14. FUNCTIONS TO SIMPLIFY
Front face tapping cycles (G84) and side face tapping cycles (G88) can
be performed either in conventional mode or rigid mode.
In conventional mode, the spindle is rotated or stopped, in
synchronization with the motion along the tapping axis according to
miscellaneous functions M03 (spindle CW rotation), M04 (spindle CCW
rotation), and M05 (spindle stop).
In rigid mode, the spindle motor is controlled in the same way as a control
motor, by the application of compensation to both motion along the
tapping axis and that of the spindle.
For rigid tapping, each turn of the spindle corresponds to a certain amount
of feed (screw lead) along the spindle axis. This also applies to
acceleration/deceleration. This means that rigid tapping does not demand
the use of float tappers as in the case of conventional tapping, thus
enabling high–speed, high–precision tapping.
When the system is equipped with the optional multispindle control
function, the second spindle can be used for rigid tapping.