The filter monitoring and volumetric flow control integrated into the VisionX series of convection welding systems from Rehm Thermal Systems ensure efficient waste management and consistent cooling performance, thus contributing to creating a stable and safe process atmosphere for welding.
When the solder paste melts inside the process chamber, process gases can be produced that can contaminate the cooling modules and the fine filter. As a result, the volumetric flow rate of the cooling process (which must be as constant as possible) is limited or reduced, and therefore it is no longer possible to pass enough process gas through the filter. Less gas also means less cooling capacity, which can lead to an increase in the outlet temperature or a change in the cooling gradient of the components. For a safe and stable process, however, the correct outlet temperature and a constant cooling gradient of the soldered component are of paramount importance.
As part of predictive maintenance, the active reset filter monitoring system automatically detects, via the integrated control system, if the flow rate falls below the level individually set by the customer for their production needs. This indicates that a filter change is imminent. Until the change is made, the system automatically adjusts the flow rate through active reset to maintain the process by increasing cooling capacity. To do this, the set gas flow rate in the process chamber is continuously compared to the actual flow rate.
Active reset filter monitoring ensures high process reliability and an optimal reflow soldering process under constant flow conditions.
