Linear Stage uses direct-coupled brushless motor.

Press Release Summary:

Suited for space-constrained applications, ATS125 incorporates brushless rotary motor and hard-coated aluminum cover. Vertical orientation of side seals deflects debris away from stage. Square-wave encoder output, with net resolution of 1 micron for 10 mm ball screw and 0.5 micron for 5 mm ball screw, is standard. Available with standard- and precision-grade ball-screw options, product offers travels to 600 mm and operates at speeds to 600 mm/sec.

Original Press Release:

Small, Side-Sealed, Hard-Cover Linear Stage Uses Direct-Coupled Brushless Motor For High Servo Bandwidth And Smooth Velocity Aerotech's ATS125 Series Linear Ball-Screw Stage

o Travels up to 600 mm

o Speeds up to 600 mm/s

o Side-seal design with hardcover

o Low cost and high performance

o Integral brushless rotary motor

o Standard and precision-grade options

The ATS125 is Aerotech's smallest hardcover, side-sealed linear stage. The integral brushless motor reduces the overall footprint of the stage enabling its deployment in space-constrained applications, while the hardcover provides protection from debris created in the manufacturing process. The robust aluminum cover is hard-coated for scratch resistance, and the side seals keep dirt and particulates out of the stage and protect the bearing surfaces from contamination. The vertical orientation of the seals easily deflects debris away from the stage. Top seal designs can collect debris, resulting in the eventual failure and replacement of the sealing mechanism.

Integral Motor

The ATS125 with integral motor option directly couples a brushless motor to the ball-screw drive. This eliminates the flexible coupling typically present in screw-driven stages, yielding a stiffer system with higher servo bandwidth. The lack of a coupling also improves system reliability by removing a component susceptible to failure. The integral motor is enclosed in a modular subassembly that, if required, can be easily replaced in the field. The motor is based on a slotless design that provides ultra-smooth velocity operation due to the complete absence of torque ripple.

Highly Configurable

Standard- and precision-grade ball-screw options are available to closely match the price/performance point of a wide variety of positioning applications. Square-wave encoder output with a net resolution of 1 micron for 10 mm ball screw and 0.5 micron for 5 mm ball screw is standard with the integral motor. An optional analog output encoder can be coupled with external interpolation electronics to provide higher resolution. The stage is also available specially prepared for vacuum operation. A holding brake can be added to the integral motor modular assembly for vertical applications.

For more information, please contact Steve McLane at 412-967-6854 or


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