Mitsubishi Electric MELSERVO-J5 User Manual page 138
Ac servo system
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Also See for MELSERVO-J5:
- User manual (478 pages) ,
- Sample screen manual (128 pages) ,
- Introduction manual (112 pages)
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Ex.
Setting example for conveyors
Machine specifications
r = 160 [mm]
1/n
Z
Z
2
1/n = Z
/Z
= 1/3
1
2
Pulley diameter: r = 160 [mm]
Reduction ratio: 1/n = Z
Z
: Number of gear teeth on servo motor side
1
Z
: Number of gear teeth on load gear
2
Servo motor encoder resolution: P
CMX
P
P
t
t
=
=
CDV
ΔS
1/n • r • π • α
Reduce CMX and CDV to the setting range or less and round off each value to the nearest whole number.
Therefore, set CMX = 524288 and CDV = 1309.
*1 When the command unit is "pulse", convert as α = 1.
■When setting "2" (degree) in [Pr. PT01.2 Unit for position data]
Set the number of gear teeth on machine side with [Pr. PA06 Electronic gear numerator] and the number of gear teeth on
servo motor side with [Pr. PA07 Electronic gear denominator]. [Motor revolutions (Obj. 6091h: 01h)] and [Shaft revolutions
(Obj. 6091h: 02h)] can also be used for the setting.
Electronic gear
([Pr. PA06]/[Pr. PA07])
([Obj. 6091h: 01h]/[Obj. 6091h: 02h])
Travel distance
[command unit]
P
: Servo motor encoder resolution [pulse/rev]
t
CMX: Number of gear teeth on machine side
CDV: Number of gear teeth on servo motor side
Ex.
If the number of gear teeth on machine side is 25 and the number of gear teeth on servo motor side is 11, set [Pr. PA06] to 25
and [Pr. PA07] to 11.
Z
Servo motor
2
Z
1
P
(servo motor resolution): 67108864 pulses/rev
t
Z
: Number of gear teeth on servo motor side
1
Z
: Number of gear teeth on machine side
2
Z
: Z
= 11: 25
1
2
3 BASIC FUNCTION
136
3.10 Electronic gear function [G]
Servo motor encoder resolution
67108864 [pulse/rev]
1
/Z
= 1/3
1
2
= 67108864 [pulse/rev]
t
67108864
67108864
=
=
*1
1/3 • 160 • π • 1000
167551.61
or
+
CMX
Pt
CDV
360000
-
Machine
524288
≈
1309
Servo motor
Deviation counter
M
Encoder
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