5.14 Electronic Gear Settings
5.14.1 Electronic Gear Ratio Settings
5-42
5.14.1
Electronic Gear Ratio Settings
Set the electronic gear ratio using Pn20E and Pn210.
Calculating the Settings for the Electronic Gear Ratio
Rotary Servomotors
If the gear ratio between the Servomotor shaft and the load is given as n/m, where n is the
number of load rotations for m Servomotor shaft rotations, the settings for the electronic gear
ratio can be calculated as follows:
The setting range of the electronic gear depends on the setting of Pn040 = n.
X
(Encoder
Resolution Compatibility Selection).
•
Pn040 = n.
0
(Use the encoder resolution of the Servomotor.)
Set the electronic gear ratio within the following range.
0.001
≤
Electronic gear ratio (B/A)
≤
64,000
If the electronic gear ratio is outside of this range, an A.040 alarm (Parameter Setting Error) will
occur.
•
Pn040 = n.
1
(Use a resolution of 20 bits when connected to an SGM7J, SGM7A,
SGM7P, SGM7G, SGM7E, or SGM7F Servomotor.)
Set the electronic gear ratio within the following range.
0.001
≤
Electronic gear ratio (B/A)
≤
4,000
If the electronic gear ratio is outside of this range, an A.040 alarm (Parameter Setting Error) will
occur.
Pn20E
Electronic Gear Ratio (Numerator)
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
1 to 1,073,741,824
1
64
After restart
Setup
Pn210
Electronic Gear Ratio (Denominator)
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
1 to 1,073,741,824
1
1
After restart
Setup
Important
=
=
×
B
A
Pn20E
Pn210
m
n
Electronic gear ratio
Encoder resolution
Travel distance per load shaft revolution (reference units)