How To Set The Electronic Gear; Electronic Gear Setting For The Profile Mode - Mitsubishi Electric MELSERVO-JE Instruction Manual

4. PARAMETERS
4.3 Software limit
The limit stop with the software limit ([Pr. PT15] to [Pr. PT18]) is the same as the motion of the stroke end.
Exceeding a setting range will stop and servo-lock the shaft. This will be enabled at power-on and will be
disabled in the profile velocity mode, profile torque mode, and homing mode. Setting a same value to
"Software limit +" and "Software limit -" will disable this function. Setting a larger value to "Software limit -"
than "Software limit +" will disable this function.

4.4 How to set the electronic gear

4.4.1 Electronic gear setting for the profile mode

(1) Setting [pulse] with "Position data unit" of [Pr. PT01]
Adjust [Pr. PA06] and [Pr. PA07] to match the servo amplifier setting with the travel distance of the
machine.
The following setting example explains how to calculate the electronic gear.
Inhibited range
Travel
impossible
Current position
Electronic gear
([Pr. PA06]/[Pr. PA07])
Travel distance
P : Servo motor encoder resolution: 131072 [pulse/rev]
t
ΔS: Travel distance per servo motor revolution [pulse/rev]
CMX/CDV = P
POINT
To calculate the electronic gear, the following specification symbols are
required.
Pb: Ball screw lead [mm]
1/n: Reduction ratio
P : Servo motor encoder resolution [pulse/rev]
t
ΔS: Travel distance per servo motor revolution [mm/rev]
Movable range
Travel possible
Software limit
+
CMX
Deviation counter
CDV
-
/ΔS
t
4 - 30
Servo motor
M
Encoder