Inovance SV820N Series - Conversion Factor Setting

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6 Trial Running
6
6.9 Conversion Factor Setting
Note
● For encoders with 20-bit resolution, the default value of the SV820N gear ratio 6091-
01/6091-02is1:1.
● For encoders with 23-bit resolution, the default value of the SV820N gear ratio 6091-
01/6091-02is8:1.
6091h:Gearratio
The gear ratio indicates the motor displacement (in encoder unit) is corresponding to the load shaft displace-
ment of 1 reference unit.
Thegearratioisdenedbythenumerator6091-01handdenominator6091-02h.Itdeterminestherelation-
shipbetweentheloadshaftdisplacement(inreferenceunit)andthemotordisplacement(inencoderunit):
Motor displacement = Load shaft displacement x Gear ratio
The motor is connected with the load through the reduction wheel and other mechanical transmission mech-
anism. The gear ratio is calculated based on parameters such as the mechanical reduction ratio, mechanical
sizeandmotorresolutions:Itcanbecalculatedasfollows:
Motor resolution
Load shaft resolution
Gear ratio=
Index
6091h
Name Gear Ratio
Setting &
Effective
-
Data
Structure
ARR
Data
Format
Uint32
Access - Mapping Energy
Relevant
Mode
ALL
Data
Range
OD Data
Range
Default
OD Default
Value
It sets the relationship between the number of motor shaft revolutions and the number of load shaft revolutions.
Theelectronicgearratiomustbewithinthefollowingrange:
(0.001 x encoder resolution/10,000, 4,000 x encoder resolution/10,000)
If this range is exceeded, Er.B03 (electronic gear ratio exceeding limit) will be detected.
Themotorpositionfeedback(encoderunit)andloadshaftpositionfeedback(referenceunit)isinthefollowing
relationship:
Motorpositionfeedback=loadshaftpositionfeedbackxgearratio
Themotorspeed(RPM)andtheloadshaftspeed(referenceunit/s)isinthefollowingrelationship:
Load shaft speed × Gear ratio 6091h
Encoder resolution
Motor speed (rpm) =
× 60
The motor acceleration rate (RPM/ms) and the load shaft speed (reference unit/s
2
)isinthefollowingrelationship:
Load shaft acceleration rate × Gear ratio 6091h
Encoder resolution
Motor acceleration rate =
1,000
60
×