Zone: CNC & Machine Controls

OVERVIEW: The CNC (computer numerical control) system of a machine tool includes the control unit itself, as well as less visible parts of the motion-control system such as the servomotors, drives and axis positioning devices. These components are part of any CNC machine tool, but they might be bought separately and retrofitted later on older machines that are upgraded or refurbished. Also part of the control system are sensors that may allow the control to make certain real-time decisions during unattended or lightly attended machining processes. These can include probes for measuring the position of the part or machined features, as well as monitoring systems for detecting the presence of the tool or the force that is being exerted in the cut.

Featured Zone Content

This part has taken eight setups

Move The Program Instead Of The Part

A complex five-axis part with hard-to-reach datums is machined in two setups instead of eight, thanks to a process that rewrites the tool paths to match the part's position....MORE

closed loop machining

Accuracy Gain From Linear Encoders

If the position of a machine tool’s axis is measured using a rotary encoder, then potentially the ballscrew is being asked to perform two contradictory functions. The ballscrew both drives the axis into position and indicates that position—because the ballscrew lies in between the encoder and the moving element of the machine. Control technology supplier Heidenhain calls this “semiclosed-loop” operation. ...MORE

Five-Axis Machining for Multi-Part Processing

Several parts at various orientations in one setup create what would seem to be a programming challenge, but control features make this cycle simple to create. ...MORE

Siemens Sinumerik

CNC Enables Four-Axis Turning without CAD/CAM System

The expanded contour machining cycle for Siemens’s Sinumerik controls now facilitates four-axis turning on lathes, enabling two turning tools, opposite one another, to machine a workpiece simultaneously for reduced machining time. ...MORE

CNC System Can Be Customized for Three Different Operators

Okuma America introduces OSP Suite, an open-architecture CNC system that combines the company’s “Intelligent Technologies” with various software applications to improve cycle and lead times while achieving optimum machine conditions. ...MORE

Grob chip in spindle detection system

Detecting Chips in a Milling Spindle

Chips in a milling spindle can subtly deform a tool assembly until the cutting tool is out of alignment. Grob's chip-in-spindle detection system detect stresses that may indicate chip interference. ...MORE

Leine & Linde PSE and PHE 900 rotary encoders

Rotary Encoders Employ EtherCAT Technology

The Leine & Linde PSE and PHE 900 series of rotary encoders, available from Heidenhain, are designed for heavy-duty applications and are now available with an EtherCAT interface option. ...MORE

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