Process

With through/centring hole drilling, the tool drills to the specified machining depth at the selected spindle speed and feed rate G01. The hole is produced in one operation down to the final drilling depth. After that, the tool returns to the specified retraction plane after expiry of an optionally programmed dwell time for chip breaking at rapid traverse G00.

If the centring diameter is specified (@P68), the drilling depth can be automatically calculated. In this case a programmed depth is ignored. The calculation uses the specified diameter and point angle (@P87). The calculated depth is executed depending on the reference plane. If no point angle is specified, an angle of 90° is assumed. If the centring diameter is not specified, a depth must be programmed.