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12 CONTROL SUB FUNCTIONS
Setting item
Backlash
Pr.11
compensation
amount
Refer to Section 5.2 "List of parameters" for setting details.
[2] Precautions during control
(1) The feed command of the backlash compensation amount are not added to
Md.20
the "
(2) Always carry out a machine OPR before starting the control when using the
backlash compensation function (when "
amount" is set). The backlash in the mechanical system cannot be correctly
compensated if a machine OPR is not carried out.
(3) Backlash compensation, which includes the movement amount and
"
Pr.11
Backlash compensation amount", is output the moment at the
moving direction changes.
[3] Setting the backlash compensation function
To use the "backlash compensation function", set the "backlash compensation
amount" in the parameter shown in the following table, and write it to the
QD75MH.
The set details are validated at the rising edge (OFF
signal (Y0).
Setting
value
Set the backlash compensation amount.
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with GX
Configurator-QP. Execution by PLC program uses many PLC programs and
devices. The execution becomes complicated, and the scan times will increase.
Current feed value" or "
Setting details
12 - 12
Md.21
Machine feed value".
Pr.11
Backlash compensation
ON) of the PLC READY
MELSEC-Q
Factory-set
initial value
0
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