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MDS-D-SVJ3/SPJ3 Series Instruction Manual
4-4 Characteristics improvement
【#2216】 SV016 LMC1 Lost motion compensation 1
Set this parameter when the protrusion (that occurs due to the non-sensitive band by friction, torsion,
backlash, etc.) at quadrant change is too large. This sets the compensation torque at quadrant
change (when an axis feed direction is reversed) by the proportion (%) to the stall torque. Whether to
enable the lost motion compensation and the method can be set with other parameters.
Type 2: When SV027 (SSF1)/bit9, 8 (lmc) = 10 (Compatible with obsolete type)
Set the type 2 method compensation torque. The standard setting is double the friction torque.
Type 3: When SV082(SSF5)/bit1= 1
Set the compensation torque equivalent of dynamic friction amount of the type 3 method
compensation amount. The standard setting is double the dynamic friction torque.
To vary compensation amount according to the direction.
When SV041 (LMC2) is "0", compensate with the value of SV016 (LMC1) in both +/-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 will not be performed in the direction of the command.
---Setting range---
-1 to 200 (Stall current %)
Note that when SV082/bit2 is "1", the setting range is between -1 and 20000 (Stall current
0.01%).
【#2241】 SV041 LMC2 Lost motion compensation 2
Set this with SV016 (LMC1) only when you wish to vary the lost motion compensation amount
depending on the command directions.
Normally, set to "0".
---Setting range---
-1 to 200 (Stall current %)
Note that when SV082/bit2 is "1", the setting range is between -1 and 20000 (Stall current
0.01%).
【#2282】 SV082 SSF5 Servo function 5
bit 2 : ccu Lost motion overshoot compensation compensation amount setting
increment
0: Stall current % 1: Stall current 0.01%
bit 1 : lmc3 Lost motion compensation type 3
Set this when protrusion at a quadrant change is too big.
0: Stop 1: Start
【#2285】 SV085 LMCk Lost motion compensation 3 spring constant
Set the machine system's spring constant when using lost motion compensation type 3.
When not using, set to "0".
---Setting range---
0 to 32767 (0.01%/μm)
1. As the acceleration of circular feed increases, the quadrant protrusion tends to get larger.
Therefore, the quadrant protrusion gets larger as the circular feedrate increases for the same
radius and as radius gets smaller for the same feedrate.
2. Torque offset (SV032) does not work for LMC compensation type 3.
3. Always set 0 to the lost motion compensation timing (SV039:LMCD).
POINT