PI Expands Line of Linear Motor Stages PI is expanding its PIMag series of high dynamics linear motor stages with two new models and a new motion controller. Stages are equipped with incremental and absolute-type linear encoders for direct position measurement and ironless three-phase motors and single-phase voice-coil drives. Ironless, non-cogging linear motors provide very smooth motion, and a high dynamic velocity range along with rapid acceleration. They are ideal for applications where high or extremely constant velocity is required, such as in optics inspection, metrology, photonics, interferometry, and semiconductor test equipment. The frictionless, zero-wear motor drives are also popular in fast automation applications, where reliability and maximum uptime are crucial. The V-551 models come equipped with an integrated absolute-measuring, encoder providing two nanometers resolution. Absolute encoders don’t require referencing and avoid accumulation of errors due to noise or cable issues. Precision crossed roller bearings with anti-creep cage assist guarantee excellent guiding accuracy (1 μm straightness/ flatness per 100 mm). With travel ranges of 5 mm, 10 mm, 20 mm, and a maximum velocity of 250 mm/s, the frictionless voice-coil drive of the V-52x series ensures high accuracy and long life. An integrated optical linear encoder and precision crossed roller bearings with anti-creep cage assist provide high positioning resolution and guiding accuracy. With very low moving mass and no moving cables, the voice-coil direct linear drive results in high scanning frequencies to tens of Hz while not being subject to wear and tear. The stages can also be easily stacked to make XY systems. PI’s compact C-891 motion controller is designed for sine-commuted 3-phase linear and rotary motors, is equipped with automatic detection of the motor phase. It can run on A/B digital or analog (sin/cos) encoder signals and also incorporates BiSS interface support for absolute-measuring encoders. PI (Physik Instrumente) Phone: (508) 832-3456 URL: www.pi-usa.us
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