Positioning device

A portal-type positioning device, comprising:

• two parallel linear guides including integrated linear drives that support individual X-carriages to provide for movement in an X-direction;
• a cross beam connected to the two X-carriages and including an integrated linear drive that supports a Y-carriage to provide for movement in a Y-direction perpendicular to the X-direction;
• a tool holder guided on the Y-carriage in a Z-direction that is perpendicular to the X- and Y-directions, and carrying a tool for machining a workpiece that is situated in an X-Y plane, the tool being arranged adjacent the cross beam at an offset in the X-direction;
• and
• a force frame arranged in the Z-direction above the tool and extending parallel to the cross beam, the force frame adapted to transmit a process force, directed in the Z-direction, that is acting on the tool, to the X-carriages;
• wherein the process force is generated by an electromagnet that acts between the force frame and the tool holder;
• and
• wherein the electromagnet includes an E-shaped core, and a coil wound around a center tooth of the E-shaped core.