PDF Fanuc Power Mate i-D/H Parameter Manual

B63180EN/02
4. DESCRIPTION OF PARAMETERS
137
NOTE
When a highresolution detector is used, the unit must be
multiplied by 10.
5311
Limit value of spindle positioning deviation during movement in rigid tapping.
[Data type] Word type
[Unit of data] Detection unit
[Valid data range] 1 to 32767
This parameter sets the limit value of a spindle positioning deviation
during movement in rigidtapping.
Limit value = S 360 100 1.5 / (60 G α)
where
S : Maximum spindle speed in rigid tapping
(Setting value of parameter Nos. 5241 and greater)
G : Loop gain of rigid tapping axis
(Setting value of parameter Nos. 5280 and greater)
α : Detection unit
Spindle
Motor
Spindle
Position
coder
1 : 1 : 2
P. C
S = 3600
G = 3000
L = 360 degrees (One spindle rotation per spindle motor rotation)
α = La/4096
= 720 degrees/4096
= 0.17578 degrees
La = 720 degrees
(One position coder rotation requires two spindle rotations (= 360
degrees 2)).
4096 = Detection pulse per position coder rotation
Setting value =
= 6144
3600 360 100 1.5
60 3000 0.17578
Fig.4.20 (c) Connection Among Spindle Motor, Spindle and Position Coder
NOTE
The detection unit is α = La/2048 when the position coder
builtin spindle motor uses a position coder of 512 pulses
per revolution.
5312
Positional deviation limit imposed while the tapping axis is stopped in rigid tapping
[Data type] Word
[Unit of data] Detection unit
[Valid data range] 1 to 32767
This parameter is used to set a positional deviation limit imposed while
the tapping axis is stopped in rigid tapping.
(Calculation example)

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