Technical Description: Heidenhain 1089178-01 (LC 415)
The Heidenhain 1089178-01 is a high-precision absolute linear encoder from the LC 400 series. Specifically an LC 415 model, it is designed for absolute position measurement on CNC machine axes. Unlike incremental scales, the LC 415 provides the absolute position value immediately upon power-up through the EnDat 2.2 serial interface, eliminating the need for reference runs and significantly increasing machine efficiency and safety.
High-Accuracy Optical Scanning
The LC 415 series utilizes a glass scale with DIADUR graduation, which offers extreme resistance to mechanical wear and high thermal stability. The 1089178-01 features a measuring length (ML) designed for compact axes. Its slim profile makes it suitable for tight installation spaces in small-to-medium milling machines and lathes. The EnDat 2.2 interface ensures high-speed data transfer and allows the CNC control to access comprehensive diagnostic information from the scale in real-time.
Key Characteristics
- Part Number: 1089178-01.
- Model: LC 415.
- Interface: EnDat 2.2 (Purely serial).
- Accuracy Grade: ±5 µm.
- Resolution: Down to 10 nm (depending on control).
- Measuring Length (ML): 270 mm (Standard for this variant).
- Protection: IP53 (Standard) / IP64 with DA 400 air purge.
CNC Integration and Performance
Integrating the 1089178-01 into a machine tool significantly improves surface finish quality and dimensional accuracy. The absolute measurement principle ensures that even in the event of a power interruption, the machine «remembers» its exact position. The scale is housed in a robust aluminum extrusion with high-quality sealing lips to protect the optics from coolant, oil, and metal chips typical of metalworking environments.
| Parameter | Value |
| Traverse Speed | 120 m/min |
| Vibration Resistance | 100 m/s² (55 Hz to 2000 Hz) |
| Signal Period | 20 µm |
Maintenance Insights
To maintain the precision of the LC 415, it is recommended to use the Heidenhain DA 400 compressed air unit. This creates a positive pressure inside the scale housing, effectively keeping contaminants out. Periodic inspection of the sealing lips for wear is vital for long-term operational safety.
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