Common Problems When Installing Sensors Yourself

Three primary issues are frequently encountered while installing hot runner vibration online sensors: signal interference, high-temperature compatibility, and installation stability. In particular:

1. Problems with High Temperature Failure

The most prevalent and frequently disregarded issue is this one:

When using standard ambient temperature sensors, the sensing device may burn out soon after the hot runner begins to run, making it totally incapable of producing data.

At extreme temperatures, regular sealant may melt and distort, causing the sensor to become loose and perhaps contaminating the runner.

2. Abnormal Signals

The hot runner's heating coil may cause electromagnetic interference if a high-temperature shielded cable is not used or if the wiring is not adequately shielded. This could lead to frequent and severe data jumps and fluctuations, making steady measurements impossible.

The recorded vibration frequency and amplitude may differ significantly from the actual vibration condition due to loose sensor fit and wide installation gaps.

At high temperatures, sensor zero-point drift can be caused by a lack of temperature adjustment, which can lead to overall data offset and totally erroneous monitoring results.

3. Problems with the Installation Structure

Inappropriate Installation Location: Sensors placed too far from the manifold outside the mold may not be able to measure the actual vibration of the hot runner, or they may be placed too close to the heating rod or flow channel, which could lead to premature failure from extended high temperatures.

Inappropriate Fixing Screw Torque: An excessively high torque may harm the sensor package, while an excessively loose screw may cause the sensor to loosen.

Unsecured Cables: Signal interruption and wiring breakage may result from repeated pulling during mold opening and closing.

4. Problems with Debugging

Unreasonable threshold settings may cause alarms to fail when they should, resulting in numerous false alerts under normal circumstances, or incorrect zero-point calibration may cause the baseline to exceed limitations after power-on, resulting in false alarms.