CNC system powers 5-axis machining center for stone

A custom spindle motor and application-specific CNC system from NUM has helped Omag to create an innovative five-axis machining center that combines the functions of a former and a lathe for processing stone materials.

05/23/2011


Omag’s BlaNum Corporation - Omag Blade5de5 machine introduces a new level of flexibility for processing stone work pieces by supporting capabilities including sawing, milling, routing, turning, sculpting and polishing. One of the machine's key attributes is a high-performance spindle motor with a very large peak torque capability of 400 Nm, according to the company.

According to Marco Battistotti of Num Italy, “A willingness to partner with a constructor of special machines and share the risk of creating specific application and CNC solutions is at the heart of Num's business philosophy. In Omag’s case, there is a strong cooperation in the technological development for new machines."

Omag's Blade5 machine is based on a large overhead gantry-style structure, supporting an innovative multi-axis machine head. The gantry’s main horizontal X and Y axes are based on linear guides that employ ball screw drives and guide blocks fitted with recirculating ball bearings. These combine high load-bearing capabilities with smooth, backlash-free positioning. In the largest configuration of Blade5, both axes have a stroke length of up to 5 meters, giving machine operators a very large 25 square meters of working area. The vertical Z axis, which carries the machine head, employs the same type of technology and can raise the head 3 meters above the base of the system, enabling huge stone work pieces to be accommodated. The stone being processed can either be held in a fixed position on a large 3.5 x 2 meter worktop, or rotated by a lathe attachment for turning purposes.

The machine head spindle can accommodate a wide variety of cutting and forming tools, including a diamond cutting blade up to 1.6 meters in diameter. The head contains two positioning axes, which enable the spindle to be inclined by up to 140 degrees to the vertical and rotated laterally by as much as 380 degrees, conveying an exceptional level of flexibility to the process.

Omag’s PC-based CAD/CAM software includes a library of machine tools which can be freely requested by the operator; the physical tools are maintained in a rack to the side of the work area. Typically, these will include milling and turning tools, as well as one or more cutting blades. Tool changeover is handled completely automatically; when requested by the operator, the Blade5 machine automatically parks one tool and then places another on the spindle – which uses the industry-standard ISO 50 taper.

The machine’s HMI (human machine interface) is highly intuitive, and comprises a large touch-sensitive monitor, keyboard and dual joysticks for manually controlling movement when required.

As Marco Battistotti points out, “Omag’s Blade5 exemplifies the benefits of close collaboration between machine designers and numerical control specialists. The various configurations of Blade5 are proving extremely popular in the market.”

www.num.com Num Corporation



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