Predictive maintenance & condition monitoring
effective resiDue ManageMent through integrateD filter Monitoring
Optimum soldering results depend not only on the actual melting process of the solder paste. Cooling the assembly to be soldered plays an important role in soldering highly complex electronic components. The filter monitoring – including volume flow control integrated in the convection soldering systems of the Vision series from Rehm Thermal Systems – ensures effective residue management and constant cooling capacity, thereby supporting stable and safe performance of the soldering process.
contamination of the cooling modules and the fine filter. The volume flow of the cooling process, which should be as constant as possible, is reduced by these contaminants. Less volume flow means less cooling capacity at the same time, which can lead to an increase in the outlet temperature or to a changed cooling gradient at the assemblies. However, for a safe and stable process, the correct run-out temperature and a constant cooling gradient of the soldered assembly are of great importance. The filter monitoring with active readjustment
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automatically detects via the integrated control system when the volume flow falls below the level individually set by the customer to meet his production requirements. This is an indication that the filter is about to be changed. Until this change is made, the system automatically readjusts the volume flow by means of active readjustment in order to continue cooling the
assemblies within the specified process window by increasing the cooling capacity. For this purpose, the set gas flow rate in the cooling zones is continuously compared with the value actually determined. The filter monitoring with active readjustment
thus guarantees a high level of process reliability and ensures an optimum reflow soldering
Preventing Machine DowntiMe S
ICK’s sHub sensor hub is a smart add- on to its HIPERFACE DSL single-cable motor feedback system, which turns
servo motors into a source of data for real- time condition monitoring and predictive maintenance of machines. The compact SICK sHub sensor hub fits
snugly as an extension to SICK EDS/EDM35 motor feedback encoders to send temperature, vibration, position, and speed data via HIPERFACE DSL to the servo controller. The SICK sHub can therefore assure early detection of critical mechanical failures, such as ball bearing damage or motor imbalance, to pre- empt machinery downtime. SICK’s revolutionary HIPERFACE DSL (Digital-
Servo-Link) One Cable technology has been adopted by more than 60 major motor and drive manufacturers worldwide and is now widely recognised as the industry-standard protocol for digital motor feedback. HIPERFACE DSL enables reliable data transfer between drive and motor in servo drive systems via two wires which are directly integrated into the motor power cable. In common with all SICK HIPERFACE DSL
Instrumentation Monthly October 2021
encoders, the EDS/EDM35 incorporate a winding temperature sensor input and have a service-life histogram inside them for condition monitoring. The sHub sensor hub adds a built-in vibration sensor and enables all data to be routed synchronously to the drive without the need for additional cabling. Darren Pratt, SICK UK Encoder product
manager, explains: “Armed with the real-time data collected with the sHub, machinery maintenance teams can take corrective action ahead of time, for example if the servo motor is imbalanced, and can monitor vibration and temperature trends to detect early signs of component damage. “The sHub therefore offers an attractive
proposition for machine builders who want to offer smart condition monitoring as a premium service, so that their customers can improve operating efficiency and machine uptime.” The addition of an integral vibration sensor in
the SICK sHub sensor hub greatly simplifies data analysis, making it much more straightforward to provide relevant information about motor condition, when compared with externally-
process with constant flow conditions. In addition, the data from the filter monitoring with active readjustment can be collected and used to predict the next filter replacement with external data analysis programmes.
Rehm Thermal Systems
www.rehm-group.com
hen the solder paste melts inside the process chamber, process gases are produced which cause
mounted sensors. Because the SICK sHub sends vibration data synchronised with the position and speed of the motor via HIPERFACE DSL, a clear insight can be gained from inside the control loop. The sHub vibration sensor can measure up to 50g with a 10kHz bandwidth. The SICK sHub and EDS/EDM35 smart
motor feedback system can also be integrated into drive safety systems, such as safely limited speed (SLS), thanks to the safe communication capability of HIPERFACE DSL.
SICK
www.sick.co.uk 35
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