SIEMENS Community - The Number One Source for Siemens PLM Software Coverage, including NX, The Solid Edge Velocity Series, Teamcenter and Tecnomatix Finite Element Procedures for Solids and Structures Inner workings of Chinese Digital Scales How do the Digital Scales work? I can't offer a complete explanation, but some insights that go quite into depth. Sizes of the physical placement of capacitors that form an electronic vernier and how the signals look like can be found here. This information is really for the nerds and not of any use for those who want to just build their next steam model. Under the Sticker: click to enlarge Note: Chances are very high, that the numbers given in the above picture are a bit off. That's how it looks if you peel off the sticker (with the ruler's numbers printed on). I have lent me a HP 54645D. Just for your curiosity, this is a picture of the measuring setup. Here is a picture showing the signal (analog channel on top is the receiver pad). click to enlarge (1.2 MB!) Here is a detail of the above screen dump (the part marked "see#2") (0.8 MB!) C3 is connected to the leftmost sender pad, C2 to the second, C1 -> 3rd, C0 -> 4th, C7-> 5th, C6 -> 6th, C5 -> 7th, C4 -> 8th. I name the parts:
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ArtSoft USA - Home of Mach3 and LazyCam Wire EDM Tooling - Praxis Precision Work Holding INDUSTRIAL NEWS /// WORLDWIDE INDUSTRY NEWS /// METAL & PLASTIC INDUSTRY 1. Roughness : Terminology The quality of machined surface is characterized by the accuracy of its manufacture with respect to the dimensions specified by the designer. Every machining operation leaves characteristic evidence on the machined surface. 1. Roughness consists of surface irregularities which result from the various machining process. 2. It is the height of the irregularities with respect to a reference line. 3. The roughness width is the distance parallel to the nominal surface between successive peaks or ridges which constitute the predominate pattern of the roughness. 4. Roughness width cut off is the greatest spacing of respective surface irregularities to be included in the measurement of the average roughness height. 5. Lay represents the direction of predominant surface pattern produced and it reflects the machining operation used to produce it. 6. This refers to the irregularities which are outside the roughness width cut off values. 7. 8. 9. 1. 2. Ideal Roughness Natural Roughness