B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
667
5310 Positional deviation limit imposed during tapping axis movement 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 during tapping
axis movement in rigid tapping. A value that falls outside the valid data
range, described above, can be specified in parameter No.5314.
NOTE
1 When a high–resolution detector is used, the unit must be
multiplied by 10.
2 When rigid tapping is performed using the second spindle
• When the SPR parameter (bit 1 of parameter No.5204)
is set to 0, the setting of parameter No.5310 (or No.5314)
is applied to the second spindle, as well as to the first
spindle.
• When the SPR parameter (bit 1 of parameter No.5204)
is set to 1, the settings of parameter No.5350 is applied
to the second spindle.
5311 Limit value of spindle positioning deviation during movement in rigid tapping.
[Data type] Word
[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.9.10.8 (c) Connection Among Spindle Motor, Spindle and Position Coder
(Calculation example)