Operation Theory
45
To specify a circular interpolation path, the following parameters
must be clearly defined:
X
Center point: The coordinate of the center of arc (In abso-
lute mode) or the off_set distance to the center of arc (In rel-
ative mode)
X
End point: The coordinate of end point of arc (In absolute
mode) or the off_set distance to center of arc (In relative
mode)
X
Direction: The moving direction, either CW or CCW.
It is not necessary to set radius or angle of arc, since the informa-
tion above gives enough constrains. The arc motion is stopped
when either of the 2 axes reached end point.
There are two groups of functions that provide 2-axis circular inter-
polation. The first group divides the 4 axes into XY (axis 0 & axis
1) and ZU (axis 2 & axis 3). By calling these functions, the target
axes are already assigned.
HSL_M_start_r_arc_xy()
HSL_M_start_r_ arc _zu()
HSL_M_start_a_ arc _xy()
HSL_M_start_a_ arc _zu()
The second group allows user to freely assign any targeted 2
axes.
HSL_M_start_r_arc2()
HSL_M_start_a_arc2()
Circular Interpolation with Acc/dec Time
In section 4.1, the circular interpolation functions do not support
acceleration and deceleration parameters; therefore, they cannot
perform a T or S curve speed profile during operation. However,
sometimes the need for an Acc/Dec time speed profile will help a
machine to make more accurate circular interpolation. The HSL-
4XMO has another group of circular interpolation functions to per-
form this type of interpolation, but requires the use of Axis3 as an
aided axis, which means that Axis3 cannot be used for other pur-
poses while running these functions. For example, to perform a
circular interpolation with a T-curve speed profile, the function
HSL_M_start_tr_arc_xyu() is used. This function will used Axis0
Содержание HSL-4XMO
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Страница 67: ...Operation Theory 57 Home Search Example Home mode 1 Figure 4 29 Home Search Example ...
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