Multi-Purpose VMC with Tilting Spindle Head

The Doosan VCF850LSR, a vertical machining center featuring a traveling column design with a tilting spindle head, is capable of machining a range of parts, using as much as five axes simultaneously.

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The Doosan VCF 850LSR, a vertical machining center featuring a traveling column design with a tilting spindle head, is capable of machining a range of parts, using as much as five axes simultaneously.

The VCF 850LSR is a large capacity, travelling column design VMC with a tilting B-axis head. This versatile design allows for machining on multiple sides of a workpiece at once. The head can rotate 110 degrees on either side of vertical, enabling the VCF 850LSR to machine large and complex parts in a single setup. With its included 500 mm (19.685") rotary table, as much as five sides of a part can be accessed.

Each axis is driven by a high precision double-nut ballscrew, which is centered between the guideways and supported on both ends by angular contact thrust bearings. All ballscrews are cooled by circulated, refrigerated oil at all critical components, including the ball nut, support bearings and the motor housing. This system, coupled with a double pretension design, provides positioning repeatability with virtually no thermal growth. All axes have large-diameter ballscrews that are directly connected to oversize AC servo drive motors without gears or belts in order to help eliminate backlash, the company says.

The X, Y and Z axis use absolute-type linear glass scales for higher positioning accuracy that do not require referencing at power up. The scales virtually eliminate the impact of slides and ball screw thermal expansion and backlash.  This improves the ability to hold tight part tolerances with fewer offset changes.

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