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One Machine, Solving One Fundamental Problem

In manufacturing, there's a simple truth: You can't control what you can't measure.

No matter how beautifully the dimensional tolerances are marked on the design drawings, no matter how precisely the mold is made—is the final part actually (acceptable)? Will two mating parts get stuck or rattle? These questions can't be answered just by looking with your eyes or measuring with calipers. The fundamental reason the CROMA coordinate measuring machine exists is to provide manufacturing with an "absolutely reliable ruler"—achieving measurement accuracy at the micron level, finer than one-twentieth the thickness of a human hair.

Why is it so accurate?

The CROMA series comes from Serein Measurement (part of the Hexagon Group) and is widely used in industries such as automotive parts, molds, and machining. Where does its accuracy come from? A few key designs are worth mentioning:

All-aluminum frame: The beam and Z-axis are made of aviation-grade aluminum alloy with a hard anodized surface treatment. This material deforms very little with temperature changes and is lightweight—meaning less inertia during high-speed machine movement, allowing it to stop more decisively without any lag.

Patented 60° triangular beam: Look closely at CROMA's beam. Its cross-section is a triangle, not the common rectangle. A triangle has a lower center of gravity, providing higher rigidity with the same amount of material, resulting in more stable movement.

Air bearings: All three guide rails use air bearings—simply put, the machine "floats" on a cushion of air, with no metal-to-metal contact. This means no wear, a long lifespan, and extremely smooth motion.

Imported linear scale: Resolution of 0.078 micrometers. The installation method of the scale is also carefully designed—one end is fixed, while the other can expand and contract freely. When temperature changes, the scale adjusts itself, preventing measurement inaccuracies due to thermal expansion and contraction.

21 error compensations: Even the most precise machines have errors, but CROMA's control system uses algorithms to compensate for 21 spatial errors in real time, "calculating back" the inherent shortcomings of the mechanical structure using software.

In the end, what problem does it solve?

The essence of CMM measurement is turning "feel" into "data."

Without it, we can only say, "This part looks okay." With it, we can say precisely, "The center of this hole is offset by 0.05mm, which is within tolerance— (acceptable)."

And that certainty of 0.05mm is the foundation of precision collaboration in modern manufacturing. The CROMA isn't some mythical black technology; it's a reliable measurement tool validated through extensive practical use. You give it a part, and it gives you back a string of numbers—and that string of numbers is the sole basis for an engineer to judge "pass or fail."

Haina Company has its own CMM for one purpose: to make data visible, not just to say "looks acceptable." We must go through repeated measurement verification to ensure our molds are qualified. This is not only being responsible for our work, but also being responsible to our customers.