The eddyNCDT SGS4701 is a spindle growth measuring system designed for high-speed milling machines to compensate for thermal and centrifugal expansion of spindles by non-contact, wear-free eddy current measurement. It features a miniature M12 sensor with integrated temperature measurement, factory-calibrated for ferromagnetic and non-ferromagnetic targets, and a compact controller mountable on or within the spindle. The system has a measuring range of 250 to 500 µm, a resolution of at least 0.5 µm, and a measuring rate of 64 kSa/s with a frequency response of 2 kHz. The sensor cable must not be shortened, and the 8-pin M12 connector provides signal, power, and temperature output channels.
The SGS4701 displacement measuring system is developed specifically for high speed milling machine applications. Due to high machining speeds and the heat generated, the linear thermal expansion of the spindle in precision machine tools needs to be compensated for in order to keep the tool in a defined position at all times. The SGS sensor measures the thermal and centrifugal force expansion of the spindle. These measurement values are fed into the CNC machine tool as correctional values, compensating for any positioning errors. The SGS4701 uses the eddy current measuring principle, providing a non-contact, wear-free measurement, and the measurement procedure is resistant to disturbances such as heat, dust and oil.
| Micro-Epsilon Group | |
|---|---|
| Product Category | Linear Position Sensors |
| Product Number | eddyNCDT SGS4701 |
| Product Name | Spindle Growth System |
| Sensor Technology | Eddy Current Linear Encoder |
| Body Shape | Rectangular |
| Measurement Range | 0.0098 to 0.0197 inch (0.2500 to 0.5000 mm) |
| Linearity | 0.5000 ±% Full Scale |
