Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 101

Part 3: Review on Replacement of MR-J2S-_B_ with MR-J4-_B_
MR-J2S-_B_
No. Name and function
18 Machine resonance suppression filter 1 (notch filter)
Used to select the machine resonance suppression filter.
0
Notch frequency selection
Setting Frequency Frequency
Setting
00 Invalid 08
01 4500 09
02 2250 0A
03 1500 0B
04 1125 0C
05 900 0D
06 750 0E
07 642.9 0F
Notch depth selection
Setting
0
1
2
3
19 Feed forward gain
Set the feed forward gain.
When the setting is 100%, the droop pulses during operation
at constant speed are nearly zero. However, sudden
acceleration/deceleration will increase the overshoot. As a
standard, when setting the feed forward gain as 100%, set 1
s or more as the acceleration/deceleration time constant up
to the rated speed.
20 In-position range
Set the range of droop pulses occurred when outputting INP
(positioning completion) to a controller. Set by the feedback
pulse unit ([Pr. 6]).
For example, when wanting to set ±10 μm in a state of direct
connection to the ball screw, a lead wire length of 10 mm,
and a feedback pulse 8192 pulses/rev ([Pr. 6]: 1), set "8", as
shown in the equation below.
-6
10 × 10
X 8192 = 8.192 ≈ 8
-3
10 × 10
21 Electromagnetic brake sequence output
Used to set the delay time (Tb) between MBR
(Electromagnetic brake interlock) OFF and base circuit shut-
off.
Frequency Frequency
Setting Setting
562.5 10 281.3 18 187.5
500 11 264.7 19 180
450 12 250 1A 173.1
409.1 13 236.8 1B 166.7
375 14 225 1C 160.1
346.2 15 214.3 1D 155.2
321.4 16 204.5 1E 150
300 17 195.7 1F 145.2
Depth Gain
- 40 dB
Deep
- 14 dB
to
- 8 dB
Shallow
- 4 dB
Initial
No.
value
0000h PB13 Machine resonance suppression filter 1
Used to set the notch frequency of machine resonance
suppression filter 1.
When "Automatic setting (_ _ _ 1)" is selected in "Filter
tuning mode selection" of [Pr. PB01], the adjustment
result is reflected.
When "Manual setting (_ _ _ 2)" is selected in "Filter
tuning mode selection" of [Pr. PB01], this setting value is
enabled.
PB14 Notch shape selection 1
Set the shape of the machine resonance suppression
filter 1.
When "Automatic setting (_ _ _ 1)" is selected in "Filter
tuning mode selection" of [Pr. PB01], the adjustment
result is reflected.
Set manually for the manual setting.
Setting
digit
_ _ _ X For manufacturer setting
_ _ X _ Notch depth selection
0: -40 dB
1: -14 dB
2: -8 dB
3: -4 dB
_ X _ _ Notch width selection
0: α = 2
1: α = 3
2: α = 4
3: α = 5
X _ _ _ For manufacturer setting
0 PB04 Feed forward gain
Set the feed forward gain.
If 100% is set and constant-speed operation is
implemented, pulse droop will be almost zero. However,
sudden acceleration/deceleration will increase the
overshoot. As a standard, when setting the feed forward
gain as 100%, set 1 s or more as the acceleration time
constant up to the rated speed.
100 PA10 In-position range
Used to set an in-position range per command pulse unit.
0 PC02 Electromagnetic brake sequence output
Used to set the delay time between MBR
(Electromagnetic brake interlock) OFF and base circuit
shut-off.
3 - 24
MR-J4-_B_
Name and function
Initial
Explanation
value
0h
0h
0h
0h
Initial
value
4500
0000h
0
1600
0