Rosa Surface Grinder Has Linear Motor Drives

NL Machine Tool Consulting has announced that Rosa Ermando has introduced the linear motor drive for the table of its grinding machines, series Steel Linear and R46. The linear motor is said to reach high speeds and accelerations, where during grinding a traverse speed of approximately 65m/min and accelerations of 2G are feasible. This increases the output capacity and/or reduction of machining times. It also generates high forces, where the thrust of the motor easily reaches up to 10,000N.

The linear motor has no mechanical components with power transmission components and avoids many disadvantages such as friction, mechanical backlash, and mechanical resonance due to elasticity. It is also said to be precise as it is controlled by a linear optical scale, which means positioning of table within micron precision is possible. The linear motor drive is claimed to be a flexible solution that allows creep-feed grinding, with slow table motion, interpolation between table and vertical axis, high-speed grinding till 65m/m. The machines are controlled through a Siemens Sinumerik 840 DiE CNC control unit and can be supplied with fourth and fifth axis for complicated components.

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