Integral, high torque density servo drive with CANOPEN interface and absolute multiturn positioning 　　Multi axis machines 　　Direct drive without gearbox 　　Intrinsic multiple electric gear 　　Generalized electronic camshaft 　　No zeroing cycles 　　350 Vdc power bus 　　3-6 Nm torque, 3000 rpm max 　　Built in 4096 turn, 18 bit absolute encoder, 1 arcmin accuracy 　　Double insulation 　　Built in RFI filter, Class B 　　IP 65 protection 　　 TW drives consist of a new type of permanent magnet, rare earth PM motor, in which an exceptional torque density is achieved by means of a new winding configuration and novel non laminated soft magnetic materials. The motors are mass produced on an innovative stratified winding system, unlike all conventional PM motors. This novel arrangement is ideally suited to the realization of very short torque or pancake motors, such as the Ultract T line by Phase Motion Control. In the TW drive, however, such a “short motor” geometry is used to couple the motor with its own multiturn, absolute encoder and DSP based sinusoidal drive in a single, IP 65 protected package in a “cube” geometry. 　　 The combination motor + drive is shielded and insulated from the motor frame so that the RFI noise typical of PWM drives, which is coupled to the driven system by the capacity of interconnection cables and motor windings, is stemmed at its source point. The motors are thus noise free. The interconnection with the machine master is provided exclusively by an optically isolated CANOPEN interface. A separate hardwire enable input is also available for safety. The 4 wire digital interface grants reliability and ease of installation expecially in multi axis systems. 　　 TW drives are fed from a 200-350 V DC bus. TW drives are controlled in space, speed or torque. A mission profile or cam movement can be downloaded into the TW drive in off line mode. The motor can be programmed or monitored via the CAN-Cockpit Windows software provided with the drive. The TW motors embody a flash memory to store permanent data irrespective of power supply availability.