Table of Contents
Advertisement
4. PARAMETERS FOR POSITIONING CONTROL
1) Travel value per feedback pulse
Z
∆
S=10[mm]
Z
∆
S
10[mm]
∆
I=
=
Pf
25 8192
2) Unit magnification (A
Since ∆l is 0.0001[mm], the unit magnification (A
3) Travel distance per revolution (A
10[mm] 1
A
=
L
25
4) Number of pulses per revolution (A
A
= 8192 [PLS/rev] ... fixed according to the encoder model.
P
(2) Setting method 2
If A
cannot be set by using setting method 1, calculate the numerator and
L
denominator of the electronic gear, and set A
as the denominator.
Servo system CPU
Command
The electronic gear is represented by the following relational expression.
Number of feedback pulses (Pf)
Electronic gear =
Travel value per revolution ( S)
=
Travel value per motor revolution (A
Example: With the example configuration shown above, and under the following
conditions(e);
Gear ratio=Z
Ball screw pitch=25.4[mm]=25.4 1000 = 25400.0[
25.4[mm]
A
=
L
29
and A
cannot be set, calculate as follows....
L
Electronic gear
Elecronic gear
Pf
=
∆
S
25.4[mm]
Here, since the setting range of A
is 0.1 to 6553.5 [µm], reduce them to within their setting ranges.
A
P
A
A
L
M
Thus,
A
=19968[PLS]
P
A
(Note)=1587.5[
L
A
=1
M
1
1
=10[mm]
25
2
=0.000049[mm]....
)
M
)
L
=0.4[mm]=400.0[
m]
Electronic gear
A
P
A
A
L
M
∆
Number of pulses per revolution (A
: Z
=1 : 39
1
2
=0.65128205[mm]
=651.28205[
m]
8192[PLS]
319488
=
1
25400.0[µm]
1000
39
19968
=
1587.5
m] .... and set the following values
4 − 4
∆
I=0.0001[mm]
) is "1".
M
)
P
as the numerator and A
P
Motor
Amplifier
)
P
) unit magnification (A
L
M
m]
A
P
A
A
L
M
is 1 to 65535 [PLS] and that of A
P
× A
L
M
M
)
L
Hide quick links:
Advertisement
Table of Contents
