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Application example

Full count of balls in a ball bearing housing

Task definition

When manufacturing ball bearings, it is vital to know that the bearing has the full number of balls. The aim of the application is to inspect a ball bearing after assembly to ensure it is complete. 

This is necessary as it is possible for balls to be forgotten, to fall to the side of the bearing or to roll out when inserted. If balls are missing, the bearing is useless. 

However, ball bearings can have a different appearance depending on the angle of rotation.  If a ball is missing and the other balls are evenly spaced, it is difficult to immediately spot whether the balls are complete or not.

Raw image

Raw image

Our solution

A VISOR® Object is used together with an angled ring light as a source of external illumination. This light is reflected from a flat angle directly into the sensor by the curved surface of the balls. 

A BLOB detector is used to find the balls. As the BLOB detector uses the size of the reflection to identify the row in which balls are sitting, balls shining through from the bottom row no longer cause errors. 

Recommended products for this application

VISOR® Object