
2.EXPLANATION OF OPERATION MODES FANUC AC SPINDLE MOTOR αCi series B-65280EN/05
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15i 16i 30i
3056 4056 4056
Gear ratio (HIGH) CTH1A=0, CTH2A=0
3057 4057 4057
Gear ratio (MEDIUM HIGH) CTH1A=0, CTH2A=1
3058 4058 4058
Gear ratio (MEDIUM LOW) CTH1A=1, CTH2A=0
3059 4059 4059
Gear ratio (LOW) CTH1A=1, CTH2A=1
Unit of data : (Motor rotation for one rotation of spindle)
/ 100
(When parameter No. 4006 #1 (GRUNIT) is 1, motor rotation
/ 1000)
Valid data range : 0 to 32767
Standard setting value : 100
These data are used to set the gear ratio between spindle and spindle
motor.
Example :
When the spindle rotates once, set "250" as the data when the
motor rotates 2.5 times.
NOTE
1 A parameter is selected by the input signals CTH1A
and CTH2A. Ensure that the gear or clutch state
corresponds to the input signals CTH1A and
CTH2A. When the signals are not input correctly, the
overcurrent alarm (SPM alarm 12) can be issued.
2 When using a position coder, be sure to set this
parameter. If this parameter is not set correctly, the
velocity error excess alarm (SPM alarm 02), motor
binding alarm (SPM alarm 31), or gear ratio
parameter setting error alarm (SPM alarm 35) may
be detected.
3 When an improper value is set in this parameter, an
unexpected operation can occur. For example, the
spindle can continue rotating without stopping at the
time of orientation. So, be sure to set a proper gear
ratio.
15i 16i 30i
3078 4078 4078
Gear switch timer
Unit of data : 1sec
Valid data range : 0 to 500
Standard setting value : 0
For a spindle that has a gear switch mechanism, this parameter sets a
period of time from the start of a gear switch sequence (input of the
TLML signal) until the gear shifter is actually started. For details, see
Chapter 3, "I/O SIGNALS (CNC ↔ PMC)", in Part III.
For a spindle that has no gear switch mechanism, set this parameter to
0.