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Electronic Gear Ratio setting examples
Transmission System
Pulse Value of 1 Rotating for
Encoder=2000pulse/rev
Load Shaft
Servo Motor
Ball Screw
Mechanical Disc
Distance of 1 Rotating for Ball
Screw = 5mm
Deceleration Ratio-1/5
Pulse Value of Rotating for Encoder
= 2500pulse/rev
Transmission Belt
Setting Process
1. Main positioning specifications:
a) Load Shaft(Ball Screw) pitch
move distance per revolution= 5mm
b) Motor Encoder ppr ( Pulse per revolution) =
2000pulses
2. Move distance per one pulse of move Command.
Moving Distance of 1 Pulse Command =1μm
3. Calculation of the Electronic Gear Ratio:
2000pulse
/ rev×
4 8000
Electronic Gear Ration =
=
5mm/
rev ÷ 1um/
pulse 5000
4. Set the parameter of Electronic Gear Ratio:
Numerator of Electronic Gear Ratio = 8000
Denominator of Electronic Gear Ratio = 5000
1. Main positioning specifications:
a) Deceleration Ratio=1/5
b) Load Shaft(Mechanical Disc)Move Value per one
revolution=360 ゚
Motor Encoder ppr ( Pulse per revolution)= 2500 pulses
2. Move distance per one pulse of move Command.
Distance for 1Pulse Command =0.1 ゚
3. Calculation of the Electronic Gear Ratio:
2500pulse
/ rev×
4 5 50000
Electronic Gear Ratio =
× =
360° ÷ 0.1°
/ pulse 1 3600
4. Set the parameter of Electronic Gear Ratio:
Numerator of Electronic Gear Ratio = 50000
Denominator of Electronic Gear Ratio =3600
1. Main positioning specifications:
a) Deceleration Ratio=1/8
b) Load Shaft ( Idler) Move Value per revolution.
= 3.14 × 100mm = 314mm
c) Motor encoder ppr ( Pulse Per Revolution) =
8192pulse
2. Move distance per pulse of move Command.
Distance for 1Pulse Command =10μm
3. Calculation the Electronic Gear Ratio:
8192 pulse / rev×
4 8 262144
Electronic Gear Ratio =
× =
314mm
÷ 10um/
pulse 1 31400
4. Set the parameter of Electronic Gear Ratio:
Reduction of the fraction to make the Numerator and
Denominator less than 50000.
Numerator of Electronic Gear Ratio
32768
Denominator of Electronic Gear Ratio
3925
5-40