.

Is a Primescan 2 touch sensor problem always a hardware fault?

No. Technique, sleeve fit, surface residue, and software state can all produce similar symptoms. A hardware fault is more likely when the problem persists across users, rooms, and workstations.

Should I keep tapping harder to make it respond?

No. Extra force won't reliably help and could stress the scanner. If a normal, deliberate tap isn't recognized after the checks above, it's better to get a diagnosis.

Where can I find answers to other repair questions?

Our repair FAQ covers general questions about the repair process.

A Primescan 2 Tap Control Problem: Know When to Stop Troubleshooting

When a Primescan 2 still scans but no longer responds reliably to taps, the cause may be handling, sleeve fit, software state, or a scanner-side fault. Rule out the room, workstation, user, sleeve, and recent changes first. Those checks cost little and often resolve the issue.

A fault becomes more likely when the same failure follows the scanner across rooms, users, and compatible workstations, or began after a physical event. At that point, more trial and error mainly costs chair time.

If you've reached that point, Repair.Dental can evaluate the Primescan 2 and tell you whether it has a repairable fault. That means less downtime, fewer repeated tests, and a faster return to reliable scanning. Start from the Repair.Dental homepage or reach out with your findings, and we'll help you decide on the next step.

For more insights on professional dental equipment repair, please visit Repair.Dental or follow us on Facebook & Instagram.

Primescan 2 Tapping Sensor Not Working: Why Tapping No Longer Controls the Scan