
11. OPTION RELATED TO SPINDLE
B–65162E/03
478
(1) For the α Spindle Sensor
(a) Detection resolution and precision of BZ sensor + internal high–resolution circuitry
BZ sensor
.
128/128H 256/256H 384 512
1 Resolution [Typ.] 0.0016° 0.0008° 0.0006° 0.0004°
2 Precision [Typ.] (Note) 0.04° 0.03° 0.04° 0.04°
NOTE
It is assumed that the fluctuation of the shrink–fit section of
the spindle is within 5µm, and errors on the machine are
excluded. (The precision depends on the mounting
accuracy of the detector.)
(Tip)
The precision is determined by the sum of previsions 1 through 3.
BZ sensor
.
128/128H 256/256H 384 512
1
Electrical division pre-
cision of one gear tooth
and gear pitch preci-
sion [Typ.]
0.015°
2
Gear pitch circular fluc-
tuation precision [Typ.]
0.02° 0.01° 0.02° 0.02°
3
Machine side shaft fluc-
tuation precision [Typ.]
A fluctuation can be converted to a precision
according to the following formula:
Precision (°) = Vibration (mm)360 (°)/gear
circumference (mm)
Example: When there are 256 teeth and a fluc-
tuation of 0.005 mm
Precision = 0.005360/103.2/π 0.005°
(b) Detection resolution and precision of MZ sensor + internal high–resolution circuitry
BZ sensor
No. Item
α0.5 motor
(64 teeth)
α1 to α3 mo-
tor (128 teeth)
α6 motor or
up (256 teeth)
1 Resolution [Typ.] 0.0032° 0.0016° 0.0008°
2 Precision [Typ.]
The precision depends on the detector of (1)–(a)
mounted onto the spindle.
(2) For a High–resolution Magnetic Pulse Coder and High–resolution Position Coder
No. Item
1 Resolution [Typ.] 0.001°
11.3.3
Specifications