Mitsubishi Electronics E68 ユーザーズマニュアル

II - 165 

 

2215 SV015 

FFC 

Acceleration 
rate feed 
forward gain 

When a relative error in the synchronous control is 
large, apply this parameter to the axis that is 
delaying.  The standard setting value is "0".  For the 
SHG control, set to "100". 
To adjust a relative error in 
acceleration/deceleration, increase the value by 50 
to 100 at a time. 

0 to 999 
(%) 

Set this when the protrusion (that occurs due to the 
non-sensitive band by friction, torsion, backlash, etc) 
at quadrant change is too large. 
This compensates the torque at quadrant change. 
This is valid only when the lost motion compensation 
(SV027 (SSF1/lmc)) is selected. 

 

Type 1: When SV027 (SSF1)/ bit9, 8 (lmc)=01 
Set the compensation amount based on the motor 
torque before the quadrant change. 
The standard setting is "100".  Setting to "0" means 
the compensation amount is zero. 
Normally, use Type 2. 

-1 to 200 
(%) 

Type 2: When SV027 (SSF1)/ bit9, 8 (lmc)=10 
Set the compensation amount based on the stall 
(rated) current of the motor. 
The standard setting is double of the friction torque.  
Setting to "0" means the compensation amount is 
zero. 

-1 to 100 
(Stall [rated] 
current %) 

2216 SV016 

LMC1 

Lost motion 
compensation 
1 

When you wish different compensation amount 
depending on the direction 
When SV041 (LMC2) is "0", compensate with the 
value of SV016 (LMC1) in both of the + and 
-directions. 
If you wish to change the compensation amount 
depending on the command direction, set this and 
SV041 (LMC2).  (SV016: + direction, SV041: - 
direction.  However, the directions may be opposite 
depending on other settings.) 
When "-1" is set, the compensation won’t be 
performed in the direction of the command.