Electronic Gear Ratio Settings - YASKAWA SGD7S Product Manual

5.15 Electronic Gear Settings

5.15.1 Electronic Gear Ratio Settings

5.15.1 Electronic Gear Ratio Settings

Set the electronic gear ratio using Pn20E and Pn210.
Important
Pn20E
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:
Electronic gear ratio
 Encoder Resolution
You can check the encoder resolution in the Servomotor model number.
SGM7J, SGM7A,
SGM7P, SGM7G,
5-42
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 connected motor.)
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, or
SGM7G motor.)
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)
Setting Range Setting Unit
1 to 1,073,741,824
Electronic Gear Ratio (Denominator)
Setting Range Setting Unit
1 to 1,073,741,824
B Pn20E
= =
A
Pn210 Travel distance per load shaft revolution (reference units)
SGM7F -
SGMCS -
SGMCV -
Default Setting
1 16
Default Setting
1 1
Encoder resolution
Specification
Code
24-bit multiturn absolute encoder
7
24-bit incremental encoder
F
Code Specification
20-bit single-turn absolute encoder
3
20-bit incremental encoder
D
Specification
Code
22-bit single-turn absolute encoder
E
22-bit multiturn absolute encoder
I
Position
When Enabled Classification
After restart Setup
Position
When Enabled Classification
After restart Setup
m
×
n
Encoder Resolution
16,777,216
16,777,216
Encoder Resolution
1,048,576
1,048,576
Encoder Resolution
4,194,304
4,194,304