Optimized CNC Control

CNC solutions, automation concepts for optimizing machine tool productivity and specialized software solutions are the focal points of developments by CNC suppliers. The goal is user-friendly programming, effective operator interfaces for CNC turning and milling machines and a focus on a comprehensive portfolio of tools for optimizing programs and workpieces.

With the introduction of the new CNC solutions, suppliers are updating CNC interfaces with new Ethernet, Profibus, SERCOS and other networking solutions, and making it easier for operators to integrate their machines into machine networks. The combination of advanced software and new distributed control platforms enables distributed and simple configuration of automation solutions. The trend to modular and easily scalable CNC is being implemented with machine tools and machining centers that can be assembled individually using standard platforms and modules.

ADVANTAGE 900 CNC CONTROL

The Advantage 900 CNC pack-age from Delta Tau combines a new operator console with a four, six or eight-axis controller/amplifier specifically designed to meet next-generation CNC control requirements. The 900 CNC leverages the capabilities of the operator interface PC and a real-time DSP to handle the motion related tasks of the CNC machine. The combination delivers a PC front end and real-time servo performance. The integrated digital amplifier and control streamlines manufacturing which significantly reduces cost, and the installation process requires less wiring, space and machine setup time. Because the 900 CNC is modular, it allows for a flexible number of machine configurations. The 900 CNC supports high-speed machining, dynamic multi-block segmented look-ahead for path fidelity at any speed, forward and inverse kinematics for non-traditional mechanical configurations, 5-axis programming capability, and lead screw and backlash compensation. It also features a 15-inch LCD screen, a wireless remote pendant with user-definable function keys, configurable 5.0 HMI NC software and the NC Autopilot quick setup tool.

COMPACT CNC PLATFORM

The IndraMotion MTX compact CNC platform from Bosch Rexroth is a space-saving, rack-mounted version for distributed control systems used in high production machining centers, handling systems, or simple auxiliary units. The company says it is the first controller-based CNC for up to eight axes in two NC channels that includes a fast IndraLogic PLC that can process up to 200 NC blocks per second. The controller allows equipment with multiple stations such as rotary and linear transfer machines to be designed by networking multiple MTX compact modules to a single PC-based HMI at the head station or zone controller main station. The control system has 16 inputs/outputs and capacity to integrate additional I/O ports. The module's simple operation and programming are complemented by network communication via Ethernet or commonly used fieldbuses such as Profibus and DeviceNet. The MTX also offers SERCOS drive communication, a full Profibus DP master/slave interface and an Ethernet interface.

MACHINING POINT CONTROL IMPROVES PRECISION

An enhancement to GE Fanuc Automation's servo system can detect and control machine vibration at the machining point, improving precision and reducing cycle times for large machine tools and lasers. The Machining Point Control's acceleration rate sensor unit simultaneously detects the acceleration rate at the machine of three axes. Output is rapidly taken into account by the CNC servo loop through a separate detector interface unit. The servo system software then uses the detected acceleration rate to control the motor's motion to reduce vibration, stabilizing the machine at the tool tip and enabling precision machining and quick positioning. The acceleration sensor detects vibration in real-time and updates the servo system at a very fast rate to effectively suppress the actual resonance seen by the machine. GE Fanuc says this is the first time that machine vibration is suppressed dynamically by use of acceleration sensors fed back into the CNC servo loop.