
B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
682
(1)The linear acceleration/deceleration time constant parameter for rigid
tapping specifies the time required for the spindle to reach its
maximum permissible rotation speed. The actual time constant is
obtained by calculating the ratio of the maximum permissible spindle
rotation speed to the S command. However, the bell–shaped
acceleration/deceleration time constant does not depend on that ratio.
Instead, it is specified directly in a parameter.
(2)If the time constant for a pull–out operation is valid (the TDR
parameter (bit 2 of parameter No. 5201) is 1), the bell–shaped
acceleration/deceleration time constants specified in parameter Nos.
5365 to 5374 are used.
(3)If the bell–shaped acceleration/deceleration time constants (parameter
Nos. 5365 to 5370) are 0, linear acceleration/deceleration is applied.
(4)If exponential acceleration/deceleration is selected for rigid tapping,
bell–shaped acceleration/deceleration is disabled.
Caution