num parameter manual - Documentation CN

8.3 Rigid Tapping
This function allows tapping to be performed without using an extensible tool-holder in order to improve the quality of
machining. The rigid tapping characteristics are set in parameters P62 and P63.
Rigid tapping requires the use of a performing spindle servo-drive and an angular spindle position measurement. All
during machining, the cycle axis position is strictly servoed to the angular spindle position.
This option can be used on spindles 1 and 2 controlled by groups 1 to 5.
Rigid tapping can also be used in conjunction with the inclined plane option.
8.3.1 Procedure
At the beginning of infeed, the cycle axis is synchronised on the spindle zero pulse. This synchronisation is repeated
each cycle.
The start of movement is anticipated with respect to the spindle zero pulse in order to obtain a gradual acceleration
(parameter P63, spindle crossing anticipation time constant).
When approaching the bottom of the tapped hole, the spindle slows down according to the preset deceleration value
(parameter P62, spindle deceleration).
In the hole bottom, a minimum spindle speed is applied to effectively reach the hole bottom (parameter P62, minimum
speed reference in the hole bottom).
The spindle then reverses and accelerates up to the programmed speed. The infeed and outfeed speeds may be
different. At the end of outfeed, the spindle reverses and the axis/spindle coupling is cancelled.
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Spindle
reference
Cycle axis
speed reference
Zone where the speed is
proportional to the distance
remaining to be travelled (P45)
Zone of constant
acceleration
Volts
M03
Deceleration
distance
Hole bottom
Minimum spindle speed reference (P62)
M04
Time