Process

For deep hole drilling, the tool drills to the specified machining depth in multi-step operations at the selected spindle speed and feed rate G01. The number of infeeds is programmable. The resulting feed depth is determined internally in the cycle based on the final drilling depth. A different feed depth can be defined for the first infeed. If the first feed depth (@P10) is specified but not the number of infeeds (@P11), the parameter @P10 acts as the [mm, inch] input for feed depth. When the optional parameter @P173 is used, any Z position can be positioned in an existing pilot hole before the actual drilling process. Please note that for safety reasons the initial speed of the spindle must not exceed 100 rpm. The parameter @P175 is used to define the spindle speed for the actual drilling process. When the optional parameter @P173 is used, the parameters @P174, @P175 become mandatory parameters. They are used to prevent deformation or damage to very long drilling tools. They are always fed into the pilot hole in the opposite direction of spindle rotation (the cycle does this automatically). The parameter @P176 allows you to define a dwell time that gives the machine time to adjust the spindle speed and the direction of spindle rotation. The dwell time is also used at the base of the hole at the end of the drilling operation to achieve a total spindle stop.