5 - 31
Chapter 5 Data Used for Positioning Control
Pr.11
Backlash compensation amount
The error that occurs due to backlash when moving the machine via gears can be
compensated.
(When the backlash compensation amount is set, commands equivalent to the
compensation amount will be output each time the direction changes during
positioning.)
Workpiece
(moving body)
Worm gear
Backlash
(compensation amount)
Pr.44
OPR direction
1) The backlash compensation is valid after machine OPR. Thus, if the backlash
compensation amount is set or changed, always carry out machine OPR once.
2) "
Pr.2
Number of pulses per rotation (AP)", "
Pr.3
Movement amount per
rotation (AL)", "
Pr.4
Unit magnification (AM)" and "
Pr.11
Backlash
compensation amount" which satisfies the following (1) can be set up.
0
(
Pr.11
Backlash compensation amount)
(
Pr.2
Number of pulses per rotation (AP))
( = A)
4194303 (PLS) ….(1)
(
Pr.3
Movement amount per rotation (AL))
(
Pr.4
Unit magnification (AM))
(round down after decimal point)
The error "Backlash compensation amount error" (error code: 920) occurs
when the setting is outside the range of the calculation result of (1).
A servo alarm (error code: 2031, 2035, etc.) may occur by kinds of servo
amplifier (servomotor), load inertia moment and the amount of command of a
cycle time (Simple Motion module) even if the setting is within the calculation
result of (1).
Reduce the setting value of "
Pr.11
Backlash compensation amount" or
increase the operation cycle by "
Pr.96
Operation cycle setting
" if a servo alarm
occurs. Use the value of the following (2) as a measure that a servo alarm
does not occur.
A
(Maximum motor speed (r/min) )
1.2 (Encoder resolution (PLS/r) ) (Operation cycle (ms))
(PLS) ....(2)
60(s) 1000 (ms)
Summary of Contents for MELSEC-L Series
Page 2: ......
Page 30: ...MEMO ...
Page 70: ...2 10 Chapter 2 System Configuration MEMO ...
Page 83: ...3 13 Chapter 3 Specifications and Functions MEMO ...
Page 103: ...3 33 Chapter 3 Specifications and Functions MEMO ...
Page 107: ...3 37 Chapter 3 Specifications and Functions MEMO ...
Page 111: ...3 41 Chapter 3 Specifications and Functions MEMO ...
Page 115: ...3 45 Chapter 3 Specifications and Functions MEMO ...
Page 140: ...4 22 Chapter 4 Installation Wiring and Maintenance of the Product MEMO ...
Page 253: ...5 113 Chapter 5 Data Used for Positioning Control MEMO ...
Page 342: ...5 202 Chapter 5 Data Used for Positioning Control MEMO ...
Page 438: ...7 20 Chapter 7 Memory Configuration and Data Process MEMO ...
Page 440: ...MEMO ...
Page 485: ...9 25 Chapter 9 Major Positioning Control MEMO ...
Page 594: ...9 134 Chapter 9 Major Positioning Control MEMO ...
Page 624: ...10 30 Chapter 10 High Level Positioning Control MEMO ...
Page 656: ...11 32 Chapter 11 Manual Control MEMO ...
Page 690: ...12 34 Chapter 12 Expansion Control MEMO ...
Page 798: ...13 108 Chapter 13 Control Sub Functions MEMO ...
Page 866: ...14 68 Chapter 14 Common Functions MEMO ...
Page 884: ...15 18 Chapter 15 Dedicated Instructions MEMO ...
Page 899: ...16 15 Chapter 16 Troubleshooting MEMO ...
Page 1036: ...Appendix 88 Appendices MEMO ...
Page 1039: ......