Estun pronet series, Руководство пользователя

Страница: 99 / 193

ProNet Series AC Servo User's Manual
- 97 -
（
2
）
Related Parameters
Pn201
Electronic Gear Ratio (Numerator)
Setting Range Setting Unit Factory Setting Setting Validation
1
～
65535 — 1 After restart
Pn202
Electronic Gear Ratio (Denominator)
Setting Range Setting Unit Factory Setting Setting Validation
1
～
65535 — 1 After restart
The deceleration ratio of the servomotor and the load shaft is given as n/m where m is the
rotation of the servomotor and n is the rotation of the load shaft.
Electronic gear ratio:
202
201
Pn
Pn
A
B
=
n
m
units reference revolution shaft
load per ce dis Travel
pulses encoder of No
×
×
=
) (
tan
4 .
·
If the ratio is outside the setting range, reduce the fraction (both numerator and denominator) until you obtain integers
within the range.
·
Be careful not to change the electronic gear ratio (B/A).
■ Important
· Electronic gear ratio setting range: 0.01 ≤ electronic gear ratio(B/A) ≤ 100
· If the electronic gear ratio is outside this range, the servo drive will not operate properly. In this case, modify the load
configuration or reference unit.
(3)Procedure for Setting the Electronic Gear Ratio
Use the following procedure to set the electronic gear ratio.
Step Operation Description
1
Check machine specifications.
Check the deceleration ratio, ball screw pitch and pulley
diameter.
2
Check the number of encoder
pulses.
Check the number of encoder pulses for the servomotor used.
3
Determine the reference unit used.
Determine the reference unit from the host controller,
considering the machine specifications and positioning
accuracy.
4
Calculate the travel distance per load shaft
revolution. Calculate the number of reference units necessary to turn the load shaft
one revolution based on the previously determined reference units.s
5
Calculate the electronic gear ratio. Use the electronic gear ratio equation to calculate the ratio (B/A).
6
Set parameters. Set parameters using the calculated values.
Position
Position