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7. SPECIAL ADJUSTMENT FUNCTIONS
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(d) Adjusting the lost motion compensation
When protrusions still occur, the compensation is insufficient. Increase the lost motion compensation
by approximately 0.5% until the protrusions are eliminated. When notches occur, the compensation
is excessive. Decrease the lost motion compensation by approximately 0.5% until the notches are
eliminated. Different values can be set as the compensation for each of when the forward rotation
(CCW) switches to the reverse rotation (CW) and when the reverse rotation (CW) switches to the
forward rotation (CCW).
The locus before compensation
The locus after compensation
Compensation
Travel
direction
(e) Adjusting the lost motion compensation timing
When the machine has low rigidity, the speed loop gain is set lower than the standard setting value,
or the servo motor is rotating at high speed, quadrant projections may occur behind the quadrant
change points. In this case, you can suppress the quadrant projections by delaying the lost motion
compensation timing with [Pr. PE49 Lost motion compensation timing]. Increase the setting value of
[Pr. PE49] from 0 ms (initial value) by approximately 0.5 ms to adjust the compensation timing.
Before timing delay compensation
After timing delay compensation
Compensation
Travel
direction
(f) Adjusting the lost motion compensation non-sensitive band
When the lost motion is compensated twice around a quadrant change point, set [Pr. PE50 Lost
motion compensation non-sensitive band]. Increase the setting value so that the lost motion is not
compensated twice. Setting [Pr. PE50] may change the compensation timing. Adjust the lost motion
compensation timing of (2) (e) in this section.
Before timing delay compensation
After timing delay compensation
Compensation
Travel
direction
Summary of Contents for MR-J4-100A(-RJ)
Page 19: ...10 MEMO ...
Page 75: ...1 FUNCTIONS AND CONFIGURATION 1 56 MEMO ...
Page 83: ...2 INSTALLATION 2 8 MEMO ...
Page 159: ...3 SIGNALS AND WIRING 3 76 MEMO ...
Page 203: ...4 STARTUP 4 44 MEMO ...
Page 351: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 40 MEMO ...
Page 365: ...8 TROUBLESHOOTING 8 14 MEMO ...
Page 387: ...9 DIMENSIONS 9 22 MEMO ...
Page 403: ...10 CHARACTERISTICS 10 16 MEMO ...
Page 553: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 30 MEMO ...
Page 567: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 607: ...14 COMMUNICATION FUNCTION MITSUBISHI ELECTRIC GENERAL PURPOSE AC SERVO PROTOCOL 14 40 MEMO ...
Page 639: ...15 USING A LINEAR SERVO MOTOR 15 32 MEMO ...
Page 767: ...18 MR J4 03A6 RJ SERVO AMPLIFIER 18 84 MEMO ...
Page 856: ...APPENDIX App 41 ...
Page 905: ...MEMO ...