New high-resolution weigh modules from Mettler Toledo offer surprisingly fast and simple solutions for 100-percent in-process-control. They can be used to check completeness of parts, kits or modules as well as quality of surfaces where material is added or subtracted.
Traditional methods for in-process-control and end-of-line-control use electrical resistance, optical imaging, spectrometry, light beam and mechanical sizing. It wasn’t until recently that weighing technology was used in spot checking mode. This was mostly due to the design of traditional balances and scales, which didn´t fit seamlessly into machines and instruments. It also wasn’t obvious that dimensions, coatings, shapes or completeness could indirectly be checked while looking at weight deviations or differences.
High-resolution weigh modules from Mettler Toledo are very compact. They can be seamlessly integrated into various machines and instruments. In an automated process, a weigh module can detect violations of weight tolerance of 1 ppm in a split second. This high measurement speed enables 100 percent inspection without sacrificing high throughput. Although lighting and positioning of the part doesn't matter, this method is suitable for complex shapes, hidden structures, material inconsistency, as well as transparent or reflective materials.
Standards like TS16949 and ISO9001 require periodic testing of quality control devices. The test frequency has to be in accordance with the risks related to the respective control process. Weigh modules are tested with traceable weights to comply with the above mentioned standards. This procedure is easy and inexpensive. In addition, most weigh modules have a built-in calibration weight. This allows for automatic verification of function and precision, plus adjustment if necessary, at any time.
Mettler Toledo, www.mt.com/industrial