Boasting a high rigidity column with Z-axis guideway and thick wall box ways, class-leading levels of vibration damping are claimed for the 20 tonne machine.
Both X and Z axes feature a hybrid face to the guideway that makes use of ‘aerostatic’ bearing pads that reduce load weight and friction resistance, which further aids positional accuracy and repeatability. Meanwhile, the Y-axis combines a twin drive to the spindle head that eliminates any need for a counterbalance and enhances axis response. Rapid traverse rates are 30 m/min.
The three linear axes are positioned via temperature controlled core-chilled ballscrews with double anchoring that supresses the onset of elongation. As a result, fine feed routines and circular machining accuracy is maximised.
Conventional worm gear drive to the table of the MCH5000R is replaced by a rigid speed reduction unit having minimal backlash and high resistance to overload conditions. A further hybrid guide supports heavy workpieces up to 800 kg, aided by a large diameter taper roller bearing. Either a six- or eight-station 500 mm by 500 mm pallet system can be specified.
The MCH5000R machine has a positioning accuracy as standard of ±0.005 mm over full axis strokes in X, Y and Z.Repeatability is ±0.002 mm.With linear scale options, the X-axis has a positioning accuracy of ±0.003 mm and repeatability in X, Y and Z is within ±0.001 mm.
A slide-type auto toolchange features variable speeds to help when replacing large tools that can be up to 270 mm diameter by 500 mm long and weighing up to 25 kg.Choice of magazines cover 40 tools as standard, plus available capacities of 60, 80, 116, 120, and 176 tools. Control is by Fanuc 31i B5.
