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Fast Tool Servo

  • FTS 5000 +

    FTS systems provide a rapid method to fabricate freeform surfaces including: light management micro-structures, toric optics, and mechanical features in contact lenses, lens arrays and laser collimators. FTS cutting is typically 10-15 times faster than other servo tool cutting methods (e.g. XZC machining).

    With the FTS 5000 Precitech is once again defining the state of the art of ultra-precision machining. It addresses the emerging needs of many new markets, including Head-up-displays (HUD) and Virtual Reality (VR).

    Five millimeters of travel and an unprecedented peak acceleration of 40 g’s are a combination unmatched in the industry. This translates into significantly faster production of higher-complexity parts.

    At the same time the FTS 5000 tractor fits in a compact package the size of a standard tool holder, saving machine space. It integrates seamlessly with current Precitech machining centers.

    • Make parts 3x faster than competitive products with unprecedented peak acceleration of 40 g’s
    • Save valuable tool space with compact footprint (equal to a standard tool holder)
    • Expand your product portfolio with 5 mm of travel
    • Ease of use enabled by seamless integration with the machine controller via the FastCom III controller

    Key Specifications
    Typical performance Surface roughness < 4 nm Sa
    Form accuracy < 0.3 μm P-V
    Peak acceleration 400 m/sec2 (40 g's)
    Continuous acceleration 250 m/sec2 (25 g's)
    Travel 5000 μm
    Typical acceleration 2000 μm @ 100 Hz
    1000 μm @140 Hz
    250 μm @ 280 Hz
    100 μm @ 440 Hz
    Operating Temperature 18-24 C
    Operating Humidity 20-60%
    For operation outside these temperature or humidity ranges please contact Precitech
    Dynamic Step Response Control (DSRC)

    Traditional fast tool servos will become unstable and fault at command steps greater than 20 µm. Exclusively available on the FTS 5000, DSRC increases the size of the allowable step command to up to 350 µm. It also drastically decreases response time to a step change in velocity, which is common in lens array applications.

    DSRC off full fast tool servo

    Position in response to a 10 and 17 μm step change with DSRC off. Note the rapid (~0.2 ms) settling time for the 10 µm step and the onsetting of instability at the 17 µm step.

    DSRC on full fast tool servo

    Position in response to a 10, 17, and 350 µm step change with DSRC on. Note the elimination of the 17 µm step instability and the stable response for the 350 µm step.

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