MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第159页
4. Spindle Adjustment 4 - 68 (9) Synchronous tapping opera tion Carry out trial operation after setting the parameter s. Carry out dry operation without tappin g or a workpiece, and confirm the amount tha t the spindl e …
4. Spindle Adjustment
4 - 67
(6) Confirming pulse feedback output signal
Pulse feedback signal output from the spindle drive unit is confirme d.
Related parameter Nos. and descriptions are as shown below.
No. Abbrev. Parameter name Description
Setting
range
Standard
value
SP037 SFNC5 Spindle function 5
F E D C B A 9 8 7 6 5 4 3 2 1 0
dplg ospcl noplg nsno nosg psdir plgo mago enco
bit Meaning when "0" is set Meaning when "1" is set Standard
0
e
nco Encoder orientation invalid Encoder orientation valid 0
1 mago Magnetic sensor orientation invalid Magnetic sensor orientation valid 0
2 plgo PLG orientation invalid PLG orientation valid 0
SP038 SFNC6 Spindle function 6
F E D C B A 9 8 7 6 5 4 3 2 1 0
oplp lmx iqsv dcsn lmnp vfbs orm plg2 alty
bit Meaning when "0" is set Meaning when "1" is set Standard
3 plg2 Semi-closed pulse output signal×2
invalid
Semi-closed pulse output signal×2
valid
0
The pulse feedback signals with the a bove parameter settings (CN8A-2 to 4, 12 to 14 pi ns) outputs
the following signals.
SP037 setting CN8A-2(SYA), 12(SYA*) CN8A-3(SYB), 13(SYB*) CN8A-4(SYZ), 14(SYZ*)
bit2: "1",
or bit0 to 2: "0"
Motor PLG A phase signal Motor PLG B phase signal
Motor PLG Z phase signal
(Note 1)
bit0: "1" 1024p/rev encoder A phase signal 1024p/rev encoder B phase signal 1024p/rev encoder Z phase signal
bit1: "1" Motor PLG A phase signal Motor PLG B phase signal Magnetic sensor LNZ signal
(Note 1) Z-phase signal will not be output when Z-phase signal is not mounted on the motor PLG.
(Note 2) When "1" is set to SP038 bit3, A-phase and B-phase signals of the motor PLG output doubling the number of pulses per
revolution. (When PLG is 256p/rev, 512p/rev oblong wave is output.)
(Note 3) All the pulse feedback signals are output in oblong wave. For details, refer to the section "2-6-2 Output interface".
(7) Adjusting the analog command offset
Turn the S-analog synchro nou s tapping sign al ON an d confirm the minute vibration when stop ped.
If the vibration is large, set the value of SP158(Adofs) to SP176(HADof) and adjust the value of
SP176(HADof) to minimize the vibration.
Related spindle parameters
No. Abbrev. Parameter name Description
Setting
range
Standard
value
SP176 HADof*
S-analog
high-speed tapping
speed command
offset
Sets the speed command voltage offset value during S-analog
high-speed tapping.
When "0" is set, the value will be the one set in SP158(Adofs).
-999 to 999 0
(8) Adjusting analog command gain
Turn the S analog synchronous tapping signal ON to secure a longer stroke. Carry out dry-run
operation at the highest speed available for synchronous tapping and adjust SP175(HSgn) to gain
the highest desirable spee d.
Related spindle parameters
No. Abbrev. Parameter name Description
Setting
range
Standard
value
SP175 HSgn*
S-analog
high-speed tapping
speed command
gain
Sets the speed command voltage gain during S-analog
high-speed tapping.
When "0" is set, the value will be the one set in SP161(Sgain).
0 to 2500
(1/1000-fold)
0
4. Spindle Adjustment
4 - 68
(9) Synchronous tapping operation
Carry out trial operation after setting the parameters. Carry out dry operation without tapping or a
workpiece, and confirm the amount that the spindle moves in respect to the servo axis. If there is
no problem, proceed with actual cutting operation. If there any problem occurs during dry run
operation or actual cutting operation, refer to the following table and change the settings
accordingly.
NC side setting Spindle drive unit side setting
Position loop gain
Acceleration/
deceleration time
constant
SP172(VGHP)
SP173(VGHI)
SP174(HPYV)
Gear noise is louder than
one in regular operation
The spindle undershoots
or overshoots
Machining accuracy is
poor
Machining time is long
(Note 1) The meaning of the arrows above is as described below.
: Increase the setting value
: Do not change the setting value
: Decrease the setting value
(Note 2) When the gear noise is large in standard setting, and the machining precision deteriorates as the speed loop gain is
decreased, if the motor maximum speed during S analog high-speed tapping is lower than the regular motor maximum
rotation speed, those conditions may be solved by setting a smaller value than SP017(TSP) in SP171(HSPT).
Note that, in this case, the spindle (or the motor) maximum speed during the NC side S analog high-speed tapping must be
changed. Thus, analog speed command offset and analog speed command gain must be adjusted again.
Related spindle parameters
No. Abbrev. Parameter name Description
Setting
range
Standard
value
SP171 HSPT
S-analog
high-speed tapping
motor maximum
speed
Sets the maximum motor speed during S-analog high-speed
tapping.
When "0" is set, the value will be the one set in SP017(TSP).
Sets the maximum motor tapping speed here when the gear
noise is louder than during the regular speed loop operation, or
when you wish to improve the tapping accuracy.
0 to 32767
(r/min)
0
SP172 VGHP
S-analog
high-speed tapping
speed loop
proportional gain
Sets the speed loop proportional gain during S-analog
high-speed tapping.
The larger the value, the higher the responsiveness, but the
bigger the vibration or noise becomes.
When "0" is set, the value will be the one set in
SP022(VGNP1).
0 to 1000 0
SP173 VGHI
S-analog
high-speed tapping
speed loop integral
gain
Set s the speed loop integral gain during S-analog high-speed
tapping
If the value of SP172(VGHP) is set, set the value so that the
setting value’s proportion between SP172 and SP173 is 1:1.
When "0" is set, the value will be the one set in SP023(VGNI1).
0 to 1000 0
SP174 HPYV
S-analog
high-speed tapping
variable excitation
rate (min value)
Sets the minimum value of the variable excitation rate during
S-analog high-speed tapping.
Smaller value is set to suppress the gear noise, etc., and larger
value is set to improve the tapping accuracy.
0 to 100
(%)
0
4. Spindle Adjustment
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4-3-6 Adjusting coil changeover
(1) Necessary input/output
I/O Signal name I/O mode Mandatory/Optional
L coil selection command signal (LCS) General-purpose input
Input
Forward run signal (SRN), reverse run signal (SRI) Dedicated input
L coil selected signal (LCSA) General-purpose output
Output
Changing coil signal (MKC) General-purpose output
: Mandatory : Optional
(2) Operation sequence
L coil select ion c ommand
signal (LCS)
L coil select ed s i gnal (LCS A )
ON
ON
OFF
OFF OFF
OFF
ON
OFF
Base cutoff hold
Changing coil signal (MKC)
Forward run (SRN), reverse run (S RI ) s i gnal
Base ON
Motor const ant s changeover
(parameter)
Output current waveform (approx.)
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
High-speed coil
Low-speed coil High-speed coil
T1
T1
T1: Base cutoff hold time (SP059 Standard setting:150ms)