Tool concentricity for rotating pull hooks and shear tools

Tool concentricity for rotating pull hooks and shear tools


Even using the best production methods for sensors and tools, tolerance buildups are unavoidable. This can create tool concentricity imperfections. Nonconcentric tools can be a problem during automatic testing or testing narrow applications. In wire pull, hook concentricity is essential to ensure testing only the correct wire and avoid simultaneously pulling multiple wires.

A Sigma bond tester comes with a software correction wizard to compensate for the tolerances and the concentricity during tool rotations for shear and pull tools. The software correction keeps the tool position constant when rotating, which is more consistent and accurate and can achieve eccentricities less than 5 µm.


Easy wizard to set up tool concentricity correction

There are 3 ways to set up the concentricity correction in the software sensor settings using an easy wizard and cameras. The wizard helps determine the tool dimensions and tool-position and measures the correction factor to compensate for the tolerances.


Manual alignment

Position the tool on a sharp corner or clear mark on the substrate to reach any rotation. Center the tool on the mark in 2 rotations on 0° and 90°. The software calculates the correction factors to set the concentricity correction.



With imprint

An ideal and fast solution for shear tools is to create 2 clear imprints in soft clay to measure the tool concentricity. Manually align the virtual tool under the camera to match the tool-position with the imprints. The software calculates the correction factor.



Vision assisted correction

This option requires no manual overlay positioning but uses machine vision software to detect the imprint positions. Use the wizard to set the pad size, angle, start position, and distances between imprints. The Sigma automatically determines the correction factor.

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Game-changing automation capabilities

Software concentricity correction is just one of many automation options a Sigma has to offer. Eliminate human error and save production costs with our automation capabilities for loading, testing, and analyzing.


Automatic loading

Automatic testing

Automatic analyzing

  • Evaluate the measurement results with an efficient grading run. A Sigma can also automatically determine failure modes with auto-grading.
  • An optical inspection does the grading automatically and calculates the area of bulk material remaining as a percentage of the whole.
  • Measurement of a distance, length, width, height, or area in a captured image. Optional with AOI for filtering, segmentation, shape detection.
  • Automatically store reports after measurements. We support data export to file, serial port, clipboard, and other protocols such as SECS/GEM.


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