Digital Metrology provides measurement training as well as consulting services and measurement software. The metrology tutorials below are all intended to help you learn aspects of measurement such as 2D roughness and waviness, 3D surface texture, roundness, etc.

All of the documents can be read online or downloaded as “PDF” files. You can obtain a free copy of Adobe’s PDF Reader here.

Specification and Measurement of Plateau Honed Surfaces

The surface texture inside a cylinder bore is critical to engine performance. We've put together a guide to the types of surfaces and the best parameters to control them. We also discuss other critical aspects of cylinder bore texture , including crosshatch angle, torn and folded metal, and the pits and porosity caused by pull-out.

Areal Surface Texture Analysis

Areal Surface Texture Analysis for Both the Lab and the Engineer's Desk
March 7, 2019

This tutorial discusses a step-by-step and visual approach to surface texture analysis. The process, which is the basis of the OmniSurf3D software, allows designers, managers, process engineers and lab staff to explore, understand and communicate surface texture. By providing a common language for surface texture analysis, OmniSurf3D helps everyone involved to improve component performance.

What Do You Mean By “Roundness?”

What frequencies do we include in a roundness measurement?
June 26, 2014

This tutorial discusses aspects of specifying and measuring roundness - including the concepts of filtering for roundness and the choice of reference circles.

3 Steps to Understanding Surface Texture

I have a surface finish specification. Where do I begin?
May 26, 2014

Common questions in surface measurement and analysis are: “I have a surface finish specification.  Where do even I begin?” or “I’m new to the field of surface measurement.  What do I need to know?”  This tutorial is will help you get started.