LS ELECTRIC L7NHF Series, User Manual

Page: 189 / 409

9. Full-Closed Control
9-7
calculated as 2 mm / 4 um = 500 pulses.
Gear ratio setting
Number of external encoder pulses x (numerator / denominator) = Number of
motor encoder pulses
•
500(Number of external encoder pulses) ×
524288
(
Numerator
)
500
(
Denominator
)
= 524288(
Number of
motor encoder pulses
)
3. Belt-pulley
structure
- Motor-side pulley diameter: 30 mm
- Rotary-side pulley diameter: 20 mm
- External encoder resolution: 20000 pulse/rev
In the case of a gear and belt-pulley system, the final gear ratio is calculated and
the gear ratio is multiplied by the number of external encoder pulses to produce
the scale.
Motor encoder
specifications
524288[pulse/rev]
Load movement
amount/revolution
The external encoder rotates at a ratio of 30 / 20 per servo motor rotation. The
number of pulses for the external encoder is calculated as 20000 x (3/2) = 30000
pulses.
Gear ratio setting
Number of external encoder pulses x (numerator / denominator) = Number of
motor encoder pulses
•
30000(Number of external encoder pulses) ×
524288 ( Numerator )
30000 ( Denominator )
= 524288(
Number of
motor encoder pulses
)
F. Setting the load encoder position error level and initialization
0x2027 External Encoder Following Error Window ALL
Variable
Type
Setting Range Initial Value Unit
Accessi
bility
PDO
Assignm
ent
Variable
Attribute
Savin
g
UDINT 0 to 2147483647 100000 pulse RW No
Power
cycling
Yes