High precision machining

Figure 16.9—Representation of a quadrupole. Notice the pairing of oppositely charged electrodes. This experimental design requires high-precision machining of the hyperbolic electrodes. To the right a series of equipotential hyperbolic lines in the central part of the quadrupole is shown.

Zhao, D.S., Roy, B., McCormick, M.T., Kuhr, W.G., Brazill, S.A., Rapid fabrication of a poly(dimethylsiloxane) microfluidic capillary gel electrophoresis system utilizing high precision machining. Labchip 2003, 3, 93-99. 

The most advanced machine vision systems typically involve acquisition and interpretation of three-dimensional information. These systems often require more sophisticated illumination and processing techniques than one- and two-dimensional systems, but their results can be riveting. These scanners can characterize an object s shape three-dimensionally to tolerances of far less than a millimeter. This allows them to do things such as identify three-dimensional object orientation (important for assembly applications), check for subtle surface deformations in high precision machined parts, and generate detailed surface maps used by computer-controlled machining systems to create clones of the scanned object. 

For standard components, an accuracy of 100 /xm is sufficient. Complex components must be placed with an accuracy better than 50 /xm. For special applications, high-precision machines are used with an accuracy of 10 /xm related to a normal distribution and at a standard deviation of 4o-. This means, for example, that only 60 of 1 million components will be outside a range of 10 /rm. Due to the necessity for using a small amount of solder paste with fine-pitch components (down to 200 fxm pitch), minimal vertical bending of the component leads (about 70 /am) causes faulty solder points and requires cost-intensive manual repairs. 

Fine finishing of holes or reaming process belongs to the high-precision machining... 

High precision machining Precision machining Ultraprecision finishing... 

Fabrication methods such as DRIB (deep reactive ion etching) and laser ablation have been widely used owing to the exceptional surface quality and reproducibility that they provide. However, high-precision machining and serial... 

High-Precision Machining by Measuring and Compensating the Error Motion of Spindle s Axis of Rotation in Radial Direction... 

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