WZL x GCX x IOTA — Status Report 02

The full article was originally published by Daniel Trauth on Medium. Read the full article here.

Retrospective

This PoC is about an industrial fineblanking machine type XFT 2500 speed from Feintool AG. It ist used for the mass production of safety-critical components, such as brake carrier plates or belt straps. In the first article we achieved to extract selected data from the machine, converted it from analog to digital, stored it in a .json-file and uploaded it into the official testnet. However, we did not optimize any of those steps, we just wanted to go the complete mile. The following video shows you the machine and the process, just in case you missed it in the Status Report 01.

Focus of Status Report 02

This article shows how we prepared the machine data, how we decided to attach the data package to the tangle and which technology stack we chose. Check Status Report 01 to see the PoC’s architecture.

Data package specification

For this PoC we have only selected a set of data which we can quickly measure. This has enabled us to work through all task packages relatively efficiently. For a productive scenario, it is certainly necessary to question which data is needed and which data is to be used. With the completion of this PoC, however, this is only a development decision and no longer a technological hurdle.

Data set

Nevertheless, we have tried to choose practical data. Our data package thus contains measured process data as well as metadata. The metadata includes a unique ID (type: integer) which is determined by digital image processing from the component surface and a generated hash (work in progress, not yet stable) and the material name (type: string) according to the international standard of the material used. Other metadata such as the name of the product, the name of the machine operator, the name of the manufacturer or the customer, etc. are conceivable at this point. In addition, real machine data has been measured. This includes the maximum punch force (type: float, unit: kN) of the ram, which is the reaction force resulting from the cutting contour and the material, and the punch stroke (type: float, unit: mm). Since the material properties and sheet thickness are not constant from part to part due to material fluctuations, the punch force and punch stroke differ each time. The die roll (type: float, unit: mm) is currently estimated on the basis of existing analytical models, as we still have to work on the measurement technology. The timestamp (type: unsigned integer) is calculated using the UNIX timestamp and describes the time of production, not the time of upload.

Read the full Article

The full article was originally published by Daniel Trauth on Medium, where people are continuing the conversation by highlighting and responding to this story.

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