M2M communication for continuous monitoring and support

Connectivity for Improved Utilization and Quality

With the accelerated pace of Industry 4.0 and smart PCB manufacturing implementation in electronics manufacturing, process engineers and production managers need more tools and solutions to analyze defects that determine their root causes and prevent them from recurring. Machine-to-machine communication is one of the tools used in smart factories that can deliver such a solution. ViTrox’s V-One and KIC’s Vantage are examples of technologies that provide root cause analysis and potential prevention.

by Gary Leong, Director of Business Development, Automated Board Inspection (ABI) at ViTrox and Bjorn Dahle, President, KIC

Figure 1 Network linkage of SMT equipment with Vantage and V-One


With V-One, the company links all the key inspection systems, including the reflow oven, an important area previously considered a ‘black box’. With the integration of KIC’s RPI reflow inspection solution and the Vantage software, V-One can now access and connect to valuable reflow production profile data in real-time. By connecting to other systems and taking a proactive role in the manufacturing processes, the process engineer can create an intelligent network along the entire value chain that can communicate and control with less human intervention. ViTrox’s focus on the inspection machine, together with real-time reflow production profile inspection, has evolved from defect identification to defect prevention through real-time machine data and process monitoring and analysis.


Figure 2 V-One analytics showcasing the various graphs and trends of peak temperature and PWI


Vantage + V-One = Machine-to-Machine solutions
The ecosystem establishes inspection and reflow integration cases by looking at thermal data, board data, statistics, trends and defects inspected on AOI systems and RPI systems. In an AOI system with an inline review and repair station (VVTS), operators review and judge the calls as either potential failure or true failure. However, there will be instances when a technician may have difficulty making a judgement from the pictures and data presented due to a borderline status. This requires more data to make a good judgement, and the result of the all will add to the process parameters in the future. So, what can the technician do?
The real-time reflow process monitor allows users to review reflow inspection data in the form of temperature profile statistics and to determine the quality of the reflow profile directly from the smart AOI station. Areas of review encompass the solder characteristics of a solder joint and its profile quality (PWI – Process Window Index) in terms of adhering to the established soldering spec limits. Continuous monitoring and review of the reflow inspection trends also supports the decision-making process.


Figure 3 Vantage factory oven status


Factory floor example
Let’s look at a possible scenario in a manufacturing environment. IN a high-volume, low-mix environment (HVLM) scenario, production output is the most critical factor in the production line where pressure is constantly being built up to product more and more, In some instances, boards are jammed in the production line and then pushed into the reflow oven without adhering to the loading factors or taking into account the impact that the number of boards in the oven may have on the production profile.
The reflow process data captured in the smart AOI software reveal trends where the board profile PWI rapidly moves towards, and eventually beyond, the upper process limit. This is due to a drop in peak temperature. A process owner who understands the behavior of such temperate trends will quickly identify that the oven loading is too great. However, the process expert may not always be on the production floor. IN this scenario, V-One and Vantage act as a background monitoring alarm to review such trends and set thresholds to alert the process expert whenever these situations begin occurring.
The appropriate person can be alerted via an eTicket on his/her mobile device that, in turn, enables visibility to the production profile data. The data automatically is stored for traceability purposes.


Figure 4 V-One eTicket: an engineer can create and assign tasks to line technicians who receive the notification on their mobile through the mobile app


With the move toward connected and smart factories, today’s electronics manufacturers require solutions that will help them maintain high-quality, low-production costs. The ideal smart factory with i4.0 technologies requires equipment and software that can work automatically and autonomously with machine-to-human collaboration for the best results based on sound decision making. The above-referenced smart AOI and reflow process inspection ecosystem meet the demand for these requirements and provide an i4.0 solution of actionable data and insight when and where needed. This technology strives to make defects a thing of the past.


Reprinted with permission from the November 2018 issue of EPP Europe

KIC Thermal