I. Manual RC Parameter Locking Steps
Pre-process Status Confirmation: Confirm that the hot runner is currently in a stable production range, with no significant temperature increases/decreases, and that the interference characteristics have remained stable for two consecutive hours.
Pre-record the optimal RC parameters for the current adaptation: resistance value, capacitance value, and filter cutoff frequency. Confirm that the temperature reading does not jump under these parameters.
System Menu Operation: Enter the temperature controller's main menu, find the "Signal Filtering Settings" sub-option, and select "Dynamic RC Filtering Mode."
Switch the default "Automatic Adaptation" mode to "Manual Locking" mode. Enter the pre-confirmed target RC parameters in the pop-up parameter input box.
After submitting the parameters, select "Enable Locking." Confirm that the status bar displays the "RC Locked" icon, indicating that the locking operation is effective and the dynamic RC network no longer automatically switches gears based on interference frequencies.
II. Post-Locking Stability Verification Method
Short-Term Basic Stability Verification: Continuously observe the temperature controller reading for 15 minutes. Confirm that the temperature does not fluctuate irregularly by more than ±1℃, and that the temperature control accuracy meets the current process requirements.
Check the internal operating log of the temperature controller to confirm there is no RC range switching record and the locked state was not automatically released by the system.
Simulated Interference Stability Verification: Briefly start surrounding high-interference equipment such as frequency converters and servo motors on-site to simulate the maximum interference condition, confirming no abnormal fluctuations in temperature readings and no RC range jumps.
Observe the filter output signal with an oscilloscope to confirm the target interference signal attenuation is ≥20dB and no abnormal spike signals enter the sampling circuit.
Long-Term Operational Stability Verification: Continuously track the production process for 8 hours to confirm the temperature control curve is smooth, with no overshoot or oscillation, and stable product yield.
Record the locked RC parameters, corresponding processing materials, and production scenario, and save them in the process parameter file for direct reuse in subsequent batches.
III. Anomaly Troubleshooting and Fallback Rules
If a temperature reading jump occurs after locking, immediately unlock and restore automatic mode, rematch the optimal RC parameters, and execute the locking and verification process again.
The total RC time constant is kept ≤200ms throughout the process to avoid excessive filtering that could lead to temperature measurement lag, overshoot, and loss of control.
