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MELSEC-Q
12 CONTROL SUB FUNCTIONS
Calculation example
(Conditions)
Movement amount per pulse
No. of pulses per rotation
Unit magnification
: 500 (
µ
m/rev)
: 12000 (pulse/rev)
: 1
(Positioning results)
Command movement amount
Actual movement amount
: 100mm
: 101mm
(Compensation amount)
AL'
5
×
10
3
101
×
10
3
5050 101
AP'
=
12000
×
101
×
10
3
=
12000
=
240
Movement amount per pulse
No. of pulses per rotation
Unit magnification
: 101 (
µ
m/rev)
: 240 (pulse/rev)
: 1
[Set in
Pr.3
]
[Set in
Pr.2
]
[Set in
Pr.4
]
(e) Set the post-compensation "
Pr.2
No. of pulses per rotation (Ap')",
"
Pr.3
Movement amount per rotation (Al')", and "
Pr.4
Unit
magnification (Am')" in the parameters, and write them 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
Pre-compensation
value
Pr.2
No. of pulses per
rotation
Ap' Set the post-compensation value. Ap
Pr.3
Movement amount
per rotation
Al' Set the post-compensation value. Al
Pr.4
Unit magnification Am' Set the post-compensation value. Am
Refer to Section 5.2 "List of parameters" for setting details.