Electronic Gear Ratio Settings - YASKAWA SGD7S-****20A Series Product Manual

5.15.1

Electronic Gear Ratio Settings

Set the electronic gear ratio using Pn20E and Pn210.
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.
Important
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.
Electronic Gear Ratio (Numerator)
Pn20E Setting Range
1 to 1,073,741,824
Electronic Gear Ratio (Denominator)
Pn210 Setting Range
1 to 1,073,741,824
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:
Electronic gear ratio
Setting Unit
1
Setting Unit
1
B
Pn20E
= =
A
Pn210 Travel di tance per load haft revolution (reference unit )

5.15.1 Electronic Gear Ratio Settings

Default Setting
16
Default Setting
1
Encoder re olution
5.15 Electronic Gear Settings
Position
When Enabled Classification
After restart Setup
Position
When Enabled Classification
After restart Setup
m
×
n
5
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