The V-931 is a high-dynamics PIMag voice coil tip/tilt platform for fast steering mirrors, featuring two orthogonal axes with a common center of rotation and a rotation range of ±2° per axis. It uses parallel kinematics for identical motion characteristics, direct position measurement with incremental linear encoders, and a friction-free flexure design. The platform has a D-sub 15 connector, a 1 m cable, and an overall mass of 290 g. It operates with a nominal voltage of 24 V and a peak current of 1.5 A RMS, with a force constant of 32.8 N·mm/A. Resonant frequency is 29 Hz unloaded, and settling time for a full-scale step is 20 ms max. The operating temperature range is 5 to 40 °C. The pivot point is positioned 3.2 mm below the platform surface.
Voice coil motors are direct drives. In direct drives, the force of the drive element is transmitted directly to the load to be moved without the use of mechanical transmission elements such as coupling, drive screw, or gearhead. Voice coil drives consist of a permanent magnet and a winding body that are located in the air gap of the magnetic field. When current flows through the winding body, it moves in the magnetic field of the permanent magnet. Thanks to their low weight and friction-free drive principle, voice coil drives are particularly suitable for applications that require high dynamics and high velocities at limited travel ranges. High scan frequencies and precision positioning are also possible with these drives, because they are free of the effects of hysteresis.
In a parallel-kinematic multi-axis system, all actuators act on a common platform. The minimum mass inertia and the identical design of all axes allow fast, dynamic, and nevertheless precision motion.
| PI (Physik Instrumente) L.P. | |
|---|---|
| Product Category | Voice Coil Actuators and Motors |
| Product Number | V-931 |
| Product Name | High Dynamics PIMag® Voice Coil Tip/Tilt Platform |
