Shop-floor Coordinate Measuring Machine
The Hexagon APOLLO Gantry-type Coordinate Measuring Machine (CMM) represents the apex of large-volume, high-accuracy metrology for the most monumental measurement challenges. Designed to measure extremely large and heavy workpieces-such as complete aircraft assemblies, wind turbine hubs, marine engine blocks, and massive machining fixtures-the APOLLO brings laboratory-grade precision to the factory floor or dedicated large-part inspection areas. Its gantry configuration provides an open, accessible measurement volume that bridges the gap between the capabilities of traditional bridge CMMs and portable systems.
The APOLLO's architecture is defined by immense strength and stability. It typically features a fixed, monumental base, often made of granite or highly stable epoxy granite, which forms an invariant reference plane. A massive, motor-driven gantry structure travels on precision rails along the longest axis (X-axis) over this base. The crossbeam of the gantry carries the Y-axis carriage, which holds the Z-axis ram and the measuring sensor. This design provides unparalleled rigidity, distributing the weight of the machine and the massive workpiece over a wide area to minimize deflection and ensure measurement integrity across its entire multi-meter travel range.
Achieving micron-level accuracy at this scale requires extraordinary engineering. The APOLLO incorporates a comprehensive suite of error compensation technologies. It utilizes high-resolution linear encoders, often complemented by laser interferometer systems, for direct, traceable position feedback. A sophisticated software error correction (SEC) system maps the machine's geometric errors (pitch, yaw, roll, straightness) across its entire working volume during factory calibration, compensating for them in real-time during measurement. Furthermore, advanced multi-zone thermal compensation systems monitor temperature gradients throughout the machine structure and the environment, dynamically adjusting measurements to negate the effects of thermal expansion-a critical factor for large-scale metrology.
The machine's versatility is enhanced by its ability to be equipped with a wide array of sensors. This includes ultra-long-stroke Z-axes, extended styli for deep reach, high-performance scanning probes for capturing dense surface data, and even integrated laser radar or laser tracker heads mounted on the gantry for hybrid measurement strategies. It is controlled by Hexagon's powerful metrology software, such as PC-DMIS, capable of handling massive point clouds, performing complex alignments for large assemblies, and generating comprehensive Geometric Dimensioning and Tolerancing (GD&T) reports.
The Hexagon APOLLO is more than a measuring device; it is a fundamental enabler of quality in industries that build the largest and most critical products. In aerospace, it verifies airframe assemblies; in energy, it inspects turbine components; in heavy machinery, it validates large-scale fabrications. It ensures that parts fit together perfectly the first time, reduces costly rework and assembly delays, and creates a definitive digital record of "as-built" conditions, thereby playing a crucial role in driving efficiency, safety, and innovation in advanced manufacturing.
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