- Voice Coil Linear Motor-Driven Scanning Stages
Voice coil motors are based on the electromagnetic principle well-known from loudspeakers. They are best suited to motion ranges from ~0.5mm to 25mm (1 inch). Voice-coil motors are frictionless, wear-free, and can provide highly dynamic and precise motion, as every music lover can attest to. When used in scanning and positioning stages, they are often combined with crossed-roller rails to provide high precision guidance. Linear encoders integral to the scanning stages provide feedback to a closed-loop motion controller to allow for precise position and velocity control.