Higher speed torque motors support new machine tool applications

GE Fanuc Automation has introduced high speed models to its synchronous torque motor DiS Series with the same dimensions as the lower speed versions, expanding their applications to include turning applications in machining centres as well as extending their applications to gear and tool grinding machines. The new Di85/1000, DiS110/1000 and DiS260/1000 synchronous torque motors offer a maximum speed of 1000 rpm, while achieving the same 85/110/260 Nm maximum torques as the standard models in the DiS Series. With similar low torque ripples and maximum load-free angular accelerations of 100,000deg/s/s, these new high speed models now offer turning applications in machining centres as well as extending their applications to gear and tool grinding machines. A thermistor, in addition to the existing thermostat, provides temperature feedback of the stator. The rest of the Dis Series includes eleven 200 V and eleven 400 V models, offering maximum torques between 85 Nm and 3000 Nm at speeds between 75 rpm and 400 rpm: these are ideal for indexing of rotary tables and additional axes on 5-axis machines. The size of the sensor unit of the compatible, new GE Fanuc Absolute Alpha iCZ Sensor has been reduced by 50 per cent in the axial direction, compared to previous versions: the detector has been reduced by 70 per cent in volume. Both size reductions enable more compact installations. Improvements to the sensor gear and detector circuits have enhanced its accuracy to ±2 seconds (for the 1024 model). The Alpha iCZ connects directly to a GE Fanuc Servo Amplifier via the FANUC serial interface.