SMC Networks LECSB2-T Series User Manual

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16. POSITIONING MODE
Servo motor encoder resolution Pt = 4194304 [pulse/rev]
Note.
Because the command unit is "mm", α = 1000 is set. When the unit is "inch", convert the setting into α = 10000. When
the unit is "pulse", convert the setting into α = 1.
Therefore, set CMX = 524288 and CDV = 625.
(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 gear
Servo motor encoder resolution Pt = 4194304 [pulse/rev]
Note.
Because the command unit is "mm", α = 1000 is set. When the unit is "inch", convert the setting into α = 10000. When
the unit is "pulse", convert the setting into α = 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) 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].
P
t
: Servo motor encoder resolution: 4194304 [pulse/rev]
CMX
CDV
Pt
=
ΔS
Pt
=
n Pb α (Note)
4194304
=
1/2 10 1000
4194304
=
5000
524288
=
625
Servo motor encoder resolution
4194304 [pulse/rev]
Z1Z2
1/n = Z1/Z2 = 1/3
1/n
r = 160 [mm]
CMX
CDV
Pt
=
ΔS
Pt
=
n r π α (Note)
4194304
=
1/3 160 π 1000
4194304
=
167551.61
524288
20944
CDV
Travel distance
"0" (initial value)
CMX
CDV
CMX
Deviation counter
+
-
Electronic gear
([Pr. PA06]/[Pr. PA07])
Servo motor
Encoder
M
X32
X16
"2"
CDV
CMX"3"
Electronic gear selection
(x _ _ _ ) ([Pr. PA21]) (Note)
360000
P
t

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English