High Speed Cutting with SINUMERIK 840D

High speed cutting with SINUMERIK 840D satisfies all the demands of modern production in one productivity-increasing Siemens CNC control system.

The technology behind the SINUMERIK 840D makes 100% perfect high-speed cutting, from technology that is based on an integrated multiprocessor system and two Intel Pentium processors.

By using the Siemens innovative SINUMERIK 840D control and digital drive technology SIMODRIVE 611D, the limits of high speed machining are constantly being extended. With SINUMERIK control systems, technology related milling machining centers are capable of achieving a precision of better than 1 micron and in combination with linear motors, acceleration rates far beyong 1 g (=9,81 m/s2).

Features of SINUMERIK 840D which play important roles in providing the utmost machining result for high speed cutting are::

• Look Ahead. Short accelerations and decelerations on machine tools generate oscillations, which can impair the surface quality. Look-Ahead prevents these oscillations and smooths the preset speed profiles.
• Traverse without following errors with Feed Forward Control. Inaccuracies caused by following errors are eliminated.
• At high speeds, jerks (changes in acceleration) cause stress to the machine tool's mechanical system. Jerk Limitation enables the machine to achieve optimum acceleration behaviour and noticeably reduces wear on the machine's mechanical parts.
• Precise components surfaces in the CAD/CAM system are approximated in conventional CNC's using linear blocks resulting in uneven cutting patterns. NURBS, the interpolation process in the SINUMERIK 840D, means free forms can be interpolated accurately, even at high feedrates.
• Active Vibration Damping. Resonant frequencies of the machine are selectively dampened using digital filters.Machines with SINUMERIK work more accurately.
• Highest Measuring System Resolution with four million increments per motor revolution to ensure positional accuracy
• Electronic Compensation for mechanical errors such as axis reversals, ball screw errors, machine geometry, and measuring system errors
• SINUMERIK CNC controls utilize High Speed Networking for quick transmission and have large hard disks for easy storage of CAD/CAM generated programs.