Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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12 DATA USED FOR POSITIONING CONTROL
12.3 Basic Setting
391
12
Detailed parameter 1
[Pr.11] Backlash compensation amount
The error that occurs due to backlash when the machine is moved via gears can be compensated.
(When the backlash compensation amount is set, pulses equivalent to the compensation amount is output each time the
direction changes during the positioning.)
• The backlash compensation is valid after machine OPR. Thus, if the backlash compensation amount is set or changed,
always perform machine OPR once.
• The setting range of the backlash compensation amount is 0 to 65535. Set the amount with the following condition
satisfied.
(Omit values after the decimal point.)
■ Buffer memory address
The following table shows the buffer memory address of this area.
■
Setting range
The setting range depends on the setting of [Pr.1] Unit setting.
*1 When this buffer memory area is set with programs, a calculation is performed in the RD75 to convert a setting value to the value in
each unit. For setting this buffer memory area, take the value after the unit conversion into consideration.
■ Default value
The default value is 0 for all the axes.
Buffer memory name Axis 1 Axis 2 Axis 3 Axis 4
[Pr.11] Backlash compensation amount 17 167 317 467
Setting of [Pr.1] Unit setting Setting value with engineering tools Setting value with programs
*1
0: mm 0 to 6553.5 (

m) 0 to 65535 (

10
-1

m)
1: inch 0 to 0.65535 (inch) 0 to 65535 (

10
-5
inches)
2: degree 0 to 0.65535 (degree) 0 to 65535 (

10
-5
degrees)
3: pulse 0 to 65535 (pulse) 0 to 65535 (pulse)
Pr.44
Workpiece
(moving body)
OPR direction
Backlash
(compensation amount)
Worm gear
0 ≤
Backlash compensation amount
≤ 255
Movement amount per pulse