How To Set The Electronic Gear; Electronic Gear Settings In The Point Table Method And Program Method - Mitsubishi Electric MELSERVO-J4 Instruction Manual

7. PARAMETERS

7.3 How to set the electronic gear

7.3.1 Electronic gear settings in the point table method and program method

(1) Setting [mm], [inch], or [pulse] with "Position data unit" of [Pr. PT01].
Adjust [Pr. PA06] and [Pr. PA07] so that the servo motor setting matches with the travel distance of the
machine.
Travel distance
Set the electronic gear within the following range. Setting out of the range will trigger [AL. 37 Parameter error].
(2) Setting [degree] with "Position data unit" of [Pr. PT01].
Set the number of gear teeth on machine side to [Pr. PA06] and number of gear teeth on servo motor side
to [Pr. PA07].
Travel distance
Pt: Servo motor encoder resolution: 4194304 [pulse/rev]
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.
Electronic gear selection
(x _ _ _ ) ([Pr. PA21])
"0" (initial value)
"2"
"3"
Pt: Servo motor encoder resolution: 4194304 [pulse/rev]
ΔS: Travel distance per servo motor revolution [mm/rev]/[inch/rev]/[pulse/rev]
CMX/CDV = Pt/ΔS
Pr. PA21
0 _ _ _
2 _ _ _
3 _ _ _
Electronic gear selection
(x _ _ _ ) ([Pr. PA21])
"0" (initial value)
"2"
X16
"3"
X32
Electronic gear
([Pr. PA06] [Pr. PA07])
CMX
CDV
CMX
X16
CDV
CMX
X32
CDV
Electronic gear setting range
1/865 < CMX/CDV < 271471
1/13825 < CMX/CDV < 16967
1/27649 < CMX/CDV < 8484
Electronic gear
([Pr. PA06] [Pr. PA07])
CMX
CDV
CMX Pt
CDV 360000
CMX
CDV
7 - 77
Servo motor
+
Deviation counter
-
Encoder
Servo motor
+
Deviation counter
-
Encoder
M
M