How To Set The Electronic Gear - Mitsubishi MR-JE-200A Instruction Manual

7. PARAMETERS

7.3 How to set the electronic gear

(1) Setting [mm], [inch], or [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.
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 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.
The number of gear teeth on machine side: 25, and the number of gear teeth on servo motor side:
11
Set [Pr. PA06] = 25 and [Pr. PA07] = 11.
Travel distance
Pt: Servo motor encoder revolution 131072 [pulse/rev]
ΔS: Travel distance per servo motor revolution [mm/rev]/[inch/rev]/[pulse/rev]
CMX/CDV = Pt/ΔS
Electronic gear setting range
1/865 < CMX/CDV < 271471
Electronic gear
([Pr. PA06]/[Pr. PA07])
CMX
Travel distance
CDV
Pt: Servo motor encoder encoder revolution 131072 [pulse/rev]
Machine
Servo motor
Z2
Z1
Pt (Servo motor resolution): 131072 pulses/rev
Z1: Number of gear teeth on servo motor side
Z2: Number of gear teeth on machine side
Z1: Z2 = 11:25
7 - 69
Electronic gear
([Pr. PA06]/[Pr. PA07])
+
CMX
Deviation counter
CDV -
+
Pt
Deviation counter
360000
-
Servo motor
M
Encoder
Servo motor
M
Encoder