Technical Description: Heidenhain 535046-N2 (LS 187)
The Heidenhain 535046-N2 is a high-accuracy incremental linear encoder belonging to the LS 100 series. Specifically an LS 187 model, this linear scale is designed for applications on machine tools and manual measurement equipment where high vibration resistance and tight tolerances are required. It provides a 1Vpp sinusoidal output signal, which allows for high interpolation factors in the CNC control, resulting in sub-micron positioning accuracy.
Mechanical Design and Protective Housing
The LS 187 series features a slender profile housing that protects the internal glass scale and scanning carriage from dust, chips, and splash water. The 535046-N2 utilizes an aluminum mounting spar (extrusion) that ensures the scale remains thermally stable and correctly aligned over its entire measuring length. The scanning unit moves along the scale on ball bearings, providing low friction and high repeatability.
Key Characteristics
- Part Number: 535046-N2.
- Model: LS 187.
- Signal Type: Incremental 1Vpp (Sinusoidal).
- Grating Period: 20 µm.
- Accuracy Grade: ±5 µm (Standard).
- Reference Marks: Distance-coded or single reference mark.
- Interface: Cable with connector (Length varies by variant).
- Protection: IP53 (Standard) or IP64 with compressed air.
Performance and CNC Integration
The 535046-N2 is the ideal solution for feedback on X, Y, or Z axes of milling machines and lathes. The 1Vpp signal is processed by the Heidenhain TNC control or other high-end CNC systems to provide real-time position data. Because of its incremental nature, the system requires a reference run upon power-up, which is quickly facilitated by the integrated reference marks on the scale.
| Feature | Detail |
| Measuring Length | Variable (Ref. N2 designation) |
| Max Traverse Speed | 120 m/min |
| Mounting Type | Scale with Mounting Spar |
Maintenance Insights
To ensure the longevity of the LS 187, it is essential to keep the sealing lips of the aluminum housing clean. In environments with high concentrations of coolant or metal dust, the use of a DA 400 compressed air kit is highly recommended to create a positive internal pressure, preventing contaminants from reaching the optical scanning glass.
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