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Order Catalog


The displacement measurement system SGS 4701 (Spindle Growth System) has been developed for high speed milling machine applications. Due to high machining speeds and the heat generated, the linear thermal extension of the precision machine tool spindle 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 extension of the spindle. The measurement takes places typically on the labyrinth-ring. As well as measuring linear thermal extension, the temperature of the sensor is also detected and output.These measurement values are fed into the CNC machine tool as correction values, compensating for any positioning errors.


Sensor system SGS4701
Measuring range 500µm (option 250µm 2))
Offset 100µm (option 50µm 2))
Linearity ±2µm
Resolution 1) 0.5µm
Bandwidth 2000Hz
Target ferromagnetic / non-ferromagnetic
Minimum target diameter 6mm (option 3.5mm 2))
Operating temperature  sensor 0 ... +90°C
Operating temperature  controller 10 ... +70°C
Temperature stability  sensor ±150ppm FSO/°C (MMR)
Temperature stability   controller ±500ppm FSO/°C (MMR)
Temperature compensation range  sensor +10 ... +80°C
Temperature compensation range    controller +10 ... +70°C
Supply voltage 12 ... 32VDC
Analog out  displacement 0.5 - 9.5V ? 100 - 600µm (option 50 - 300µm 2))
Analog out  temperature 0.5 - 9.5V (? 0 ... +90°C)
Protection class   sensor / controller IP67 3)
Dimensions   EMU04(102) 12x10x4.5mm 4)
Dimensions   EMU04(121) 10x4x4mm 4)
Sensor cable 3)   diameter Ø 1.13mm
Sensor cable 3)   length 1000mm (400 - 1500mm on request)
Sensor cable 3)   min. bending radius 12mm
Sensor cable 3)   jacket FEP