0030//Statistical Confidence Interval Mean and Variance of Inspection
Confidence Interval is a statistical jargon often use by "industrial statistician" to present the confidence level of their data...
0028// Pin Gauge Sizing for Thru Hole
Pin gauge is one of the most common gaging method use in metrology lab. It can help us verify the hole size easily with minimal cycle...
0025// Touch trigger probing strategy for flatness measurement -- BS 7172:1989
The current technology provides us plenty of choices to perform CMM measurement (such as scanning). However, in some circumstances,...
0021// F-test & t-test for flatness control
F-test and t-test are common hypothesis testing use in manufacturing to compare two set of samples' variance and mean. Below is one of...
0020// Flatness with Straightness Refinement
For flat surface with demanding " flatness" in certain direction, designer can use straightness as a refinement to tighten the form...
0019// General Tolerance for Straightness and Flatness -- ISO-2768-2
Do you familiar with table shown below? You can find this table in ISO-2768-2 table 1. This table is general tolerance table for...
0018// Calculate Flatness by Least Square Method
This week, we will discuss how to calculate flatness if points' coordinates on surface are given to you. First assume that we have a...
0016// Surface Flatness Measurement
Flatness is one of the important form control commonly use in different industries. Flatness control can use on sealing surface for...
0015// Parallelism Measurement
According Y14.5-2009, 6.3.2 Parallelism, Parallelism is the condition of a surface or feature’s center plane, equidistant at all points...
0013// Drafting practice for knurling
Knurling is a manufacturing process to roll or cut pattern of straight, angled or crossed lines on the material. However, sometime when...
