Electronic Gear Function [G] [Wg]; Setting Method - Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual

3.9

Electronic gear function [G] [WG]

Electronic gear function is a function that multiplies the electronic gear ratio to the position command, and sets the ratio of the
rotation amount/travel distance of the servo motor to the rotation amount/travel distance of the command unit as desired. For
the position feedback, the inverse number of the electronic gear ratio is multiplied.
Position command
Electronic gear
[Command unit]
Position feedback
Electronic gear
reverse conversion
[Command unit]
• Set the electronic gear within the range of conditions. If a value out of the range is set, [AL. 037 Parameter
error] occurs.
Precautions
• To prevent unexpected operation, set the electronic gear correctly.
• If an excessive command pulse frequency is inputted from the controller in the cyclic synchronous position mode, [AL. 031
Overspeed] or [AL. 035 Command frequency error] may occur, depending on the value of the electronic gear ratio.

Setting method

Setting with servo parameters
Servo Symbol
parameter
PA06 CMX
PA07 CDV
Setting with object dictionary
Set the electronic gear numerator for [Motor revolutions (Obj. 6091h: 01h)], and electronic gear denominator for [Shaft
revolutions (Obj. 6091h: 02h)].
For details on the objects, refer to the User's Manual (Object Dictionary).
Index Sub Object
6091h 0 ARRAY
1
2
+
Deviation counter
conversion
-
Name
Electronic gear - Numerator
Electronic gear - Denominator
Name
Gear ratio
Motor revolutions
Shaft revolutions
Servo motor
M
Encoder
Outline
Set the electronic gear numerator.
Initial value: 1
Set the electronic gear denominator.
Initial value: 1
Description
Gear ratio
Number of revolutions of the servo motor shaft (numerator)
This corresponds to [Pr. PA06].
Number of revolutions of the drive shaft (denominator)
This corresponds to [Pr. PA07].
3.9 Electronic gear function [G] [WG]
3 BASIC FUNCTION
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