12 - 13
MELSEC-Q
12 CONTROL SUB FUNCTIONS
[2] Control Precautions
(1) The feed pulses of the backlash compensation amount are not added to the
" Md.20 Current feed value" or " Md.21 Machine feed value".
(2) Always carry out a machine OPR before starting the control when using the
backlash compensation function (when " Pr.11 Backlash compensation
amount" is set). The backlash in the mechanical system cannot be correctly
compensated if a machine OPR is not carried out.
(3) Set the No. of pulses output in one backlash compensation (value in which
the " Pr.11 Backlash compensation amount" is divided by the "movement
amount per pulse") to a value of 255 or lower. An error "Backlash
compensation amount error" (error code: 920) will occur if a value over 255
is set. (Depending on the connected servo, tracking may not be possible if a
large amount of pulses is output at once.)
0
Backlash compensation amount
255
Movement amount per pulse
(Omit values after the decimal point.)
(4) Backlash compensation, which includes the movement amount and
" Pr.11 Backlash compensation amount", is output the moment at the
moving direction changes.
(5) Backlash compensation cannot be made when the stepping motor is used.
The backlash compensation function cannot be used for an axis where a
stepping motor is connected. Set 0 (initial value) in " Pr.11 Backlash
compensation amount".
[3] Setting method
To use the "backlash compensation function", set the "backlash compensation
amount" in the parameter shown in the following table, and write it to the QD75.
The set details are validated at the rising edge (OFF
ON) of the PLC READY
signal (Y0).
Setting item
Setting
value
Setting details
Factory-set
initial value
Pr.11
Backlash
compensation
amount
Set the backlash compensation amount.
0
Refer to Section 5.2 "List of parameters" for setting details.
REMARK
Parameters are set for each axis.
It is recommended that the parameters be set whenever possible with GX
Configurator-QP. Execution by sequence program uses many sequence programs
and devices. The execution becomes complicated, and the scan times will
increase.
Summary of Contents for D75D4
Page 2: ......
Page 22: ...A 20 MEMO ...
Page 24: ...MEMO ...
Page 41: ...1 17 MELSEC Q 1 PRODUCT OUTLINE MEMO ...
Page 48: ...1 24 MELSEC Q 1 PRODUCT OUTLINE MEMO ...
Page 58: ...2 10 MELSEC Q 2 SYSTEM CONFIGURATION MEMO ...
Page 65: ...3 7 MELSEC Q 3 SPECIFICATIONS AND FUNCTIONS ...
Page 139: ...5 35 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 238: ...5 134 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 251: ...6 13 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
Page 254: ...6 16 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
Page 255: ...6 17 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
Page 256: ...6 18 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
Page 259: ...6 21 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
Page 260: ...6 22 MELSEC Q 6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL ...
Page 292: ...7 8 MELSEC Q 7 MEMORY CONFIGURATION AND DATA PROCESS ...
Page 294: ...7 10 MELSEC Q 7 MEMORY CONFIGURATION AND DATA PROCESS ...
Page 298: ...MEMO ...
Page 462: ...9 140 MELSEC Q 9 MAJOR POSITIONING CONTROL MEMO ...
Page 490: ...10 28 MELSEC Q 10 HIGH LEVEL POSITIONING CONTROL MEMO ...
Page 524: ...11 34 MELSEC Q 11 MANUAL CONTROL Creating the program ...
Page 666: ...14 24 MELSEC Q 14 DEDICATED INSTRUCTIONS MEMO ...
Page 675: ...15 9 MELSEC Q 15 TROUBLESHOOTING MEMO ...
Page 716: ...15 50 MELSEC Q 15 TROUBLESHOOTING MEMO ...
Page 725: ...Appendix 9 MELSEC Q APPENDICES MEMO ...
Page 878: ...Appendix 162 MELSEC Q APPENDICES 6 QD75D4N 90 23 27 4 12 98 4 46 Unit mm ...
Page 879: ...Appendix 163 MELSEC Q APPENDICES 7 QD75P1 QD75P2 QD75P4 27 4 23 98 90 4 46 unit mm ...
Page 880: ...Appendix 164 MELSEC Q APPENDICES 8 QD75D1 QD75D2 QD75D4 27 4 23 90 12 98 4 46 unit mm ...
Page 893: ...WARRANTY ...
Page 895: ......