Mitsubishi MELDAS MDS-C1 Instruction Manual page 203

<Adjustment method>
1. Set the servo specifications (SV017: SPEC) bit1 to 1, and turn the NC power ON again.
2. Measure the position droop overshooting while increasing the dual feedback control time
constant (SV051: DFBT) in increments of 5ms. Adjust to the time constant where overshooting
does not occur.
3. For the final setting value, set a value 1.5 to 2-fold the value adjusted in 3.
No. Abbrev. Parameter name
SV017 SPEC* Servo specification
selection
Dual feedback
SV051 DFBT
control time constant
DFBN Dual feedback
SV052
control non-sensitive
band
4. Servo Adjustment
F E D C B
spm drvall drvup mpt
bit Meaning when "0" is set
1 dfbx Dual feedback control stop
Set the control time constant in dual feed back.
When "0" is set, the actual value that is set is 1ms.
The higher the time constant is, the closer it gets to the semi-closed
control, so the limit of the position loop gain is raised.
Set the non-sensitive band in the dual feedback control.
Set to "0" as a standard.
4 - 32
Explanation
A 9 8 7 6 5
mp abs vdir
Meaning when "1" is set
Dual feedback control start
Setting range
4 3 2 1 0
fdir vfb seqh dfbx fdir2
0 to 9999
(ms)
0 to 9999
( µ m)