6 Parameter Setting and Functions
6.3.2 Electronic Gear Function
6-20
5. Electronic gear ratio is given as
.
If the decelerator ratio of the motor and the load shaft is given as
where m is the rotation of the motor and n is the rotation of the load shaft,
Make sure the electronic gear ratio satisfies the following condition:
The SERVOPACK will not work properly if the electronic gear ratio is outside this range. In this case,
modify the load configuration or reference unit.
6. Set the parameters.
Set the electronic gear ratio according to machine specifications.
• B = [(Number of encoder pulses)
×
4]
×
[motor speed]
• A = [Reference units (travel distance per load shaft revolution)]
×
[load shaft revolu-
tion speed]
Reduce the electronic gear ratio
to the lower terms so that both A and B are integers
smaller than 65535, then set A and B in the respective parameters.
That is all that is required to set the electronic gear ratio.
Pn202
Electronic Gear Ratio
(Numerator)
Unit:
None
Setting
Range:
1 to 65535
Factory
Setting:
4
Position Control
Pn203
Electronic Gear Ratio
(Denominator)
Unit:
None
Setting
Range:
1 to 65535
Factory
Setting:
1
Position Control
B
A
----
n
m
----
Electronic gear ratio
B
A
=
No. of encoder pulses
×
4
Travel distance per load shaft revolution (reference unit)
×
m
n
IMPORTANT
0.01
≤
Electronic gear ratio B
A
100
≤
M
Reference
input
SGDH SERVOPACK with NS115
SGM
H servomotor
Electronic
gear
B
A
Electronic gear ratio B
A
= Pn202
Pn203
B
A
----
B
A
Pn202
Pn203
Electronic Gear
Ratio (Numerator)
Electronic Gear
Ratio (Denominator)
