
B-63945EN/02 9.DIGITAL SERVO
- 511 -
Setting for use of a separate detector (full-closed)
F⋅FG numerator (≤ 32767)
Number of position pulses
corresponding to a
predetermined amount of travel
F⋅FG denominator (≤ 32767)
=
Number of position pulses
corresponding to a
predetermined amount of travel
from a separate detector
(as
irreducible
fraction)
[Example]
To detect a distance of 1 µm using a 0.5 µm scale, set the
following:
Numerator of F⋅FG
L/1 1
Denominator of F⋅FG
=
L/0.5
=
2
<<Examples of calculation>>
1/1000 mm 1/10000 mm
One
revolution of
motor
8 mm
10 mm
12 mm
n = 1/m = 125
n = 1/m = 100
n = 3/m = 250
n = 2/m = 25
n = 1/m = 10
n = 3/m = 25
(7) Direction of travel
2022 Rotational direction of motor
111 : Normal (clockwise) -111 : Reverse (counterclockwise)
Number of speed pulses, Number of position pulses
Closed loop
Semi-closed
loop
Parallel type
Serial linear
scale
Serial rotary scale
Command unit (µm) 1/0.1 1/0.1 1/0.1 1/0.1
Initial bit setting b0=0 b0=0 b0=0 b0=0
Number of speed pulses
8192 8192 8192 8192
Number of position pulses
12500(*1) (*2 - Example 1) (*2 - Example 1) (*2 - Example 2)
Set 8192 as the number of speed pulses. For the linear motor, make
settings according to "Linear Motor Parameter Setting" in the αi series
parameter manual.