Programming manual
CNC 8070
TOOL PATH CONTROL
Rígid tapping (G63)
6.
(SOFT V02.0X)
115
6.8 Rígid tapping (G63)
When rigid tapping, the CNC interpolates the movement of the
longitudinal axis with the spindle.
Programming
To define a rigid tapping, program function G63 and then the
coordinates of the end point of the thread which may be defined in
Cartesian or polar coordinates. The thread pitch will be calculated by
the CNC depending on the active feedrate "F" and spindle speed "S"
(Pitch = Feedrate / Spindle speed).
Function G63 starts the spindle in the direction indicated by the
programmed speed "S" ignoring the active M3, M4, M5 or M19
functions. A negative turning speed can only be programmed if
function G63 is active.
Since G63 does not withdraw the tool automatically after the tap, an
inverted tap must be programmed in order to withdraw the tool by
inverting the turning direction of the spindle (by changing the sign of
the "S" speed). If the thread is made with a cutter tip, the tool may be
also be withdrawn by orienting the spindle (M19) and separating the
tool tip away from the thread.
For rigid tapping, the machine must have a rotary encoder installed on
the spindle.
i
...
G94 F300
G01 G90 X30 Y30 Z50
G63 Z20 S200
...
The thread pitch will be:
To make a 4 mm pitch thread in X30 Y30 Z0 in a single pass with a depth
of 30mm.
G94 F400
G01 G90 X30 Y30 Z0
G63 Z-30
M19 S0
G91 X3
G90 Z10
G94 F400
G01 G90 X30 Y30 Z0
G63 Z-30 S100
G63 Z0 S-100
G01 Z10
F
S
---
300
200
------- --
15mm,==
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