4. Adjusting synchronous tap
4.1 Setting parameters
The following table lists the parameters relating to
synchronous tap. They should be set by referencing the
settting method.
jelection
Screen
Parameter
Setting value
Setting method
Set the time constant of the position command
Fundamental
for synchronous tap.
specification
tap-t1
500-lOOO(msec)
Sets the start up time +a when the tap is
rotated up to the maximum speed by the S
command
(
e
=
200
msec).
Axis
specifica-
10
-
20
Sets the position loop gain in the synchro-
tion,
axis
Z
tag-g
Standard
set-
nous
tapping.
It should be the same as the
ting: 15
spindle parameter PGC.
Spindle
para-
Sets the gear ratio between the spindle and
meter
sgear
0
spindle encoder. If the spindle encoder is
not used,
0
(1:l)
should be set.
Spindle
para-
meter
PGC
10
-
20
Sets the position loop gain in the synchro-
Standard
set-
nous
tapping.
It should be the same as tap
ting: 15
g of the axis specification, axis
z.
Spindle
para-
meter
ORS2
bit F . . .
Sets the zero return direction
before the synchronous tapping.
bit E . . .
Sets the rotation direction of
the position loop detector.
In the semi-close state, it is 0.
bit
B
.__
When it is set to 1, excitation
takes place in the position loop
state.
The response increases
against the impact load.
Normally, it is set to 0.
bit A . . .
0: Close (when an encoder is
provided with the spindle).
1: Semi-close (when an encoder
is not provided with the
spindle.)
bit 9 . . .
Determines the direction of the
spindle rotation for position
loop motor command direction G84.
Spindle
para-
meter
TYP 0001
0000 . . . .
Performs the zero return at the
beginning of the synchronous
tapping.
0001 . . . .
Enters the position loop without
zero return.
GRAl-
GRA4
Number of gear The number of gear teeth of each gear
teeth on
should be precisely input.
spindle side
Spindle
para-
number of gear teeth
meter
GRBl
-
GRB4
Number of gear
Motor speed x
of motor
teeth on motor
number of gear teeth
side of spindle
= spindle speed
-117-
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