Mitsubishi A1SD75M1, User Manual

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9 - 31
MELSEC-A
9 MAIN POSITIONING CONTROL
9.2.5 2-axis fixed-dimension feed control (interpolation)
In "2-axis fixed-dimension feed control" (" Da.2 Control method" = fixed-dimension
feed 2), two motors are used to carry out fixed-dimension feed control in a linear path
while carrying out interpolation for the axis directions set in each axis.
In fixed-dimension feed control, any remainder of the movement amount designated in
the positioning data is rounded down if less than that required for control accuracy to
output the same amount of position commands. (The remainder of the movement
amount with an accuracy below the control accuracy does not affect the regular
controls.)
(Refer to section "9.1.6 Interpolation control" for details on interpolation control.)
Operation chart
In increment system 2-axis fixed-dimension feed control, the addresses ( Md.29
Current feed value) of the current stop position (start addresses) of both axes are
set to "0". Linear interpolation positioning is then carried out from that position to a
position at the end of the movement amount set in " Da.5 Positioning
address/movement amount". The movement direction is determined by the sign of
the movement amount.
" Md. 29 Current feed value" of each axis
is set to "0" at the positioning start
(0,0)
(0,0)
(0,0)
X axis
Y axis
Designated movement
amount
Designated movement
amount