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7.5.3  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 

A 

X: SV041

X: SV016

B 

Y: SV016

Y: SV041

C 

X: SV016

X: SV041

D 

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

C 

D

(Note) The setting value for the parameter is "0" or "-1", the compensation amount is determined as 

shown below. 

0 

0 

No compensation 

No compensation 

n 0 

n 

n 

0 m 

m 

m 

n m 

n 

m 

n -1 

n No 

compensation 

-1 m 

No 

compensation m