
B-63783EN-1/01 9.SPINDLE FUNCTION
- 869 -
5969 Position gain multiplier (fifth stage)
[Input type] Parameter input
[Data type] Integerspindle
[Valid data range] 1 - 32767
Set the position gain multiplier of the analog spindle for gear 5 in the servo mode
(rigid tapping, spindle positioning, and so forth).
Position gain multiplier GC is obtained from the following equation:
PLS : Number of pulses output from the position coder (pulses/rev)
SP : Number of gear teeth on the spindle side
PC : Number of gear teeth on the position coder side
E : Specified voltage (V) for turning the spindle motor at 1000 min
-1
L : Angular displacement of the spindle (degrees) per spindle motor rotation
Example:
For the spindle motor and gear ratio given below, GC is calculated as follows:
PLS = 4096 pulses/rev
SP = 1
PC = 1
E = 2.2 V
L = 360 deg
Note) On the assumption that the spindle motor used turns at 4500 min
-1
at 10 V,
2.2 V is required to turn the spindle motor at 1000 min
-1
.
LSPPLS
EPC
GC
××
×××
=
3602048000
1100
36014096
2.213602048000
=
××
×××
=GC
5970 Drift compensation value (fifth stage)
[Input type] Parameter input
[Data type] Integerspindle
[Unit of data] Velo
[Valid data range] -500 - 500
Set the drift compensation value of the analog spindle for gear 5 in the servo mode
(rigid tapping, spindle positioning, and so forth).
Drift compensation DC (a voltage equivalent to positional deviation) is obtained
from the following equation:
G : Position gain in servo mode (0.01/sec)
GC : Position gain multiplier
ER : Positional deviation (detection unit)
ERGCGDC ×××= 000000192.0