Mitsubishi MELDAS MDS-C1

3. Setup
3 - 5
3-2 Setting the initial parameters for the servo drive unit
(High-gain specifications)
The servo parameters must be set before the servo system can be started up. The servo parameters
are input from the NC. The input method differs according to the NC being used, so refer to each NC
Instruction Manual.
3-2-1 Setting the standard parameters
When starting up the system, first set the standard parameters listed in "3-2-3 List of standard
parameters for each servomotor". For the parameters shown below, check the machine and servo
system specifications and determine the setting value.
(1) Electronic gear related parameters
The setting range of the following parameters, which configure the electronic gears, may be limited
according to the combination. Refer to section "3-2-2 Limitations to electronic gear setting values"
for details.
High-gain specifications
No. Abbrev. Parameter name Explanation
Setting
range (Unit)
SV001 PC1*
Motor side gear
ratio
1 to 32767
SV002 PC2*
Machine side gear
ratio
Set the motor side and machine side gear ratio.
For the rotary axis, set the total deceleration (acceleration) ratio.
Even if the gear ratio is within the setting range, the electronic gears may
overflow and cause an alarm.
1 to 32767
SV018 PIT* Ball screw pitch Set the ball screw pitch. Set to "360" for the rotary axis.
1 to 32767
(mm/rev)
In the case of the semi-closed loop control
Set the same value as SV020 (RNG2). (Refer to the explanation of
SV020.)
1 to 9999
(kp/rev)
In the case of the full-closed loop control
Set the number of pulses per ball screw pitch.
Detector model name Resolution SV019 setting
OHE25K-ET, OHA25K-ET 100,000 (p/rev) 100
OSE104-ET,OSA104-ET 100,000 (p/rev) 100
OSE105-ET,OSA105-ET 1,000,000 (p/rev) 1000
RCN723 (Heidenhain) 8,000,000 (p/rev) 8000
Relative position detection
scale
Refer to specification
manual for each detector
PIT/Resolution
(
µm)
AT41 (Mitsutoyo) 1 (µm/p)
The same as
SV018 (PIT)
FME type, FLE type
(Futaba)
Refer to specification
manual for each detector
PIT/Resolution
(
µm)
MP type (Mitsubishi Heavy
Industries)
Refer to specification
manual for each detector
PIT/Resolution
(
µm)
AT342 (Mitsutoyo) 0.5 (µm/p)
Twice as big as
SV018 (PIT)
AT343 (Mitsutoyo) 0.05 (µm/p)
20 times as big as
SV018 (PIT)
LC191M (Heidenhain)
Refer to specification
manual for each detector.
PIT/Resolution
(
µm)
LC491M (Heidenhain)
Refer to specification
manual for each detector.
PIT/Resolution
(
µm)
SV019 RNG1*
Position detector
resolution
1 to 9999
(kp/pit)
Set the number of pulses per one revolution of the motor end detector.
Detector model name SV020 setting
OSE104, OSA104 100
OSE105, OSA105 1000
SV020 RNG2*
Speed detector
resolution
1 to 9999
(kp/rev)
Parameters with an asterisk * in the abbreviation, such as PC1*, are validated with the NC power turned ON again.