Troubleshooting central lubrication system: pressure, stroke, flow (HowTo + FAQ)
With a structured approach, most disruptions can be quickly isolated. Here are the most important check points, typical causes and measures.
1) Printing problems Symptom: Pressure too low/drop Causes: Leakage, air in the system, clogged filter, pump wear Measures: Check for leaks/venting, change filters, test pump/drive, verify limit values in HMI/PLC 2) Stroke/Cycle Error (Progressive) Symptom: Hub sensor reports no/incorrect cycles Causes: Blockage at the distributor, air, sensor/cable problem Measures: Clean/inspect, test sensor wiring, replace dispenser 3) Implausible flow Symptom: Flow too high/low Causes: Air entry, viscosity deviation (temperature), miscalibration Measures: Bleed, check medium/temperature, calibrate sensor Limit values & messages Set OK/Warning/Alarm per measured value (pressure/stroke/flow) time window for start/stop & define messages Visualize trends in HMI/PLC → early detection More basics: Central lubrication è Components: Control & monitoring è Help: Contact FAQ
Only air after a fat change
Bleed the system carefully, check the returns; If necessary, increase the interval briefly.
Filter change intervals
By operating hours/trend values; Change earlier if there is heavy abrasion/dirt.