Tolomatic IMA integrated-motor rod-style actuator

Tolomatic’s integrated-motor rod-style actuator (IMA) is now capable of delivering up to 14.6 kN of force when equipped with the roller-screw option. The actuator incorporates a hollow-core rotor and skewed motor windings into its servomotor design for a compact package with increased dynamic performance and service life compared to traditional rod-style actuators. The integrated motor design is suitable for applications such as pressing, clamping, valve control, spot welding and volumetric filling.

With the addition of the roller-screw option, the service life of the IMA increases by about ten times or more in high-force applications, and the estimated life of the roller screw is claimed to be over 25 million centimetres of travel at a mean force of 8.9 kN. The standard ball screw on the actuator offers better efficiency and economy, but the roller-screw option offers higher force, better accuracy and longer service life in high-force applications.

The hollow-core rotor design allows the nut of the screw to pass inside the rotor to provide a more compact package, decreasing overall actuator length by up to 45 cm, compared to standard actuators, due to the elimination of a separate motor, motor mount and gearbox. In addition, the skewed stator windings minimise the cogging of the motor to provide smoother, more efficient motion and improved force repeatability.

The actuator is available with a choice of motor voltages in any incremental stroke length from 15 to 45 cm.