Mitsubishi Electronics C64T ユーザーズマニュアル

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7.  Servo Parameters  
7.4  Supplement 
 
173 
7.4.3  Lost Motion Compensation 
When the motor is to rotate in the clockwise direction (looking from the load side) at the command for 
the + direction, the command direction is CW. Conversely, when the motor is to rotate in the 
counterclockwise direction, the command direction is CCW. 
This rotation direction can be set with the CNC machine parameters. Note that the meaning of the ± will 
differ for some servo parameters according to this motor rotation direction. The servo parameters 
affected by CW/CCW are shown below. 
  SV016 (LMC1), SV041 (LMC2) 
(When different values are set for SV016 and SV041) 
  SV031 (OVS1), SV042 (OVS2) 
(When different values are set for SV031 and SV042) 
 
<Example>  If the lost motion compensation amount is to be changed according to the direction, 
the compensation amount at the quadrant changeover point of each arc where the 
lost motion compensation is applied will be as shown below according to the 
command polarity. 
 CW 
CCW 
X: SV041
X: SV016
Y: SV016
Y: SV041
X: SV016
X: SV041
Y: SV041
Y: SV016
 
+X
-X 
-Y
+Y
The Y axis command 
direction changes from 
the – to + direction. 
The X axis command 
direction changes from 
the – to + direction. 
The X axis command 
direction changes from 
the + to – direction. 
The Y axis command 
direction changes from 
the + to – direction. 
A
B
D
 
(Note) The setting value for the parameter is “0” or “-1”, the compensation amount is determined as 
shown below. 
Setting value 
for SV016 
(Setting value 
for SV031) 
Setting value 
for SV041 
(Setting value 
for SV041) 
Compensation 
amount  
in + direction 
Compensation 
amount 
in - direction 
No compensation 
No compensation 
n 0 
0 m 
n m 
n -1 
n No 
compensation 
-1 m 
No 
compensation m