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5 Servo Adjustment
MITSUBISHI CNC
< OMR-FF function adjustment items >
Enable OMR-FF function after performing the adjustment items in < Initial implementation > and adjust the
following parameters.
< Setting method >
(1) Disable SHG control.
Set #2204 : SV004(PGN2) to "0"
Set #2257 : SV057(SHGC) to "0"
Set #2208 : SV008(VIA) to "1364"
(2) Enable OMR-FF function.
#2139 : omrff_off = "0"
#2213 : SV113(SSF8)/bit0(omrffon) = "1"
(3) Set the OMR-FF function related parameters.
Set #2301 : SV101(TMA1) to the standard setting, "33".
Set #2302 : SV102(TMA2) to "88"
Set #2306 : SV106(PGM) to the same value as SV003.
Set #2312 : SV112(IFF) to "10000"
(4) Set the following parameter with overshooting, machine vibration and current value in cutting feed and
rapid traverse.
< Adjustment parameter >
#2306 : SV106(PGM)
(5) Set the following parameters with the roundness measurement.
< Adjustment parameters >
#2304 : SV104(FFR0)
#2305 : SV105(FFR1)
#2306 : SV106(PGM)
(6) Set the following parameters with the corner accuracy test.
< Adjustment parameters >
#2304 : SV104(FFR0)
#2305 : SV105(FFR1)
#2306 : SV106(PGM)
CAUTION
1. After the above adjustment, set SV106 in the interpolation axes to the same value as the axis with the lowest SV106
value.
2. Perform the above confirmation of accuracy in G61.1(G8P1)(high-accuracy) mode; use the constant and filter for high-
accuracy mode with OMR-FF function. Note that only #2010: fwd-g (Feed forward gain) will be disabled.
3. When the setting value for SV105 increases, ∆R will decrease, however, overshooting or machine vibration tend to occur
during acceleration/deceleration.
-> Check the acceleration/deceleration waveforms again after setting SV105.
4. Feed forward gain (#2010 : fwd_g) on NC side will be disabled while this function is enabled
(#2139:omrff_off = "0").
5. The following functions will be disabled when using this function.
- Machine side compensation function
- Acceleration rate feed forward function
- Overshoot compensation function