Setting The Initial Parameters; Servo Specification Parameters; Limitations To Electronic Gear Setting Value - Mitsubishi MELDAS HS Series Specifications And Instruction Manual

7-1 Setting the initial parameters

The servo parameters must be set to start up the servo drive system.
The servo parameters are input from the CNC. The input method will differ according to the CNC, so
refer to the Instruction Manual provided with each CNC.

7-1-1 Servo specification parameters

The servo specification parameters are determined according to the machine specifications and servo
system specifications.
No. Abbrev. Parameter name
SV017 SPEC Servo specifications
SV025 MTYP Motor type
SV036 PTYP Regenerative resistor type
SV027 SSF1 Special servo function
selection 1
SV033 SSF2 Special servo function
selection 2
SV001 PC1 Motor side gear ratio
SV002 PC2 Machine side gear ratio
SV018 PIT Ball screw pitch
SV019 RNG1 Position detector resolution
SV020 RNG2 Speed detector resolution
SV003 PGN1 Position loop gain

7-1-2 Limitations to electronic gear setting value

The servo amplifier has internal electronic gears. The command value from the NC is converted into
a detector resolution unit to carry out position control. The electronic gears are single gear ratios
calculated from multiple parameters as shown below. However, each value (ELG1, ELG2) must be
less than 32767.
If the value overflows, the initial parameter error (alarm 37) or error parameter No. 101 (2301 with
M50/M64 Series NC) will be output.
If an alarm occurs, the mechanical specifications and electrical specifications must be revised so that
the electronic gears are within the specifications range.
Reduced fraction of
ELG1
=
PC1 × PIT × IUNIT
ELG2
When the above is calculated, the following conditions must be satisfied.
ELG1 ≤ 32767
ELG2 ≤ 32767
POINT
Chapter 7 Setup
This is a HEX setting parameter. Set this as follows according to the servo
specifications.
15 14
bit
0 dmk
7 abs Incremental control
Set all bits other than those above to 0.
Set the motor type.
Refer to the standard parameter list for each motor for the settings.
Set 1000 as a standard.
Set 4000 as a standard.
Set 0000 as a standard.
Set the motor side gear ratio in PC1 and the machine side gear ratio in PC2.
When using a rotary axis, set the total deceleration (acceleration) ratio.
Set the ball screw pitch with an mm unit. Set 360 for a rotary axis.
Set the motor detector resolution with a kp/rev unit for both settings.
Refer to the standard parameters for each motor for the settings.
Set 33 as a standard.
PC2 × RANG
(reduced fraction)
RANG = RNG1 = RNG2
IUNIT = 2/NC command unit (µm)
If the electronic gears in the amplifier overflow, the alarm 37 or error
parameter No. 101 (2301 with M50/M64 series NC) will be output.
Explanation
13 12 11 10 9 8
Meaning when "0" is set.
Deceleration control stop
(Standard)
1µm : IUNIT = 2, 0.1µm: IUNIT = 20
7–2
7 6 5 4 3 2
abs
Meaning when "1" is set.
Dynamic brake stop selection
Absolute position control
1 0
dmk