Computer numerically controlled machines

Details Computer numerically controlled machines Computer numerically controlled machines

1995-11-28

1997-10-28

Gordon, Paul P.

Boots, shoes, and leggings

36447428, 3644743, 318573, G06F 1900

Patent

active

056823193

ABSTRACT:
A computer numerically controlled (CNC) machine tool is provided in which a cutting tool is movable along a programmed path determined by a part program in a programmable control unit (PCU). A trajectory interpolator receives high level motion commands and a feedrate specification from the PCU to produce interpolated position commands. A position controller controls movement of the cutting tool in response to the interpolated position commands. The machine tool further includes a handwheel and a manual pulse generator (MPG) which can be used in MPG feed mode to control movement of the cutting tool incrementally along the programmed path in either the forward or reverse direction. In MPG feed mode, an MPG feed specification from an MPG position counter is superimposed onto the feedrate specification in the trajectory interpolator. MPG feed mode can be used advantageously during part program tryout, or during a cutting operation to retrace along the programmed path, to extract the cutting tool from the workpiece if the tool jams or breaks.

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