
4. DESCRIPTION OF PARAMETERS
B–63010EN/02
282
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.4.27 (c) Connection Among Spindle Motor, Spindle and Position Coder
NOTE
1 The detection unit is α = La/2048 when the position coder
built–in spindle motor uses a position coder of 512 pulses
per revolution.
2 When rigid tapping is performed using the second and third
spindles
• When the SPR parameter (bit 1 of parameter No.5204)
is set to 0, the setting of parameter No.5311 is applied to
the second and third spindles, as well as to the first
spindle.
• When the SPR parameter (bit 1 of parameter No.5204)
is set to 1, the settings of parameters No.5351 and
No.5355 are applied to the second spindle and third
spindle, respectively.
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.
NOTE
When rigid tapping is performed using the second and third
spindles
• When the SPR parameter (bit 1 of parameter No.5204)
is set to 0, the setting of parameter No.5312 is applied to
the second and third spindles, as well as to the first
spindle.
• When the SPR parameter (bit 1 of parameter No.5204)
is set to 1, the settings of parameters No.5352 and
No.5356 are applied to the second spindle and third
spindle, respectively.
(Calculation example)