Bestech Australia introduces the SGS 4701 Spindle Growth System, a new displacement measurement system developed specifically for high speed milling machine applications.
High machining speeds and the consequent heat generation require the linear thermal extension of precision machine tool spindles 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 with the measurement values fed into the CNC machine tool as
correction values, compensating for any positioning errors. The SGS 4701
operates on the eddy current measuring principle, with the non-contact
measurement method not only eliminating wear but also resisting disturbances
such as heat, dust and oil.
Consisting of a sensor, a sensor cable and a controller, factory calibrated for ferromagnetic and non-ferromagnetic measurement objects, the SGS 4701 is installed using two miniature sensors directly in the spindle, where the measurements take place.
In addition to measuring linear thermal extension, the temperature of
the sensor is also detected. The compact controller can be installed on the
spindle housing via a flange or directly in the spindle.
Key features of the SGS 4701 displacement measurement system include cost-effective design; miniature sensor design; miniature, compact controller; sensor technology integrated completely into the sensor; suitable for ferro- and non-ferromagnetic materials; and temperature measurement integrated in the sensor.