Quick answer: Kiss Technologies typically recommends annual calibration of Kiss-manufactured mold oscillation sensors. Many plants coordinate sensor calibration with planned maintenance, using a second set of sensors so one set can remain in service while the other is being calibrated.
Accurate mold oscillation data starts with accurate measurement. Stroke, frequency, waveform, and other calculated oscillation parameters are only as reliable as the sensor data behind them.
But calibration is only one part of understanding mold oscillator performance.
Calibration confirms that the sensor is measuring accurately. Oscillation monitoring and diagnostics show what the oscillator is actually doing.
Understanding that distinction helps maintenance and operations teams make better use of mold oscillation data and identify whether an unexpected measurement points to the sensor, the oscillator, or an actual change in operating performance.
How Often Should Mold Oscillation Sensors Be Calibrated?
For Kiss Technologies mold oscillation sensors, we typically recommend annual calibration.
Annual sensor calibration provides a practical baseline for maintaining confidence in measurement accuracy as part of a plant’s preventive maintenance program.
Plants can often coordinate calibration with scheduled mold or oscillator maintenance. Maintaining two sets of sensors makes this easier: one set can remain in service while the other is sent for calibration, allowing the sets to be rotated without interrupting normal monitoring.
Importantly, normal changes in the casting process—such as changes in casting speed, steel grade, or oscillation settings—do not by themselves mean that a sensor needs to be recalibrated.
Those process changes may change what the sensor measures. They should not change whether the sensor measures it accurately.
When Is a Good Time to Calibrate Mold Oscillation Sensors?
In addition to establishing an annual calibration schedule, plants can use normal maintenance activities to make calibration easier to manage.
During planned mold or oscillator maintenance. Scheduled maintenance can provide a convenient opportunity to remove one set of sensors for calibration and install a second set.
When sensors are already being removed. If sensors are being removed as part of other maintenance work, that can be an efficient time to rotate them through calibration rather than creating a separate maintenance event.
When measurements do not make sense. If measured stroke, frequency, waveform, or other oscillation values appear inconsistent with known mechanical operation, sensor condition and calibration can be evaluated as part of the investigation.
An unexpected measurement does not automatically mean that a sensor is out of calibration. It may indicate an actual change in oscillator performance. The objective is to determine which one.
Calibration and Oscillator Performance Are Not the Same Thing
This is an important distinction when evaluating mold oscillation in continuous casting.
A properly calibrated sensor tells you that the measurement is accurate.
It does not tell you that the oscillator is performing correctly.
A mold oscillator can develop mechanical or hydraulic problems while the sensors measuring its movement remain properly calibrated. Likewise, an unusual oscillation measurement may be evidence of an actual change in oscillator performance rather than a sensor problem.
An effective mold oscillation maintenance program therefore needs to answer two different questions:
1. Can we trust the measurement?
2. What does the measurement tell us about actual oscillator performance?
Calibration addresses the first question. Oscillation monitoring and diagnostics address the second.
What Can Mold Oscillation Monitoring Tell You?
Actual mold movement can differ from commanded or expected oscillation behavior. Measuring that movement gives maintenance and process teams information about how the oscillator is really performing.
Depending on the monitoring system and application, mold oscillation measurements can be used to evaluate:
- Stroke
- Frequency
- Waveform
- Oscillation consistency
- Negative strip time and other calculated oscillation parameters
Changes or inconsistencies in these measurements can provide a reason to investigate the oscillator, measurement system, or operating conditions.
The objective is not simply to collect more data. It is to know whether the mold is moving the way you think it is.
Mold oscillation is also commonly written as mould oscillation outside North America, but both terms refer to the controlled movement of the mold during continuous casting.
Periodic Measurement or Continuous Mold Oscillation Monitoring?
How a plant monitors mold oscillation depends on how much visibility it needs.
KT450 FieldMOMS provides portable mold oscillation measurement for periodic diagnostics. Kiss Technologies FieldSERVICE can also provide on-site measurement and evaluation of oscillator performance. Periodic diagnostics are useful for preventive maintenance, troubleshooting, commissioning, and establishing the actual performance of an oscillator.
KT500 OnlineMOMS provides continuous online mold oscillation monitoring. Instead of evaluating oscillator performance only during scheduled measurements, KT500 continuously measures mold movement during production.
Continuous monitoring does not replace sensor calibration. The two serve different purposes:
Calibration verifies the measurement.
Continuous monitoring shows what the oscillator is doing over time.
Together, they provide a more complete understanding of mold oscillator performance.
Why Does Continuous Oscillation Data Matter?
A periodic measurement provides a valuable snapshot of oscillator performance. But oscillator behavior can change between scheduled checks.
Continuous monitoring allows plants to see how stroke, frequency, waveform, and other oscillation characteristics behave during actual production. That gives maintenance and process teams operating data they can use to identify changes in oscillator behavior rather than relying only on commanded settings or waiting for the next scheduled measurement.
With CasterANALYTICS, oscillation data can also be viewed alongside live casting data and compared with historical performance under similar operating conditions, including grade, casting speed, strand, and other parameters.
This context helps users determine whether current conditions are consistent with historical performance and identify when and under what operating conditions meaningful variations occur.
What About Mold Friction?
Mold friction provides another source of information about mold and casting behavior, but it is important to understand how the value is obtained.
Some systems provide an inferred friction value or index rather than directly measuring force.
The KT500F can be configured to provide measured friction using force information from load cells or, depending on the oscillator configuration, hydraulic pressure. This provides measured force data associated with mold friction rather than relying only on an inferred friction indicator.
Sensor calibration, mold oscillation measurement, and measured friction answer different questions. Together, they can provide a clearer picture of mold and oscillator performance.
A Practical Mold Oscillation Maintenance Strategy
For Kiss Technologies mold oscillation sensors, the starting point is straightforward: typically calibrate annually.
Plants can make that schedule easier to maintain by coordinating calibration with planned maintenance and keeping a second set of sensors available. Alternating sensor sets allows one set to be calibrated while the other remains available for operation.
Periodic diagnostics or continuous monitoring can then be used to evaluate the performance of the oscillator itself.
A practical approach is:
Annual sensor calibration → Rotate sensor sets during planned maintenance → Periodically diagnose oscillator performance → Continuously monitor where greater visibility is needed
The objective is not calibration for its own sake. It is having confidence that the oscillation data your team relies on accurately represents what the mold is doing.
Frequently Asked Questions About Mold Oscillation Sensor Calibration
How often should mold oscillation sensors be calibrated?
Kiss Technologies typically recommends annual calibration for Kiss-manufactured mold oscillation sensors. Plants can coordinate calibration with planned maintenance and rotate between two sensor sets to keep sensors available for operation.
Do changes in casting speed or steel grade require sensor recalibration?
No. Changes in casting speed, steel grade, or oscillation settings may change the mold movement being measured, but they do not by themselves mean that the sensor requires recalibration.
Does a calibrated oscillation sensor mean the oscillator is working correctly?
No. Calibration confirms that the sensor is measuring accurately. Mold oscillation monitoring and diagnostics are used to evaluate the actual performance of the oscillator.
What is the difference between periodic and continuous mold oscillation monitoring?
Periodic measurement provides a snapshot of oscillator performance at a specific time. Continuous monitoring measures mold movement during production, allowing changes in oscillation behavior to be identified and evaluated over time.
Talk to Kiss Technologies about mold oscillation measurement and monitoring for your caster, or demo the Oscillation Calculator.