Dynamic reference diffuse sensors
DRT 25C - The one for everything.
Reliable detection of confectionery and baked goods.
No readjustment when changing objects.
The DRT 25C dynamic reference diffuse sensor – an innovative new product from Leuze – is specially designed for the detection of confectionery and baked goods. Thanks to intelligent CAT technology it reliably recognizes flat and spherical products, transparent to high-gloss films as well as irregular shapes and contours.
Highlights
The better diffuse sensor
No matter what shape the confectionery and baked goods and their packaging have: With its three light beams, the DRT 25C reliably detects the front edges of the objects and ensures that the process goes smoothly without any machine downtime. Thanks to the wide scan, even products with holes, such as cookie curls, are safely detected as a continuous object. For this, not all three light spots need to be on the object.
From transparent to high-gloss
Packagings with different colors and transparency are safely detected as a ‘deviation’ from the conveyor belt surface due to the reference technology. This means that even machines that process a wide range of films can be equipped with a single sensor type.
No setup time when changing products
When performing the initial setup, the conveyor belt surface is taught in as a point of reference with the teach button. After a product changeover, it is not necessary to adjust this setting, as the point of reference remains the same. In addition, the mounting position and the alignment of the sensor itself can be continuously used for the widest variety of objects. This means that no setup effort is required for the sensor when changing products.
One-of-a-kind CAT technology
The DRT 25C works with the conveyor belt surface as a dynamic reference for the detection of objects. With this method, the surface characteristics of the conveyor belt are taught in via the teach button. The sensor will then detect all objects that do not correspond to the conveyor belt surface. The DRT 25C thereby functions independent of object, making it more stable than classic diffuse reflection sensors. Even contamination on the conveyor belt can be compensated with the Contrast Adaptive Teach technology.
Applications
Detection of products on conveyor belts of primary packaging machines
Requirement:
To control the buffer section and the weld bar, the front edges of the products on the conveyor belt must be reliably detected. The sensor must also reliably detect products with challenging dimensions from very flat to very tall, in order to prevent machine stoppages due to incorrect detection. The sensor must be easy to set up for all products.
Solution:
The DRT 25C reliably detects anything, from small and flat to tall and spherical products, even if the shapes and contours are irregular. This means that machines can be fitted with a single sensor regardless of the application. The single button teach function also makes the DRT 25C easy to set up.
Detection of products on conveyor belts of secondary packaging machines
Requirement:
For trouble-free control of the buffer section, packaging made of various materials and with a wide variety of surfaces must be reliably detected from the front edge. Changing products or packaging films should not require any additional setup and adjustment work on the sensor.
Solution:
The unique technology of the DRT 25C uses the conveyor belt surface as the point of reference. The detection is independent of the surface characteristics of the materials used, such as the color, gloss, and transparency. This means no setup work on the sensor is required when changing products.
Article list
- Operating principle: Reference teach on background
- Operating range, max.: 0.05 ... 0.2 m
- Switching output: Transistor, PNP
- Operating principle: Reference teach on background
- Operating range, max.: 0.05 ... 0.2 m
- Switching output: Transistor, NPN