
4.DESCRIPTION OF PARAMETERS B-63950EN/02
- 274 -
5291 Loop gain multiplier for the spindle in rigid tapping (first gear)
5292 Loop gain multiplier for the spindle in rigid tapping (second gear)
5293 Loop gain multiplier for the spindle in rigid tapping (third gear)
Loop gain multiplier for the spindle in rigid tapping (fourth gear)
5294
[Input type] Parameter input
[Data type] Word spindle
[Valid data range] 1 to 32767
Each of these parameters is used to set a loop gain multiplier for the
spindle in rigid tapping each gear.
These parameters significantly affect the precision of threading.
Optimize these parameters as well as the loop gains by conducting a
cutting test.
Loop gain multiplier GC is obtained from the following equation:
LSPPLS
EPC
GC
××
×××
=
3602048000
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:
1100
36014096
2.213602048000
=
××
×××
=GC
PLS = 4096 pulse/rev
SP = 1
PC = 1
E = 2.2 V
L = 360 deg
NOTE
1 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
2 These parameters are used for analog spindles.