I. Rapid Hardware Link Troubleshooting
Trigger Line Segment-by-Segment Check: Use an oscilloscope to measure the signal at the end of each slave channel's trigger line sequentially. Compare this to the arrival time of the master channel's trigger signal. The channel with a significantly larger signal delay is the abnormal channel causing the synchronization deviation.
Terminal Contact Check: Plug and unplug the external trigger input terminals of each slave channel one by one, observing the change in the synchronization deviation value. The channel whose synchronization returns to normal after plugging and unplugging is the abnormal channel causing the deviation due to poor contact.
II. Parameter Grouping and Comparison Troubleshooting
Group Isolation Test: Divide all slave channels into groups of 2-3, connect them to the synchronization link in batches, and test the synchronization deviation of each group. Quickly locate the group containing the abnormal channel, and then verify each channel individually within that group to accurately pinpoint the abnormal channel.
Parameter Reset Verification: Reset the delay parameters of all channels to 0, and then fine-tune the delay of each channel. Record the change in synchronization deviation after each adjustment. The channel with a sudden change in deviation value is the abnormal channel.
III. Precise Waveform Comparison for Channel Identification
Using the multi-channel acquisition function of an oscilloscope, simultaneously input the output signals of the main channel and all slave channels. Display the rising edge positions of the waveforms from all channels at once. The channel whose waveform deviates significantly from the main channel's time reference is the abnormal channel causing the synchronization deviation.
Read the phase time difference of each channel. The channel with a deviation value much greater than that of any other individual channel is the source channel of the synchronization deviation.
IV. Final Functional Verification
Connect the suspected abnormal channel to the synchronization system alone, disconnecting all other channels. Test the synchronization deviation between this channel and the main channel individually. If the deviation value far exceeds the acceptable threshold, it can be confirmed with 100% certainty that this channel is the abnormal channel causing the overall synchronization deviation.
This identification method is fully adaptable to hot runner industrial field operation and maintenance scenarios, quickly and accurately locating the abnormal channel causing the synchronization deviation, significantly shortening troubleshooting time.
