
B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
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(d) When the gain is not changed
If there is no interpolation between the Cs contouring control axis
and other axes, or if the Cs contouring control axis and servo axes
have the same position gain, the gain need not be changed. In this
case, set the parameter to indicate that gain switching is not
performed (PRM 5609#0, #1 = 1).
(e) For FS15-TT
Only the gain of the servo axis of the tool post to which the Cs
contouring control axis belongs is changed automatically.
(4) Return to the reference position in the Cs contouring control mode
In normal operation, to return to the reference position, rapid feed is
decelerated to the FL speed by the deceleration dog. In the Cs
contouring control mode, when the reference position return
command is input, the one-rotation signal is detected, then the
machine returns to the reference position. So the conventional
deceleration dog is unnecessary.
(a) Manual return to the reference position (jog mode)
The speed at which the machine returns to the reference position
is determined by the parameter for the maximum spindle speed
in the Cs contouring control mode (No. 3021).
The direction for reference position return is set in parameter
PRM 3000#3.
After switching to the Cs contouring control mode, the reference
position return mode is entered by setting the ZRN signal to ON.
One of the feed axis direction selection signals –Jn and +Jn is set
to ON. The Cs contouring control axis then moves in the
reference position return direction. When the reference position
is reached, reference position return completion signal ZPn is
output.
(b) Automatic return to the reference position (AUTO or MDI mode)
The speed of the first reference position return operation
performed after switching from the spindle rotation control mode
to the Cs contouring control mode is determined by the parameter
for the maximum spindle speed in the Cs contouring control
mode (No. 3021).
The direction of reference position return is set in parameter PRM
3000#3.
In the Cs contouring control mode, the second and subsequent
reference position return operations are performed at the speed set
by the parameters.
After switching to the Cs contouring control mode, the machine
returns to the reference position by executing the G00 or G28
command.
G28 command
If G28 is specified after switching to the Cs contouring
control mode, the Cs contouring control axis moves to a
middle point. The machine is returned to the reference
position, then is positioned at the reference position. Then,
reference position return completion signal ZPn is output.
When the machine has returned to the reference position, it
is positioned at the reference position then reference position
return completion signal ZPn is output.
G00 command
PRM No. 1005 #0=1
(ZRNx: Reference position return function is not provided
for each axis.)