Targeting Through Holes in Printed Wiring Boards (PWB) – Use of Reference Pins

Targeting Through Holes in Printed Wiring Boards (PWB) – Use of Reference Pins

When using the PC-MET and PWB-MET targeted grinding fixtures from Buehler, it’s necessary to set the total grinding distance from a reference pin on which the sample is mounted to the feature of interest.  In the standard equipment, this distance is set to 0.150” as shown in the diagram. The perfect target is reached by …

Petrographic Preparation – how and why to frost your slide

Petrography Frosted Slide

In petrography, and in some other analyses, it is necessary to examine the structure of materials using light transmitted through the specimen.  For this to work effectively on rocks and minerals, the sample needs to be extremely thin – typically 5-30 microns.  Many applications need the thickness of the specimen to be extremely consistent, in …

DiaMet Hardness Software – Weld Testing Using Vickers Hardness Scale

Weld Image

Welded joints are nowadays indispensable in the automotive and aviation industry. Welds usually combine metallic components to form a structure that is then assembled in production and assembly with other subassemblies. The welds must be able to withstand extreme loads as they are the weak points of the construction. Weld seam inspection is thus a …