Hole Finder
About Us Contact Us Documents Applications Products


Got problems verifying that a hole exists...
....does it have the correct area... or has a pulled slug?

This application will show you how you can use analog proximity sensors combined with the signatureACE®'s high resolution and speed to verify hole quality.

The Signature Technologies SA-2000 “SAM module, and Signature Technologies SamView™ Software package can be used to non-contact evaluation of specific features on manufactured parts.

The illustrated method can perform the same type of test every stroke of the machine so the work pieces can be verified to have specific features present.

The system works by applying the work piece precisely positioned relative to the analog proximity displacement sensor each stroke of the machine.  Since the displacement is always the same, the proximity then looks for AMOUNT of material in its sensing field, and if MORE material is present, then the indication is that a hole is missing, or its slug hasn’t cleared.


Magnetic sensors have also a reaction to material variations, and magnetic history, so this method will not produce a precision measurement of the hole(s), but will easily indicate presence, absence, or gross deformity issues.  

The measurement cannot be calibrated, and must be used as a comparative measurement. Check other application bulletins for calibrated measurements.

 Multiple sensors can be used in cases where there are several different features to measure, or where multiple measurements are required to insure proper formation of a single feature.  The SAM™ module can handle inputs in groups of 8 up to 56 total points. 

Signature Technologies can supply a wide variety of  solutions to various manufacturing process problems dealing with measurement, verification of properties, tool condition, and machine health.  We can also “close the loop” by performing process adjustments in response to specific variations in force, location, or shape of the work piece, as well as more simple controls which can track and reject specific parts which don’t meet specific quality criteria.

For a .pdf file copy of this bulletin please click here.





Need to contact us?

© 1998-2013 All Rights Reserved
SIGNATURE TECHNOLOGIES® · 1225 Yacht Club Road, BLDG N/W · Oak Point, TX  75068-3034
Phone: 972-294-4808 · eFax: 815-301-9890

Contact Webmaster at the WebBrewery