
B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
159
ICONV2 + ICONV1
G1
G2
where,
ICONV1 : Current conversion constant before modification
(value specified when using the standard amplifier)
ICONV2 : Current conversion constant after modification
(value for amplifier being used)
G1 : Current detection gain of the standard amplifier that matches
the motor being used
G2 : Current detection gain of the amplifier being used for spindle
switching
[Current detection gain list]
Amplifier model Current detection gain G1, G2
SPM–2.2, SPM–5.5 60
SPM–11 30
SPM–15 20
SPM–22 15
SPM–26 10
SPM–30 7.5
SPM–45 6.67
16i/1601515i
Current prediction constant (MAIN side)
6612 3112 3112 4112
6752 3252
Current prediction constant (SUB side)
6230 3410 3266 4266
6410 3630
Data unit :
Data range : 0 to 32767
Standard setting : Depends on the motor model.
When spindle switching control is used, a nonstandard amplifier model,
which does not match the motor, may be used.
In such a case, modify the setting of this parameter according to the
conversion formula below.
IEST2 + IEST1
G1
G2
where,
IEST1 : Current prediction constant before modification
(value specified when using the standard amplifier)
IEST2 : Current prediction constant after modification
(value for amplifier being used)
G1 : Current detection gain of standard amplifier that matches the
motor being used
G2 : Current detection gain of the amplifier being used for spindle
switching
2.8.6
Supplement to the
Parameters