bnp-b2365(eng)b.pdf - 第279页

5. Spindle Adjustment 5 - 34 (8) Adjusting excitation rate If the motor noise is excessive during constant -speed operation, adjust the variable excitation (SP056) value downward i n decrements of 10 from th e standard s…

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5. Spindle Adjustment
5 - 33
(7) Adjusting current loop gain
Although the default setting value is usually appropriate, an adjustment may be required if slight
vibration occurs at high spindle motor rotating. In such cases, adjust the target value of variable
current loop gain (SP069) parameter setting while observing the current waveform in the
high-speed range. Adjust until the output waveform to the spindle motor stabilizes.
Set the change starting/ending sp eed of variable current loop gain (SP067 and SP068) param eters
in accordance with the motor's maximum rotation sp eed.
No. Abbr. Parameter name Details
Setting
range
Standard
SP067 VIGWA* Change starting
speed of variable
current loop gain
Set the speed where the current loop gain change starts. 0 to 32767
(r/min)
0
SP068 VIGWB* Change ending
speed of variable
current loop gain
Set the speed where the current loop gain change ends. 0 to 32767
(r/min)
0
Set the magnification of current loop gain (torque component
and excitation component) for a change ending speed defined
in SP068 (VIGWB).
When this parameter is set to "0", the magnification is 1.
SP069×(1/16) fold
1-fold
SP067 SP068 SP017
SP069 VIGN* Target value of
variable
current loop gain
Setting value SP017(TSP)
Maximum motor
speed
SP067
(VIGWA)
SP068
(VIGWB)
SP069
(VIGN)
0 to 6000 0 0 0
6001 to 8000 5000 8000 45
8001 or more 5000 10000 64
0 to 32767
(1/16-fold)
0
Adjusting SP069
Vibration in current waveform?
SP069 adjustment completed
NO
NO
Measure acceleration/deceleration
waveform at high speed
Increase SP069 by +8.
YES
YES
Default settings in accordance
with motor's max. rotation speed
(SP067, SP068, SP069)
Improved?
A
djust by increasing the SP069
setting in increments of 8
A
djust by decreasing the SP069
setting in decrements of 8
5. Spindle Adjustment
5 - 34
(8) Adjusting excitation rate
If the motor noise is excessive during constant-speed operation, adjust the variable excitation
(SP056) value downward in decrements of 10 from the standard setting of 50 (setting lower limit =
25). The SP033/bit9 parameter setting is an effective way to reduce noise for hi gh-speed operation
only (it lowers the excitation rate for high-speed operation only).
No. Abbr. Parameter name Details
Setting
range
Standard
SP056 PYVR Variable excitation
(min value)
Set the minimum value of the variable excitation rate.
Select a smaller value when gear noise is too high.
Larger value is more effective on impact response.
0 to 100
(%)
50
<For MDS-C1-SP/SPH/SPX/SPHX>
F EDCBA98765 4 3 2 10
poff hzs ront pycal pychg pyst pyoff sftk dflt 1a2m
bit Meaning when set to 0 Meaning when set to 1
Standard
9 pycal
(Conventional specifications) High-speed rate deceleration
method valid for minimum
excitation rate
0
SP033 SFNC1* Spindle function 1
5. Spindle Adjustment
5 - 35
(9) Adjusting deceleration time
When the deceleration time "td" is significantly different from the acceleration time "ta" (td < 0.95 × ta,
1.1 × 1a < td) and no problem with the acceleration time, adjust the deceleration time by changing
the target value of variable torque limit magnification at deceleration (SP087) setting. In cases,
however, where the variable torque characteristic cannot be lowered to the SP087 level, adjust by
changing the speed for starting change of variable torque limit magnification at deceleration (SP088)
setting.
No. Abbr. Parameter name
Details
Setting
range
Standard
SP087 DIQM* Target value of
variable torque limit
magnification at
deceleration
Set the minimum value of variable torque limit at deceleration. 0 to 150
(%)
75
Set the speed where the torque limit value at deceleration
starts to change.
Torque limit
Inversely proportional to
speed
SP088 DIQN*
Speed for starting
change of variable
torque limit
magnification at
deceleration
100%
SP087
SP088 SP017 Speed
0 to 32767
(r/min)
3000
Adjusting SP087, SP088
td > 1.1 × ta?
SP087, SP088 adjustment completed
Increase SP087 by +5.
YES
NO
Measure acceleration/deceleration
waveform at high speed
td < 0.95 × ta?
Increase SP087 by –5.
YES
NO
SP087<100 × – ?
SP088
SP017
Increase SP088 by –500.
YES
NO