Mitsubishi Electric MELSEC-Q Series User Manual page 626

[Positioning by interpolation]
Positioning
data No.1
Positioning data No.1
Fig. 13.10 Path and output speed of various axes when movement direction varies
[2] Precautions during control
(1) If the movement amount designated by the positioning data is small when
the continuous path control is executed, the output speed may not reach the
designated speed.
(2) The movement direction is not checked during interpolation operation.
Therefore, a deceleration stops are not carried out even if the movement
direction changes. (See below) For this reason, the output will rapidly
reverse when the reference axis movement direction changes. To prevent
the rapid output reversal, assign not the continuous path control "11", but
the continuous positioning control "01" to the positioning data of the passing
point.
Positioning
data No.2
Reference
axis
Continuous path control
during continuous path control
[Operation of reference axis]
V
Positioning data No.1
[Operation of partner axis for interpolation]
V
Positioning data No.1
13 - 22
Chapter 13 Control Sub Functions
Positioning data No.2
Rapidly reverse
direction
Positioning data No.2
t
t