Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 183

Processing details
Using the reference axis (control method [20: Interpolation Operation (Relative Address Specification)]) and counterpart axis
(control method [21: Interpolation Operation (Relative Address Specification Target Axis)]), which is specified in operand 4,
linear interpolation positioning is performed. (Page 184) The transfer distance of the operation is the distance from the
current stop position (start address) to the positioning addresses specified in operand 1 of the reference axis and the
counterpart axis. For the counterpart axis specified in operand 1, [21: Interpolation Operation (Relative Address Specification
Target Axis)] is assigned as the control method in the same table number as that for the reference axis. If dwell time is set, the
complete flag turns on after the dwell time elapses. (Page 77)
This table cannot be specified for continuous operation.
Forward direction (counterpart axis)
Transfer distance of
the counterpart axis
(Operand 1)
Reverse direction
(reference axis)
Reverse direction (counterpart axis)
*1 The calculation method differs depending on the specification method for the interpolation speed. (Page 72 Interpolation Speed
Specified Method)
Precautions
• This table cannot be specified for continuous operation. When a table with this control method is executed in continuous
operation, the operation is decelerated to a stop.
• When the specification method for the interpolation speed is [Reference-axis speed], set the axis with the longer positioning
address as the reference axis. If the axis with the shorter positioning address is set as the reference axis, the speed of the
longer axis may exceed the maximum speed and interpolation operation cannot be performed properly.
• When forward limit or reverse limit is detected in either of the reference axis or counterpart axis during interpolation
operation, both the axes are decelerated to a stop.
• Do not change the value of operand 4.
• This function is not intended for purposes where high precision path is required because each axis is only started
simultaneously.
Using the following or similar set values, in particular, may lead to a larger difference in stop time between each axis. Even
when there is a difference in stop time, operation stops at the correct position.
1.
When there is a large difference in transfer distance between the reference axis and counterpart axis
2.
When the speed of the reference axis or counterpart axis is equal to or lower than the bias speed or exceeds the
maximum speed
3.
When the speeds of the reference axis and counterpart axis are extremely slow
4.
When an extremely long acceleration time or deceleration time is set
If interpolation operation is aborted, the stop position of each axis may be off the straight line.
• If interpolation operation specified with a relative address is repeatedly used in machine or multiple unit system, calculation
errors may accumulate for each axis.
(Positioning address (reference axis),
positioning address (counterpart axis))
Start address
(Stop position)
Moves at the
interpolation
speed.
Transfer distance of the reference axis
(Operand 1)
Stop address
*1
Forward direction
(reference axis)
6 TABLE OPERATION
6.2 Operations of Control Method
6
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