Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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3 MAJOR POSITIONING CONTROL
3.2 Positioning Data Setting
Fixed-feed control
In the fixed-feed control ([Da.2] Control method = Fixed-feed 1, 2, 3, or 4), motors for the number of specified axes are used
to perform the fixed-feed control in the set axis direction.
In the fixed-feed control, any reminder of the movement amount specified in the positioning data is rounded down to output
the same amount of pulses if it is less than that required for control accuracy.
Operation chart
In the fixed-feed control, the address ([Md.20] Current feed value) of the current stop position (start point address) is set to 0,
and the positioning for the movement amount set in [Da.6] Positioning address/movement amount is performed. The
movement direction is determined by the sign of the movement amount.
• Example of the 1-axis fixed-feed control
• Example of the 2-axis fixed-feed control
0 0 0 0 0
Md.20 Current feed value is set
to 0 at the positioning start.
Positioning start
Reverse direction Forward direction
Stop position
Movement direction with
a negative movement amount Movement direction with
a positive movement amount
Specified
movement amount
(0, 0)
(0, 0)
(0, 0)
Y axis
X axis
Md.20 Current feed value of each axis is
set to 0 at the positioning start.
Specified movement
amount
Specified movement
amount