An SPK107 touchscreen that loses alignment after a successful calibration is not operating normally. The documented case progressed from delayed drift to an immediate offset after startup calibration; repeated calibration restored alignment only temporarily. The evidence supports service evaluation rather than continued recalibration as a permanent remedy.
Identify the Calibration-Drift Pattern
At startup, the calibration menu completes normally and the application initially responds at the touched position. After tens of minutes or several hours, the pointer appears approximately 1–2 cm from the finger position, making HMI buttons difficult to select. In a later test, the pointer appeared about 3 cm below the touch point immediately after calibration and application startup.
| Observed state | Touch response | Engineering conclusion |
|---|---|---|
| Immediately after a successful calibration | Initially aligned in some tests | Calibration can temporarily restore operation |
| After tens of minutes or hours | Pointer displaced by about 1–2 cm | Alignment is not remaining stable |
| Later startup test | Pointer about 3 cm below the touch point | Fault can persist immediately after calibration |
Separate Temporary Recovery From Resolution
Recalibration may return the pointer to the correct location, but recurrence shows that it does not resolve the underlying defect. Treat the panel as faulty when a completed calibration cannot maintain touch-to-pointer alignment during operation.
Capture the Evidence Before Service
- Run the startup calibration and confirm that it completes.
- Compare the physical touch point with the displayed pointer immediately after application startup and again during operation.
- Record whether the offset starts immediately or after operating for tens of minutes or hours, including its direction and measured distance.
- Provide the panel serial number and the recorded behavior when arranging evaluation through an OWEN service center.
Escalate the SPK107 for Service
The reported behavior was explicitly classified as abnormal, with delivery to an OWEN service center recommended. The available evidence does not identify the electrical, mechanical, firmware, or software mechanism responsible, so assigning a specific root cause would be speculative. Service personnel must inspect the panel to determine the defective element and the applicable repair or warranty disposition.
FAQ
Is SPK107 touchscreen calibration drift normal?
No. A pointer offset of approximately 1–2 cm after tens of minutes or hours was classified as abnormal behavior requiring service evaluation.
Why does recalibrating the SPK107 only fix the touch offset temporarily?
The evidence shows that recalibration can restore alignment, but the offset returns and may later reach about 3 cm immediately after calibration. The specific technical cause was not established.
What should I send with an SPK107 touchscreen service request?
Provide the panel serial number and document when the offset begins, its direction, its measured distance, and whether recalibration temporarily restores alignment. Arrange inspection through an OWEN service center.