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In-line probing for process improvement: advances in machine accuracy and probing technology make on-machine inspection a powerful process control tool for leaner, faster, more automated part processing.

Article Excerpt
Long used mainly for setup, on-machine probing is gaining widespread application and acceptance in process improvement. Drives to flexible machining, shorter lead times, tighter accuracy specifications and automated processing are shifting the industry focus away from traditional post-process quality control. Manufacturers are integrating probing with machining to overcome the traditional process bottleneck of making parts, then checking parts. The most expensive, nonvalue-added process in most shops is piece part inspection. Inspecting good parts--parts that meet all print specifications--wastes time, money and manpower.

Rather than back-end detection, attention is shifting to front-end prevention. In-line probing by the machine tool during the machining process gives manufacturers the means to make 100% good parts, right the first time, in the lowest possible total processing time.

Integrating metal cutting and probing allows programmed actions to be taken by the machine tool based on data collected, eliminating downtime for operator intervention and giving confidence for lights-out unattended operation.

New offline probing software makes it easy to apply probing measurement feedback and process control logic without specialized programming or probing knowledge. Probing routines can be programmed and simulated offline on CAD/CAM systems in the same manner by the same people and at the same time as toolpath generation.

When the machine tool's...