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

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 design Dual drives and dual scales A modern overhead design keeps the mass ratios of the CMM Measurement errors due to expansion, perpendicularity constant to a high degree during operation. Deformations during deviations and contouring errors are avoided. The crossbeam is the movement as well as during probing and scanning are driven on both sides by precise ball screws. They are connected eliminated. The overhead design allows unmatched dynamics to 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 guides ensured. The massive guide side columns and cross beams are made of approx. 40-million-year-old natural granite. Aluminum has been Servo-drives with ball screws allow high accelerations without avoided in all the structures that determine the accuracy. That compromises in the positioning accuracy. Very high speeds are ensures insensitivity to temperature changes and a high degree reached 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 axes workpiece are the same. The measurement deviations in case of Air bearings in all axes – specially developed precision temperature changes are reduced. The electronic interpolation bearings with failsafe running properties and of 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-ram machines. The probe head, styli and the Z-ram are protected The ceramic Z-spindle with oversize cross-section is by sensors, which stop the machine in case of a collision. extremely resistant to torsion and has an automatic weight Expensive repairs will not be required, the »Cost of Ownership« counterbalance. The machine accuracy is reached without any is minimized. limitation even when the Z-ram has been fully extended. For operator safety, electronical and mechanical safety functions Vibration isolation set 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 workpiece data collections. If customer service is required, the »Remote load with a level control system. In this manner, the functions are Diagnostic« function facilitates fast assessments and hence guaranteed even under difficult ambient conditions. keeps the downtimes short. 4 LEITZ PMM-F / PMM-G | XXL-Class CMMs and Gear Inspection Centers