12 - 95
MELSEC-Q
12 CONTROL SUB FUNCTIONS
[2] "Acceleration/deceleration method setting" control details and
setting
In the "acceleration/deceleration method setting", the acceleration/deceleration
processing method is selected and set. The set acceleration/deceleration
processing is applied to all acceleration/deceleration (except for inching operation
and manual pulse generator operation).
The two types of "acceleration/deceleration method setting" are shown below.
(1) Trapezoidal acceleration/deceleration processing method
This is a method in which linear acceleration/deceleration is carried out
based on the acceleration time, deceleration time, and speed limit value set
by the user.
Velocity
Time
Fig. 12.48 Trapezoidal acceleration/deceleration processing method
(2) S-curve acceleration/deceleration processing method
In this method, the motor burden is reduced during starting and stopping.
This is a method in which acceleration/deceleration is carried out gradually,
based on the acceleration time, deceleration time, speed limit value, and
"
Pr.35
S-curve ratio" (1 to 100%) set by the user.
When the stepping motor is used, the acceleration around the inflection
point on the s shape is faster compared with the trapezoidal
acceleration/deceleration. This may cause step-out. 1
In this case, adjust the acceleration/deceleration time to decrease the
acceleration around the inflection point, or use a servo motor.
1: When comparing the trapezoidal acceleration/deceleration and S-curve
acceleration/deceleration processing method in the same
acceleration/deceleration time.
Velocity
Time
Fig. 12.47 S-curve acceleration/deceleration processing method
Summary of Contents for Melsec-Q QD75D1
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Page 41: ...1 17 MELSEC Q 1 PRODUCT OUTLINE MEMO ...
Page 48: ...1 24 MELSEC Q 1 PRODUCT OUTLINE MEMO ...
Page 60: ...2 12 MELSEC Q 2 SYSTEM CONFIGURATION MEMO ...
Page 137: ...5 33 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 232: ...5 128 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 252: ...6 20 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
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Page 436: ...9 120 MELSEC Q 9 MAJOR POSITIONING CONTROL MEMO ...
Page 464: ...10 28 MELSEC Q 10 HIGH LEVEL POSITIONING CONTROL MEMO ...
Page 638: ...14 24 MELSEC Q 14 DEDICATED INSTRUCTIONS MEMO ...
Page 647: ...15 9 MELSEC Q 15 TROUBLESHOOTING MEMO ...
Page 686: ...15 48 MELSEC Q 15 TROUBLESHOOTING MEMO ...
Page 839: ...Appendix 153 MELSEC Q APPENDICES 6 QD75D4N 90 23 27 4 12 98 4 46 Unit mm ...
Page 840: ...Appendix 154 MELSEC Q APPENDICES 7 QD75P1 QD75P2 QD75P4 27 4 23 98 90 4 46 unit mm ...
Page 841: ...Appendix 155 MELSEC Q APPENDICES 8 QD75D1 QD75D2 QD75D4 27 4 23 90 12 98 4 46 unit mm ...
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