wafermax t rotaryAerotech’s WaferMax T rotary stage is an excellent choice for applications that require high performance in a low-height package. Originally designed for the demands of precision wafer inspection, the WaferMax T has been applied to a multitude of applications.

  • Low profile for space-conscious applications
  • Direct-drive, brushless, slotless servomotor
  • Direct-coupled, high-accuracy rotary encoder
Model Aperture Maximum Speed Accuracy Maximum Load Additional information
WaferMax T 25.4 mm 400 rpm ±5 arc sec 40 kg View source


Superior Mechanical Design

Angular contact bearings are used to maximize performance with respect to wobble, moment stiffness and rotating friction. A thick-walled, precision-ground shaft further minimizes wobble.

Cable management is a snap with integral motor power and feedback connectors. Because the WaferMax T is a self-contained unit, it can be integrated easily into multi-stage stacks. Either a service loop or an integrated Aerotech cable management system (CMS) can be provided for a highly reliable solution.

Brushless Direct-Drive

To maximize positioning performance, the WaferMax T utilizes Aerotech’s S-series brushless, slotless motor. This motor has all of the advantages of a brushless direct-drive motor — no brushes to wear, no gear trains to maintain and high acceleration and high speeds. Since it is a slotless, ironless design, there is zero cogging, meaning that there is absolutely no torque ripple. This makes the WaferMax T ideal for applications requiring outstanding contoured motion, smooth scan velocity or precise incremental steps. The low inertia and zero backlash make the WaferMax T the ideal solution for applications requiring frequent directional changes.

Accurate Positioning

Performance is assured with a 10,000 lines per revolution encoder that results in 0.065 arc sec resolution. A 2048 line option is also available. The motor and high-performance rotary encoder are directly coupled to a common shaft.

Flexible Configurations

Aerotech manufactures a wide range of servo amplifiers and advanced controllers to provide a complete, integrated package.

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