Patent ID: 6329624
Filing Date: 2001-12-11
Classification: B23D,B24B

Abstract:
A method of controlling a machine provided for machining saw blades and other workpieces (10) which have cutting teeth (12), comprisinga saddle (26) which is displaceable along a spindle axis (E) and transversely thereof under numerical control,a tool spindle (28) which is supported on the saddle (26) so as to be rotatable about the spindle axis (E) and adapted to be equipped with a disc-shaped tool (30) for machining a workpiece (10), anda workpiece slide (42) which is displaceable along a workpiece slide guide means (40) under numerical control and carries a workpiece support (44),the tool spindle (28) being adapted to be driven by a motor (84) at variable rotational speed, andthe tool (30) being an electrically conductive member of an electric circuit (30, 36, 46, 48, 10) which controls the machine and is closed through the workpiece (10) when the latter is touched by the tool (30), characterized in that,for sensing of the workpiece (10) by the tool (30), the tool spindle (28) is driven at a rotational measuring speed which is reduced considerably as compared to a rotational operating speed normally used for machining the workpiece (10).