
PROGRAMMING
B–63614EN/01
19. HIGH SPEED CUTTING
FUNCTIONS
371
NOTE
The maximum permissible feedrate v lowers as the circle
radius becomes small. When the calculated feedrate is
lower than the parameter setting value (No.1732), the
maximum permissible feedrate v will be assumed to be the
parameter setting value (No.1732).
(5)Rapid traverse
Either a linear interpolation or nonlinear interpolation type can be
selected for rapid traverse by parameter setting. If a linear interpolation
type is selected, the tool accelerates/decelerates before interpolation is
applied, and is positioned according to linear interpolation type
positioning. In addition, either a linear or bell–shaped acceleration/
deceleration type can be selected. The feedrate at movement and the
acceleration for linear acceleration/deceleration before interpolation are
obtained as explained below.
1) Feedrate at movement
The smallest value of the following expressions among the moving
axes is assumed to be the feedrate at movement.
rapid traverse rate for each axis (No.1420)
distance of block
distance of each axis
2) Acceleration for linear acceleration / deceleration before
interpolation
– In case of linear type acceleration / deceleration
The smallest value of the following expressions among the moving
axes is assumed to be the acceleration for linear acceleration /
deceleration before interpolation.
rapid traverse rate for each axis (No.1420)
time constant for each axis (No.1620)
distance of block
distance of each axis
– In case of bell–shaped type acceleration / deceleration
The parameter No.1621 (Time constant t used for bell–shaped
acceleration / deceleration in rapid traverse for each axis ) of the
axis that the value which is calculated by the above expression is
the smallest value becomes effective to the feedrate that is
calculated as linear type acceleration / deceleration.