bnp-b2365(eng)b.pdf - 第151页

3. Setup 3 - 64 3-4-2 Restrictions on absolute position control When executing absolute positio n control, the followi ng conditions must be satisfied. If not satisfied, mechanical specifications and elect rical specific…

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3. Setup
3 - 63
3-4 Restrictions on servo control
There may be some restrictions on mechanical specifications and electrical specifications when
executing servo controls. Always read this section when designing machines and confirm that no
problems exist with the specifications.
3-4-1 Restrictions of 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, and each value (ELG1, ELG2) must be 32767 or
less.
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 specification s and electrical specificatio ns (such as resol ution of the
detector) must be revised so that the electronic ge ars are within the specification s ran ge.
(1) For semi-closed loop control
ELG1
PC2×RNG1
Reduced fraction of
ELG2
=
PC1×PIT×IUNIT
(reduced fraction)
IUNIT = 2/NC command unit (µm)
1µm : IUNIT = 2, 0.1µm : IUNIT = 20
When the above is calculated, the following conditions must be satisfied.
ELG1 ≤ 32767
ELG2 ≤ 32767
(2) For full-closed loop control
PGNX
PC2×RNG2×PGN1
Reduced fraction of
PGNY
=
PC1×RNG1×30
(reduced fraction)
When the above is calculated, the following conditions must be satisfied.
PGNX ≤ 32767
PGNY ≤ 32767
And,
PGNXsp
PC2×RNG2×PGN1sp
Reduced fraction of
PGNYsp
=
PC1×RNG1×30
(reduced fraction)
When the above is calculated, the following conditions must be satisfied.
PGNXsp ≤ 32767
PGNYsp ≤ 32767
POINT
If the electronic gears overflow, the alarm 37 or error parameter No . 101 (2301
with M60S/E60 series NC) will be output.
3. Setup
3 - 64
3-4-2 Restrictions on absolute position control
When executing absolute position control, the following conditions must be satisfied. If not satisfied,
mechanical specifications and electrical specifications (such as resolution of the detector) must be
revised.
When executing incremental control, there are no particular restrictions on servo control. (Confirm with
the NC system side specifications.)
(1) For linear axis
The following conditions, Condition 1 an d 2, must be satisfied simultaneously.
(Condition 1)
2147
Length of stroke ≤
IUNIT
[m]
IUNIT = 2/NC command unit (µm)
1µm : IUNIT = 2， 0.1µm : IUNIT = 20
(Condition 2)
(a) For semi-closed loop control
PC1 x PIT
Length of stroke ≤ 2147 x
PC2 x RNG2
[m]
(b) For full-closed loop control
PIT
Length of stroke ≤ 2147 x
RNG1
[m]
(Note) Even during the full-closed loop control, when the MP scale is used, restrictions are
applied with the condition (a), as well.
(2) For rotary axis
The following conditions must be satisfied.
2147000
PC2 ≤
RNG2
x PC1
3. Setup
3 - 65
3-5 Setting the initial parameters for the spindle drive unit
The spindle specification parameters and spindle parameters must be set before the spindle system
can be started up. The spindle related parameters are input from the NC. The input method differs
according to the NC being used, so refer to each NC Instruction Manual.
3-5-1 Spindle specification parameters
The configuration of these parameters depends on the NC, so refer to each NC Instruction Manual. The
following table shows the configuration of the M60S and E60 Series NC.
M60S
Series
No.
Abbrev. Parameter name Details
Setting rang e
(Unit)
3001
3002
3003
3004
slimit 1
2
3
4
Limit rotation
speed
Set spindle rotation speed for maximum motor rotation speed with gears
00, 01, 10, 11.
(Set the spindle speed for the S analog output 10V.)
0 to 99999
(r/min)
3005
3006
3007
3008
smax 1
2
3
4
Maximum rotation
speed
Set maximum spindle rotation speed with gears 00, 01, 10, 11.
Set to slimt ≥ smax.
By comparing the S command value and the value of gear 1 to 4, a spindle
gear shift command will be output automatically.
0 to 99999
(r/min)
3009
3010
3011
3012
ssift 1
2
3
4
Shift rotation
speed
Set spindle speed for gear shifting with gears 00, 01, 10, 11.
(Note) Setting too large value may cause a gear nicks when changing
gears.
0 to 32767
(r/min)
3013
3014
3015
3016
stap 1
2
3
4
Tap rotation speed
Set maximum spindle rotation speed during tap cycle with gears 00, 01,
10, 11.
0 to 99999
(r/min)
3017
3018
3019
3020
stapt 1
2
3
4
Tap time constant
Set time constants for constant inclination synchronous tap cycles for
gears 00, 01, 10, 11 (linear acceleration/deceleration pattern).
1 to 5000 (ms)