Limitations To Electronic Gear Setting Value - Mitsubishi MELDAS MDS-C1 Instruction Manual

3-3-2 Limitations to electronic gear setting value

The servo drive unit 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
M60S/E60 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.
(1) For semi-closed loop control
Reduced fraction of
When the above is calculated, the following conditions must be satisfied.
ELG1 ≤ 32767
ELG2 ≤ 32767
(2) For full-closed loop control
Reduced fraction of
When the above is calculated, the following conditions must be satisfied.
PGNX ≤ 32767
PGNY ≤ 32767
And,
Reduced fraction of
When the above is calculated, the following conditions must be satisfied.
PGNXsp ≤ 32767
PGNYsp ≤ 32767
POINT
PC2 × RNG1
ELG1
=
PC1 × PIT × IUNIT
ELG2
IUNIT = 2/NC (µm) command unit
1µm : IUNIT = 2, 0.1µm : IUNIT = 20
PC2 × RNG2 × PGN1
PGNX
=
PC1 × RNG1 × 30
PGNY
PC2 × RNG2 × PGN1sp
PGNXsp
=
PC1 × RNG1 × 30
PGNYsp
If the electronic gears overflow, the alarm 37 or error parameter No. 101 (2301
with M60S/E60 series NC) will be output.
3. Setup
(reduced fraction)
(reduced fraction)
(reduced fraction)
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