Mitsubishi QD75M1 User Manual page 720

15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3
— — —
Auto tuning
30108 30208 30308
Servo response
30109 30209 30309
Input signal logic selection
31 181 331
— — —
— — —
Input signal logic selection
31 181 331
— — —
Auto tuning
30108 30208 30308
Servo response
30109 30209 30309
— — —
— — —
Acceleration time
12, 13 162, 163 312, 313 482, 483
36, 37 186, 187 336, 337 486, 487
38, 39 188, 189 338, 339 488, 489
40, 41 190, 191 340, 341 490, 491
Deceleration time
14, 15 164, 165 314, 315 464, 465
42, 43 192, 193 342, 343 492, 493
44, 45 194, 195 344, 345 494, 495
46, 47 196, 197 346, 347 496, 497
Check point
Axis 4
—
30408
30409
481
—
When the servomotor shaft is
rotated with the servo off, the
cumulative feedback pulses
— should vary in proportion to the
rotary angle. If the indication skips
or returns midway the encoder if
faulty.
481
—
30408
30409
—
When the servomotor shaft is
rotated with the servo off, the
cumulative feedback pulses
— should vary in proportion to the
rotary angle. If the indication skips
or returns midway the encoder if
faulty.
• Reduce load.
• Review operation pattern.
• Use servomotor that provides larger output.
• Repeat acceleration/deceleration to execute
" Pr.108 Auto tuning".
• Change " Pr.109 Servo response" setting.
• Set " Pr.108 Auto tuning" to OFF and make gain
adjustment manually.
• Review operation pattern.
• Install limit switches.
Connect correctly.
Change servomotor.
• Review operation pattern.
• Install limit switches.
Connect correctly.
• Repeat acceleration/deceleration to execute
" Pr.108 Auto tuning".
• Change " Pr.109 Servo response" setting.
• Set " Pr.108 Auto tuning" to OFF and make gain
adjustment manually.
Change the servo amplifier.
Change the servomotor.
Increase the acceleration/deceleration time
constant.
15 - 73
MELSEC-Q
Corrective action