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Mitsubishi Electric RD77MS2 - Fixed-Feed Control

Mitsubishi Electric RD77MS2
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3 MAJOR POSITIONING CONTROL
3.2 Setting the Positioning Data
83
3
Fixed-feed control
In "fixed-feed control" ("[Da.2] Control method" = fixed-feed 1, fixed-feed 2, fixed-feed 3, fixed-feed 4), the motor of the
specified axis is used to carry out fixed-feed control in a set axis direction.
In fixed-feed control, any remainder of below control accuracy is rounded down to convert the movement amount designated
in the positioning data into the command value to servo amplifier.
Operation chart
In fixed-feed control, the address ([Md.20] Current feed value) of the current stop position (start point address) is set to "0".
Positioning is then carried out to a position at the end of the movement amount set in "[Da.6] Positioning address/movement
amount". The movement direction is determined by the movement amount sign.
Positive movement amount: Positioning control to forward direction (Address increase direction)
Negative movement amount: Positioning control to reverse direction (Address decrease direction)
Ex.
1-axis fixed-feed control
Ex.
2-axis fixed-feed control
00000
"[Md.20] Current feed value"
is set to "0" at the positioning start
Designated
movement
amount
Positioning
start
Reverse direction Forward direction
Stop position
Movement direction for a
negative movement amount
Movement direction for a
positive movement amount
"[Md.20] Current feed value" of each axis
is set to "0" at the positioning start
Designated
movement amount
Designated
movement amount
(0,0)
(0,0)
(0,0)
X axis
Y axis

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