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3 BASIC FUNCTION
3.9 Electronic gear function [G] [WG]
For profile position mode
• When setting "3" (pulse) in [Pr. PT01.2 Unit for position data]
Adjust [Pr. PA06 Electronic gear numerator] and [Pr. PA07 Electronic gear denominator] so that the travel distance set in the
servo amplifier matches the travel distance on the machine. [Motor revolutions (Obj. 6091h: 01h)] and [Shaft revolutions (Obj.
6091h: 02h)] can also be used for the setting.
P
t
: Servo motor encoder resolution [pulse/rev]
Δ
S: Travel distance per servo motor revolution [command unit/rev]
CMX: Electronic gear - Numerator
CDV: Electronic gear - Denominator
CMX/CDV = P
t
/
Δ
S
The following setting example shows how to calculate the electronic gear.
To calculate the electronic gear, the following specification symbols are required.
Pb: Ball screw lead [mm]
1/n: Reduction ratio
P
t
: Servo motor encoder resolution [pulse/rev]
Δ
S: Travel distance per servo motor revolution [mm/rev]
+
-
M
CDV
CMX
([Pr. PA06]/[Pr. PA07])
([Obj. 6091h: 01h]/[Obj. 6091h: 02h])
Deviation counter
Servo motor
Encoder
Electronic gear
Travel distance
[command unit]
or