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Electronic Gear Ratio setting examples
Transmission System Setting Process
Ball Screw
Pulse Value of 1 Rotating for
Encoder=2000pulse/rev
Distance of 1 Rotating for Ball
Screw = 5mm
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:
5000
8000
/1/5
4/2000
RationGear Electronic =
÷
×
=
pulseumrevmm
revpulse
4. Set the parameter of Electronic Gear Ratio:
Numerator of Electronic Gear Ratio = 8000
Denominator of Electronic Gear Ratio = 5000
Mechanical Disc
Load Shaft
Deceleration Ratio-1/5
Servo Motor
Pulse Value of Rotating for Encoder
= 2500pulse/rev
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:
3600
50000
1
5
/1.0360
4/2500
RatioGear Electronic =×
°÷°
×
=
pulse
revpulse
4. Set the parameter of Electronic Gear Ratio:
Numerator of Electronic Gear Ratio = 50000
Denominator of Electronic Gear Ratio =3600
Transmission Belt
1. Main positioning specifications:
a) Deceleration Ratio=1/8
b) Load Shaft ( Idler)
Move Value per revolution.
mm314mm1003.14
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:
31400
262144
1
8
/10314
4/8192
RatioGear Electronic =×
÷
×
=
pulseummm
revpulse
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
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