
1.START-UP FANUC AC SPINDLE MOTOR αi series B-65280EN/05
- 20 -
15i 16i
3500 4500
Denominator of arbitrary gear ratio between spindle sensor and spindle
(HIGH) CTH1A=0
3501 4501
Numerator of arbitrary gear ratio between spindle sensor and spindle (HIGH)
CTH1A=0
3502 4502
Denominator of arbitrary gear ratio between spindle sensor and spindle
(LOW) CTH1A=1
3503 4503
Numerator of arbitrary gear ratio between spindle sensor and spindle (LOW)
CTH1A=1
Unit of data :
Valid data range : 0 to 32767
Standard setting : 0
These parameters set conversion coefficients (numerator,
denominator) for using the detection arbitrary gear ratio function
(DMR function) by multiplying a spindle sensor (α position coder, α
position coder S, separate BZi sensor, or separate CZi sensor)
feedback signal by a gear ratio to produce a spindle position feedback
signal.
When the spindle rotates Q times while the motor shaft rotates P times
(there is no common divisor other than 1 for P and Q), settings are:
No. 4500 (No. 4502 when CTH1A = 1) = P
No. 4501 (No. 4503 when CTH1A = 1) = Q
When one of these parameters is set to "0", it is assumed to be "1".
NOTE
1 This parameter is valid with 9D50 Series F (06)
edition or later and 9D70 series A (01) edition or
later.
2 When this parameter is used in a configuration
having no external one-rotation signal (proximity
switch), set the following parameters.
No.4007#6=1 : Alarms related to positional
feedback signals (in non-Cs mode)
are not detected.
No.4016#5=0 : Alarms related to positional
feedback signals (in Cs mode) are
not detected.