INVT DA180-S2R8SG0

DA180 series basic AC servo drive Function codes
-87-
P0.25
Numerator of
electronic gear ratio
1
Setting range
Default
Unit
Applicable
mode
0–(2
31
-1)
0
-
P
P0.26
Denominator of
electronic gear ratio
Setting range
Default
Unit
Applicable
mode
1–(2
31
-1)
10000
-
P
P0.27
Numerator of
electronic gear ratio
2
Setting range
Default
Unit
Applicable
mode
0–(2
31
-1)
0
-
P
P0.28
Numerator of
electronic gear ratio
3
Setting range
Default
Unit
Applicable
mode
0–(2
31
-1)
0
-
P
P0.29
Numerator of
electronic gear ratio
4
Setting range
Default
Unit
Applicable
mode
0–(2
31
-1)
0
-
P
Electronic gear ratio concept: For any pulse input, the quantity and frequency of pulse actually
received by the drive can be changed by multiplying a certain coefficient. This coefficient is
electronic gear ratio. It can be divided into two parts: numerator and denominator:
Electronic gear ratio = g1/ g2
Of which,
g1: indicates the numerator of the electronic gear ratio
g2: indicates the denominator of the electronic gear ratio;
The following is the schematic diagram for the electronic gear ratio:
Deviation
counter
Motor
Encoder
Intermediate
link
Electronic
gear ratio
Input pulse train
Feedback pulse
Example: The following is an example where 1 pulse is
equivalent to a feed rate of 10μm:
Mechanical specifications:
Feed of the ball screw Pb =10mm
DEC ratio n=3/5
Resolution of the servo motor encoder =10000
The electronic gear ratio is as follows:
3
00
1 10000 50
10 10
2 (3 5) 10 3
g Pt Pt
g S n Pb

  ·   ·   · 
  
󰳞󱬆󰴋
n
Servo
motor