FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
B–62764EN/01
10. SPINDLE SPEED FUNCTION
(S FUNCTION)
137
The fluctuation of the spindle speed is detected as follows:
1. When an alarm is issued after a specified spindle speed is reached
Spindle speed
Check
Check
No check
r
r
q
qd
d
Specification of
another speed
Start of check
Alarm
Time
Specified
speed
Actual speed
2. When an alarm is issued before a specified spindle speed is reached
r
r
d
d
Check
p
No check
Check
q
q
Spindle speed
Specification of
another speed
Start of check
Alarm
Time
Specified
speed
Actual speed
Specified speed :
(Speed specified by address S and five–digit value)×(spindle override)
Actual speed : Speed detected with a position coder
p : Time elapses since the specified speed changes until a check starts.
q : (Percentage tolerance for a check to start)×(specified speed)
r : (Percentage fluctuation detected as an alarm condition)×(specified speed)
d : Fluctuation detected as an alarm (specified in parameter (No.4913))
An alarm is issued when the difference between the specified speed and the actual
speed exceeds both r and d.
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