Координатно-измерительные машины HEXAGON LEITZ PMM-F, PMM-G - страница 4

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LEITZ PMM-F

LEITZ PMM-G

MIGHTY ACCURATE

When a user chooses a Leitz PMM-F or Leitz PMM-G, they make a choice for maximum accuracy. Both coordinate measuring machines offer decisive advantages for the measurement of large workpieces:

Overhead designDual drives and dual scales
A modern overhead design keeps the mass ratios of the CMMMeasurement errors due to expansion, perpendicularity
constant to a high degree during operation. Deformations duringdeviations and contouring errors are avoided. The crossbeam is
the movement as well as during probing and scanning aredriven on both sides by precise ball screws. They are connected
eliminated. The overhead design allows unmatched dynamicsto the crossbeam by means of a patented coupling mechanism
and therefore very high throughput.in such a way that no undesired lateral forces are transmitted.
Economical usage in the production process over many years is
Solid granite guidesensured.
The massive guide side columns and cross beams are made of
approx. 40-million-year-old natural granite. Aluminum has beenServo-drives with ball screws allow high accelerations without
avoided in all the structures that determine the accuracy. Thatcompromises in the positioning accuracy. Very high speeds are
ensures insensitivity to temperature changes and a high degreereached even on very short paths.
of stability. The guideways in X and Y rest on 2 point support to
ensure the straightness for many years.The precision scales of the Leitz PMM-G are made of steel.
Therefore, the expansion coefficients of the machine and the
Air bearings in all axesworkpiece are the same. The measurement deviations in case of
Air bearings in all axes – specially developed precisiontemperature changes are reduced. The electronic interpolation
bearings with failsafe running properties andof the scales results in a resolution of only 20 nanometers.
electronic air gap monitoring. The supporting as well as the
guiding air bearings feature the largest possible bearing base,Collision protection and operator safety
which results in an accurate and wear-free movement.The Leitz PMM-F and PMM-G have the most comprehensive
safety and anti-collision system among all coordinate measuring
Ceramic Z-rammachines. The probe head, styli and the Z-ram are protected
The ceramic Z-spindle with oversize cross-section isby sensors, which stop the machine in case of a collision.
extremely resistant to torsion and has an automatic weightExpensive repairs will not be required, the »Cost of Ownership«
counterbalance. The machine accuracy is reached without anyis minimized.
limitation even when the Z-ram has been fully extended.
For operator safety, electronical and mechanical safety functions
Vibration isolationset a new standard.
Isolation against ground vibrations is ensured through the
integrated active pneumatic damping system.An electronic controller designed to meet todays requirements
carries out the complex movement sequences and measurement
The machine level is regulated independently of the workpiecedata collections. If customer service is required, the »Remote
load with a level control system. In this manner, the functions areDiagnostic« function facilitates fast assessments and hence
guaranteed even under difficult ambient conditions.keeps the downtimes short.