Effecting in-cycle measurement with preteritic CNC machine tools

Development of a low cost Touch Trigger Probe for CNC Lathes

“…Heidenhain TNC control series, for example, are able to automatically or manually carry through three-dimensional measurements and enables check functions, such as checking the dimensional accuracy of holes, determining feeds for finishing, checking workpiece geometry and identifying deviations from tolerances, identifying workpieces prior to machining and scanning 3D surfaces. Also, probing cycles are being widely developed and can be activated by a single line of information (Zhou et al [4]). …”

CNC centralized control for digitizing freeform surfaces by means of a conoscopic holography sensor integrated in a machining centre

“…1b). Such an evolution would provide an In-Cycle measurement system similar to that currently used by contact measurement probes and would also facilitate the use of Computer-Aided Inspection (CAI) systems [8]. Many studies have focused on the optical factors that influence the metrological quality of non-contact sensor measurement results prior to their use for OMM.…”

On‐machine measurement of workpieces with the cutting tool

“…On-machine measurement is a sensor-based machine tool measuring system. Today, wide ranges of various touch trigger probes have been applied to accurate on-machine measurement and inspection on CNC machining centers (Hermann, 1985;Janeczko, 1986;Lynch, 1994;Mou and Liu, 1992;Nickols and Martin, 1992;Szafarczyk and Missiewski, 1983;Zhou et al, 1996). It is necessary that probe-compatible software and hardware are available for the machine tool to respond to touch probe signals.…”

“…It is necessary that probe-compatible software and hardware are available for the machine tool to respond to touch probe signals. The controller uses the built-in commands or function codes to integrate the probing system (Zhou et al, 1996). However, many old machines are normally fitted with non probe-compatible controllers.…”

“…There are an increasing number of techniques that can be used to retrofit the early CNC machine tools to enable on-machine measurement with a probe system. They are software solutions, hardware solutions and remote microcomputer control solutions (Coleman, 1990;Gadsby et al, 1989;Gibson and Hoang, 1994;Zhou, 1996). The CNC retrofit can be obtained at a low cost.…”