SEA Electronics - Filling of lubricant bottles

The customer wanted to modernize two packaging lines of lubricant cans.

The system, based on the analog processing of the weight measurements and the filling management by the PLC, was no longer precise enough:

• Weight measurements too sensitive to vibrations
• Architecture responsible for the important and variable response time between the weight measurement and the filling valves control.

The packaging line supports the labeling, filling and capping of lubricant bottles.

To improve filling rate and dosing accuracy, SEA has chosen to:

• Double the bottles filling line.
• Combine fast-rate pre-dosing based on time, followed by fine dosing based on weight and managed by an eNod4-D dosing controller.

In this architecture, the S7-1200 PLC controls the overall operation of the 2 packaging lines: Pre-dosing by time, labeling and capping bottles.

Each eNod4-D controller supports:

• The signal processing of load cells, especially digital filtering to overcome vibrations.
• Complete management of the weight dosing cycle.