The DOT code was introduced by the US Department of Transportation (DOT) and is used throughout the world to identify tires in production. The number code is branded on the side wall of the tire and indicates factory location, tire size, type and week of production. To facilitate production, automated tire mounting on rims and feeding pre-assembled vehicle tires for automotive assembly (including logging and documentation) automatic detection is a must. But to meet this prerequisite within the required cycle time is a technical challenge.
The identityCONTROL TID 8303.I from Micro-Epsilon is a new system that in addition to capturing the DOT code is also able to read additional alphanumeric data on the side wall of a tire. TID 8303.I is based on the optical measuring principle of structured light projection, where several patterns are projected sequentially onto a target object and captured using a camera. This generates a 3D point cloud, which is then used to calculate the desired information. Unlike conventional systems, identityCONTROL TID 8303.I does not require any additional electro-mechanical components in order to index or turn the tire, which makes it a wear-free, service-friendly, and cost-effective solution. As accurate tire positioning is not required, the system is able to significantly reduce cycle times. It is very easy to teach identityCONTROL TID 8303.I new tire types, which are managed through a database.