Torque Motor Technology &
CMS’ Torque5 Working Unit
Torque drive technology is the application of direct-drive motion to the working unit’s rotary axes, involving the 4th and 5th axis controlled movement of the cutting spindle, i.e. its rotation and inclination. The CMS Torque5 working unit is featured on its Cronus K and Cronus series of CNC machining centers.
Torque motors are permanently excited, synchronous servomotors and can be most easily conceived of as just a rolled up linear motor.
- Very fast oscillatory movements
- High Dynamics
- High rigidity in static position
- High torque
- No backlash
- High positioning precision
Direct drive motors consist of an outer stator with electrical windings which create the magnetic field needed to transmit the required torque to rotate the inner rotor, which has permanent magnetos placed about its circumference.
Torque5 working units also include additional technology for:
- High-stiffness axial radial bearings
- Rotating absolute encoders
- Liquid cooling system for the direct drive motors
- Pneumatic brakes for increased stiffness when the axes are not interpolating
Torque5 head technical features:
|B & C Axes|
|Continuous S1 torque||480 Nm – liquid cooled (354 ft-lbs)|
|Maximum torque||1,200 Nm (885 ft-lbs)|
|Maximum speed||100 rpm, 36,000°/min.|
|Clamping moment||1,000 Nm (738 ft-lbs)|
|Bearings||axial-radial type with rollers|
|Tilting stiffness||21.4 KNm /mrad|