
B-65270EN/05 4.SERVO FUNCTION DETAILS
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(6) Cautions for combined use of fine acc./dec. and rigid tapping
CAUTION
Because this item was described before the
development of the spindle FAD function, part of
the description does not match the present
situations. When using the spindle FAD function,
see (7).
For details of the spindle FAD function, refer to
"FANUC AC SPINDLE MOTOR αi/βi series
Parameter Manual" (B-65280EN).
(a) Overview
Because using fine acc./dec. causes the servo axis delay (error) to
increase by 1 ms, rigid tapping with fine acc./dec. set up results in an
increase of synchronization error against the spindle. To avoid this
increase, use the following procedure to change the servo axis position
gain for rigid tapping.
NOTE
In advanced preview control mode, rigid tapping
cannot be used together with fine acc./dec. In this
case, disable fine acc./dec.
(b) Setup procedure
By setting the parameter below, the position gain can be automatically
changed only for the servo axis to establish synchronization.
(Parameter)
#7 #6 #5 #4 #3 #2 #1 #0
1749 (FS15i)
FADPGC
2209 (FS30i, 16i)
FADPGC (#3) Specifies whether to perform synchronization in rigid tapping mode
when FAD is set up, as follows:
1: To perform ← To be set
0: Not to perform
NOTE
1 After setting this bit, switch the power off and on
again.
2 If this parameter is set, the servo position gain
increases by 1 ms even when rigid tapping is not
used.
3 It is necessary to set this parameter for all axes
that are subjected to contouring.