Coordinate Measuring Machine GREAT Series for Wide Range Inspection

The coordinate measuring machine in the GREAT series from Xi'an LEAD Metrology is designed for wide-range workpiece inspection. The series uses a unilateral elevated structure that gives the machine high dynamics and stability, and it is aimed at measurement and quality verification in automobile manufacturing, large mold work and precision spare parts. LEAD offers the GREAT series alongside the EXPERT, FLY, GREAT-D, TOP and SMART series.

Structure and Design

The machine uses an integral granite workbench. Granite gives the structure good rigidity and a strong bearing capacity, and it provides a wide workpiece placing space with convenient loading and unloading. The main guide rail is designed to be longer than usual, which increases the span of the guiding air bearing and substantially improves the guiding precision of the main rail.

The longest axis uses a high-precision tooth-shape drive, which gives good transmission rigidity. The other two axes use high-performance synchronous belts. That combination allows a fast motion velocity for measuring efficiency while reducing transmission inertia and improving acceleration. The Y-direction main guide rail uses the elevated structural style, so the inertia of the moving parts is reduced and the transmission parts sit closer to the center of inertia.

The Z-axis uses an adjustable pneumatic balance device. The counterbalance can be adjusted easily when different probe systems are fitted, so the machine can reach its best state with each probe. The buyer should confirm the probe system, the software and the controller with the supplier, because the measuring result depends on the complete system and not only on the mechanical frame.

Model Range and Accuracy

The GREAT series covers a range of measuring sizes. The X axis ranges from 1500 to 4000 millimeters, the Y axis from 2000 to 3000 millimeters and the Z axis from 1200 to 1500 millimeters, depending on the model. The maximum loading is 3000 to 4000 kilograms, and the machine weight ranges from about 8500 to 20500 kilograms. The overall size also varies with the model, so the buyer should check the footprint and the crane access before installation.

The accuracy is stated as MPEE from about 2.9 plus L/330 to 5.0 plus L/200 micrometers, depending on the model, and MPEP from 4.0 to 2.9 micrometers. The note on the page says that the accuracy of a machine with the same specification can vary with the configuration. The buyer should ask for the accuracy statement for the exact model, probe and software package being quoted.

Applications

The GREAT series is used for automobile manufacturing, large molds and precision spare parts. In an automobile plant, the machine can check fixtures, body parts and powertrain components. In a mold shop, it can measure a large mold base or a cavity insert. In a precision parts shop, it can verify a batch against a drawing and provide the inspection report.

The granite workbench and the wide opening make it easier to load a heavy part with a crane or a forklift. The buyer should plan the loading path, the floor capacity and the temperature control of the measuring room. A coordinate measuring machine is sensitive to temperature, vibration and dust, so the room should meet the supplier's installation requirements.

The page also lists related series for different needs: the EXPERT series for high accuracy and environmental adaptability, the FLY series for flexible measuring, and other bridge and gantry machines. A buyer with several part sizes can discuss a mix of machines with LEAD instead of forcing one model to cover every part.

Buying Notes

The order should state the model, the axis travels, the accuracy requirement, the probe system, the software, the controller, the temperature range and the installation conditions. The buyer should also ask for the acceptance test, the training, the warranty and the spare parts list. A site visit or a demo on a sample part is a practical way to confirm the machine before the order.

The foundation and the environment are part of the project. The buyer should confirm the floor thickness, the isolation method, the power supply, the air supply and the room temperature. A machine that is installed in a unstable environment may not reach its specified accuracy even if the frame is correct.

LEAD Metrology can be contacted through the email shown on the product page. The buyer should send the workpiece drawings, the tolerances and the required throughput so that the supplier can recommend the model and the probe configuration.

The coordinate measuring machine is a complete measuring system, and the result depends on the frame, the probe, the software and the environment. A clear specification and an acceptance test reduce the risk of a machine that does not fit the inspection task.