ADLINK PCI-8158 - Manual (Page 62)

52 Operation Theory
The speed ratio along X-axis and Y-axis is (
∆
X:
∆
Y), respectively,
and the vector speed is:
When calling 8-axis linear interpolation functions, the vector speed
needs to define the start velocity, StrVel, and maximum velocity,
MaxVel.
4.2.8 Two axes circular interpolation mode
Circular interpolation means XY axes simultaneously starts from
initial point, (0,0) and stop at end point,(1800,600). The path
between them is an arc, and the MaxVel is the tangential speed.
Notice that if the end point of arc is not at a proper position, it will
move circularly without stopping.
The motion controller will move to the final point user desired even
this point is not on the path of arc. But if the final point is not at the
location of the shadow area of the following graph, it will run circu-
larly without stopping.