Jig Inspection with BuildIT’s GD&T Module


In this workflow, the laser tracker measures the part and BuildIT performs an automatic evaluation of inspection performance according to the GD&T standards as defined by ASME.

Maximum Material Boundary (MMB) Concept and its Advantages in GD&T Analysis

GD&T MMB Underconstrained and Gages Figure 4

The goal of this blog post is to present the maximum material boundary (MMB) concept in GD&T applications. The maximum material boundary concept is simply the use of a maximum material condition on a datum feature, as shown in Figure 1 (the annotation B(M)). Its major use is to allow easier assembly conditions on a part. Read More

GD&T in Aerospace Assembly: Use of Multiple Datum Targets for N-2-1 Location of Fuselage

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Datum Based Alignment of Fuselage

This post will present a possible case in the aerospace industry for locating a fuselage part with 9-2-1 location, using datum target areas. For more detailed information on datum targets, you may refer to the ASME standard, section 4.24 [1].

N-2-1 Location with Datum Target Areas

In a previous post, we talked about using 3-2-1 precision location to create an accurate and repeatable datum reference frame for the part, while avoiding overconstraint. However, for most sheet metal manufacturing processes, the main dimensional problem is the sheet metal deformation normal to the surface [2]. This deformation cannot be neglected, even under the self-weight of the workpiece. Analysis shows that the average deflection of a sheet steel plate 400 mm x 400 mm x 1 mm under its self-weight can be between 1-3 mm with a 3-2-1 location layout. Therefore, an adequate fixturing system for sheet metal usually requires N>3 locators on the primary datum to properly restrain workpiece deformation. Read More

GD&T in Automotive Assembly: Surface Profile Tolerances

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Car Door Surface Profile Tolerances

In a previous post, we presented an application of datum targets for 3-2-1 location of a car door. In this post, we will follow up with the same part to verify the surface profile tolerances along the side surfaces of the door, for optimal assembly conditions.

Surface Profile Tolerances

A surface profile tolerance zone is a three-dimensional volume establishing permissible boundaries of feature(s) of a part. A surface profile tolerance can be used to define a tolerance zone to control combinations of size, form, orientation and location of a feature relative to true profile.  For additional information about profile tolerances, please refer to the section 8 of the ASME Y14.5-2009 standard [1]. In Figure 1, we can observe the car door part located through datum targets with surface profile tolerances. In the next sections, we shall analyze these tolerances further to better understand their functions. Read More

GD&T in Precision Engineering: Use of Diamond Pins in Precision Location Applications

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Diamond Pin Assembly GD&T

In a previous post, we elaborated on the principles of precision location and presented one of the techniques for achieving it: The use of slots. However, with slots, we can still have the problem of high manufacturing cost if the part has substantial thickness.  This is because manufacturing a slot is simply more complex than drilling a hole, in relatively thick parts. One technique to have the best of both worlds is to use diamond pins. Read More

GD&T in Automotive Assembly: Use of Datum Targets for Precision Location of Large Surfaces

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Automotive Datum Targets

In manufacturing and assembly, parts must be accurately and repeatably located in a well-defined reference frame to ensure consistent quality. For many automotive parts, because of the large and irregular surfaces involved, the entire surface of the feature cannot be used as a datum. In these cases, we use datum targets to establish a datum reference frame. This post will present a possible case in the automotive industry for locating a car door with the 3-2-1 location method, using datum target areas. For more detailed information on datum targets, you may refer to the ASME standard, section 4.24 [1]. Read More

GD&T in Precision Engineering : Use of Slots in Precision Location Applications

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GD&T Pin and Slot DRF

Precision location can be very important in various engineering applications, such as machining and assembly. In machining, the tool follows a very precise path and a workpiece must be located precisely and stably at a precise position. In assembly, the positions of assembled parts must be assembled easily and overconstraint of the parts must be avoided. One of the common techniques for accomplishing these targets is the use of slots as part features. Read More

Jig, Tool Building and Assembly using BuildIT


Metrology assisted assembly, as well as jig and tool building, are used extensively in the aerospace and automotive industries. BuildIT can help streamline these workflows by offering all of the necessary tools:
– real-time inspection capabilities,
– network bundling for large part inspection
– and flexible reporting tools. Read More

Using Unicode Characters to Augment Your Annotations

BuildIT Unicode Characters

Why would you use Unicode characters in BuildIT?

In BuildIT 2015 we added the possibility to use Unicode characters throughout the software. In addition to multi-language compatibility, these characters contain various images that can be useful for identification and representation purposes. A unique use of this feature is the placement of arrows in the annotations and measure control to label the deviations. Read More

BuildIT and 8tree to co-exhibit at Control Show 2014


(Montreal, ) BuildIT and 8tree are pleased to announce that they will be partnering to co-exhibit at the 28th Control Fair this May in Stuttgart, Germany. BuildIT is a software development company with over a decade of experience in providing powerful 3D metrology solutions for advanced manufacturing. 8tree is a new and innovative company that brings groundbreaking 3D surface inspection technology with a disruptive pricing strategy to the industry. 8tree and BuildIT provide extremely powerful, yet easy to use solutions coupled with superior customer support. As independently owned and agile companies, both are fast and responsive to market needs, allowing them to focus on elegant solutions to market problems in order to create an effective and pleasing customer experience. Both companies prioritize helping their customers to reduce manpower by empowering operators and shop floor personnel with the ability to perform their inspections quickly and autonomously. This complementary alignment has led both companies to team up for Control 2014, the world’s leading trade fair for quality control. Read More

BuildIT Releases New Version of 3D Metrology Software – BuildIT 2014

BuildIT releases latest version of its inspection and assembly solutions for advanced manufacturing, metrology assisted assembly and quality control

BuildIT Software & Solutions Ltd. is pleased to announce the release of BuildIT 2014, with improved fitting methods, support for additional formats and all new commands. The latest version of their 3D metrology software enables quick and easy dimensional inspection of manufactured parts and assemblies for tool building, assembly, alignment, process automation and quality control. Read More