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MELSEC-A
10. Setting Positioning Parameter
10.2.9
(1)
lnter~olation
s~eed s~ecification
When performing linear interpolation/circular interpolation control, whether to specify the
synthesized speed or reference-axis speed is set.
: Specifies the travel speed of the controlled system.
●
Synthesized speed
The D75P2 calculates the speed of each axis.
.
Reference-axis
speed: Specifies the speed of the axis being set as a reference axis.
The D75P2 calculates the speed of the other axis used for
interpolation.
‘f axis
Y axis
Synthesized apeed is
specified
--------
--------
Calculated by
the D75P2
.-.--.--—---.-h
X axis
Speed of the reference axis is specified
Calculated by the D75P2
(a) When the synthesized speed is specified
(2)
X axis
(b) When the reference axis is specified
(When X axis is the reference axis)
In circular-interpolation operation, an error occurs when specified unit groups do not match, and
positioning using the specified positioning data will not be performed.
_Ew!__l
When the speed calculated by the D75P2 exceeds the speed limit value during interpolation
control, control is performed ignoring the speed limit value.
Therefore, when specifying an interpolation speed, pay attention to the items described below:
●
When specifying the synthesized speed, specify the speed of each axis not to exceed the
speed limit value.
●
When specifying the reference-axis speed, set the longer axis as the reference axis.
If the shorter axis is set as the reference axis, the speed of the longer axis may exceed the
speed limit value.
EEEl
The unit groups are as follows.
●
Group 1: mm, inch
●
Group 2: degree
●
Group 3: pulse
10-16
‘L. /’