Datum Reference Frame (DRF) in Geometric Dimensioning and Tolerancing (GD&T): An explanation with figures

GD&T DRF Part with Constraints

A datum reference frame is a coordinate system against which the geometric dimensions and tolerances of a part are defined. The main function of the datum reference frame is to specify a foundation for the inspection of the part. It is the common coordinate system of all tolerance zones. Without this common coordinate system, product definition is unclear, rendering the inspection results unreliable. Read More

Comparison of tolerances used for coaxiality control: Position, Concentricity, Circular Runout and Total Runout


Coaxiality conditions can be vital for shafts supporting heavy and varying loads, such as car and truck axles, electric motors, generators and pumps. There are four different types of tolerances for defining coaxiality controls: Position, concentricity, circular runout and total runout. This post proposes brief and practical definitions regarding which type of tolerance to choose for certain applications as well as the advantages and disadvantages to each. For more information, refer to the ASME standard [1] and other related reference articles [2]. Read More

Surface Inspection Annotation

BuildIT surface inspection annotation of points

BuildIT allows users to perform quick and easy inspections. It also enables users to perform analysis and produce reports that are both detailed and simple to generate.

The Surface Inspection Annotation command is a good example of BuildIT’s ease of use. Without performing a complete analysis on a part or an entity you are inspecting, you can evaluate a single measurement at a time. This command also allows you to manually annotate measurements in order to convey information in a way that is clear and simple. Read More

BuildIT 2016 Overview Video


Full overview of new features and improvements in BuildIT 2016, including: improvements to the UI, redesigned customized reporting, enhancements to process automation capabilities and new GD&T functionality including MMC on Datums.

BuildIT Releases Latest Version of 3D Metrology Software – BuildIT 2016

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BuildIT 2016 yacht

BuildIT Software & Solutions Ltd. is pleased to announce the release of BuildIT 2016, a major update to the 3D metrology software.  BuildIT 2016 adds many new features and improvements including updates to the UI, redesigned customized reporting, enhancements to process automation capabilities and new GD&T functionality featuring the optimization of evaluations using MMC on datums in DRF. Read More

BuildIT 2016 – Redesigned Reporting

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Overview of the redesigned reporting capabilities in BuildIT 2016.

BuildIT 2016 has redesigned the reporting scheme to improve the ability to generate reports in a quick, easy and customizable way.

BuildIT 2016 – GD&T Capabilities

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Overview of additional GD&T capabilities in BuildIT 2016.

Building Photogrammetry: Comparing Camera Results of iPad VS DSLR


If 800 people are working on the iPhone camera, would this mean that smartphone / tablet cameras will soon match the performance of DSLRs?

The short answer is “No”, as long as the camera sensor size is not increased.  A larger camera sensor allows the capture of more light and reduces noise levels. Their applicability to smartphones / tablets will always be limited, however, since a larger sensor size would also require a larger lens, which would not be very practical for a smart device. Read More

BuildIT 2016 – Automation

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Overview of enhancements to Automated Processes in BuildIT 2016.

BuildIT 2016 – UI Improvements

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Overview of improvements to the UI in BuildIT 2016.

OASIS Alignment Enhances their Inspection Services using BuildIT Software

Hydroformer-inspection in BuildIT

OASIS Alignment provides 3D metrology services in the alignment and calibration of industrial machinery.  For this, they use a combination of laser tracker technology, and BuildIT software, to perform their precision measurements and adjustments.  

As a service company, Oasis performs a variety of jobs, each of which require different setups and workflows.  BuildIT’s adaptable workflow is a huge help in this case, with the ability to generate processes on the fly. Read More