Mitsubishi Electric MELSERVO-JE Instruction Manual page 55

4. PARAMETERS
(2) Setting [degree] with "Position data unit" of [Pr. PT01].
Set the number of gear teeth on machine side to [Pr. PA06] and the number of gear teeth on servo
motor side to [Pr. PA07].
Set the electronic gear within the following range. Setting out of the range will trigger [AL. 37 Parameter
error].
(a) Set values to make numerator and denominator 16384 or lower if the electronic gear (CMX/CDV) is
reduced to its lowest terms.
(b) Set values to make numerator and denominator 16777216 or lower if (CMX × Pt)/(CDV × 360000) is
reduced to its lowest terms.
The following shows a setting example of the electronic gear.
Number of gear teeth on machine side: 25, number of gear teeth on servo motor side: 11
Set [Pr. PA06] = 25 and [Pr. PA07] = 11.
Electronic gear
([Pr. PA06]/[Pr. PA07])
CMX
Travel distance
CDV
P : Servo motor encoder resolution: 131072 [pulse/rev]
t
Machine
Servo motor
Z2
Z1
P : (servo motor resolution): 131072 pulses/rev
t
Z1: Number of gear teeth on servo motor side
Z2: Number of gear teeth on machine side
Z1: Z2 = 11:25
4 - 32
P +
t
Deviation counter
-
360000
Servo motor
M
Encoder