Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 9.SPINDLE SPEED FUNCTION (S FUNCTION)
- 239 -
2) Analog spindle
GS4s GS2s GS1s Maximum spindle speed parameter
0 0 0 No.5621
0 0 1 No.5622
0 1 0 No.5623
0 1 1 No.5624
1 0 0 No.5625
1 0 1 No.5626
1 1 0 No.5627
1 1 1 No.5628
- Actual spindle speed
The actual spindle speed is calculated from the feedback pulse received
from the position coder mounted on the spindle.
- Conditions for starting spindle speed fluctuation detection
If the specified spindle speed changes after G26 is issued or in spindle
speed fluctuation detection enabled mode, spindle speed fluctuation
detection begins when one of the following conditions is satisfied.
(1) The time specified in parameter No. 5722 elapses since a change
in the specified spindle speed after G26 is issued or in spindle
speed fluctuation detection enabled mode
(2) The actual spindle speed and specified spindle speed permission
ratio becomes lower than or equal to the value specified in
parameter No. 5701, so it is assumed that the specified speed has
been reached.
Actual spindle speed and specified spindle speed permission ratio
= (1 - Actual spindle speed / Specified spindle speed ) * 100
NOTE
Even if a condition for starting spindle speed
fluctuation detection is satisfied, spindle speed
fluctuation detection is not started under any of the
following conditions.
1 The machine is in spindle speed fluctuation
detection disabled mode (G25).
2 The specified spindle speed is 0 min
-1
.
3 A search due to program restart is under way.

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