Mitsubishi Electric MR-J4-_GF, Instruction Manual

Page: 182 / 274

7. PARAMETERS
7 - 33
(b) Setting example of a conveyor
Machine specifications
Pulley diameter: r = 160 [mm]
Reduction ratio: 1/n = Z
1
/Z
2
= 1/3
Z
1
: Number of gear teeth on servo motor side
Z
2
: Number of gear teeth on load side
Servo motor encoder resolution
4194304 [pulse/rev]
Z
1
Z
2
1/n = Z
1
/Z
2
= 1/3
1/n
r = 160 [mm]
Servo motor encoder resolution: P
t
= 4194304 [pulse/rev]
CMX
CDV
P
t
=
Δ
S
P
t
=
n r
π α
(Note)
4194304
=
1/3 160
π
1000
4194304
=
167551.61
524288
20944
Note. Because the command unit is "mm", α is 1000. When the unit is "inch", α is 10000. When the unit is "pulse", α is 1.
Reduce CMX and CDV to within the setting range or lower, and round off each value to the closest
whole number.
Therefore, set CMX = 524288 and CDV = 20944.
(2) Electronic gear setting in the indexer method
Using [Pr. PA06] and [Pr. PA07], adjust the rotation amount "m" of the servo motor shaft which is
required to rotate the load side for "n" times. The following shows a setting example of the electronic
gear.
(a) Number of pulley teeth on machine side: 50, number of pulley teeth on servo motor side: 20
Set [Pr. PA06] = 50 and [Pr. PA07] = 20.
Number of pulley teeth
on machine side: 50
Servo motor
Number of pulley teeth
on servo motor side: 20
(b) Number of pulley teeth on machine side: 50, number of pulley teeth on servo motor side: 20, with
geared servo motor of 1/9
Set [Pr. PA06] = 450 and [Pr. PA07] = 20.
Number of pulley teeth
on machine side: 50
Number of pulley teeth
on servo motor side: 20
Servo motor
Reduction ratio of geared servo motor: 1/9
50
20
×
9
1
=
450
20