IS810N-INT Series Servo System User Manual (Brief) Chapter 6 Commissioning Software
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6.1.7 Conversion Factor Setting
Note:
For encoders with 20-bit resolution, the default value of the IS810N gear ratio 6091-01/6091-
02 is 1:1.
For encoders with 23-bit resolution, the default value of the IS810N gear ratio 6091-01/6091-
02 is 8:1.
6091h: Gear ratio
The gear ratio indicates the motor displacement (in encoder unit) corresponding to the driving
shaft displacement by one reference unit.
The gear ratio is dened by the numerator 6091-01h and denominator 6091-02h. It determines
the relationship between the driving shaft displacement (in reference unit) and the motor
displacement (in encoder unit):
Motor displacement = Driving shaft displacement x Gear ratio
The motor is connected with the load through the reduction wheel and other mechanical
transmission mechanisms. The gear ratio is calculated based on parameters such as the
mechanical reduction ratio, mechanical size and motor resolutions. It can be calculated using
the following formula:
605Ah
Name
Fault reaction option
code
Setting &
Effective
Any setting
Effective upon
stop
Data
Structure
VAR
Data
Type
Uint16
Access - Mapping YES
Control
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/10000, 4000 x Encoder resolution/10000)
If this range is exceeded, Er.B03 will be detected.
The motor position feedback (encoder unit) and driving shaft position feedback (reference unit) is in the
following relationship:
Motor position feedback = Driving shaft position feedback x Gear ratio
u
The motor speed (RPM) and the driving shaft speed (reference unit/s) is in the following relationship:
u
The motor acceleration (RPM/ms) and the driving shaft acceleration (reference unit/s2) is in the
following relationship:
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