Analysis software VGraph

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VGraph is the software package for the recording and visualisation of data with extensive statistical data evaluation options. It synchronously records up to 16 measurement values – for example thickness, width and speed of the strip, rolling force or strip tension – on a production line, stores them and evaluates them statistically. With statistical functions such as histograms, Cp and CpK values and error lists, VGraph provides valuable decision aids for the evaluation and further use of the coil produced. The diagnostic instruments allow optimisation of the rolling process and the line engineering. The optional FFT analysis detects periodic fluctuations in the strip thickness. VGraph meets the needs of day-to-day strip production. One example: Random lengths of strip at the leading and trailing ends (drop-off) can be suppressed – even subsequently – in the statistical evaluations. The data are recorded in real-time – according to length or time – with a variable scanning rate from 1 ms upwards. The display of the measured values can be configured and scaled with a wide range of options. The documentation, such as the quality protocols of the coils produced, can also be variably adapted. The signals are recorded using a data collector belonging to the scope of supply. Its electronics with input and output modules is designed for installation in switch cabinets or desks in interference-proof 24 Volt top-hat (DIN) rail technology. It transmits the data via a network cable to the Windows recording computer which can be supplied by Vollmer or by the customer.