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Delta Tau GEO BRICK LV User Manual

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Turbo PMAC User Manual 
298
 
Writing and Executing Motion Programs 
Sharp Outside Corner 
If the cosine of the change in directed angle is less than Isx99, which means the corner is sharper than the 
specified angle, then an arc move will be added around the outside of the corner.   
Arc
Line
Line
Programmed
Path
Tool Center
Path
r
Line
Line
r
Arc
Line
Line
Programmed
Path
Tool Center
Path
r
r
Arc
Arc
Arc
Programmed
Path
Tool Center
Path
r
Line
Line
r
Arc
Arc
Arc
Programmed
Path
Tool Center
Path
r
r
Arc
Arc
Arc
Arc
Outside Corner Cutter Compensation, Sharp Angle (cos      < Isx99)
∆Θ
Line to Line
Line to Arc
Arc to Arc
Arc to Line
 
Shallow Outside Corner 
However, if the cosine of the change in directed angle is greater than Isx99, which means that the corner 
is flatter than the specified angle, the moves will be directly blended together without an added arc. 
Programmed
 
Path
 
Tool Center
Path
Arc
Arc
Line
Line
 
Line
 
Line
Programmed
Path
Tool Center
Path
Programmed
 
Path
 
Tool Center
Path
Arc
Arc
Line to Line
Line to Arc
Arc to Arc
Arc to Line
Line
Line
Programmed
Path
Tool Center
Path
Arc
 
Arc
 
Outside Corner Cutter Compensation, Shallow Angle ( cos       > Isx99)
Line
Line
Arc
Arc
∆Θ
r
 
r
 
r
r
r
r
r
 
r
 
 
The added arc prevents the compensated corner from extending too far out on the outside of a sharp 
corner.  However, as an added move, it has the minimum time of the acceleration time, which can cause a 
slowdown on a very shallow angle.  While the default value for Isx99 of 0.9998 (cos1
o
) causes an arc to 
be added on any change in angle greater than 1
o
, many users will set Isx99 to 0.707 (cos45
o
) or 0.0 
(cos90
o
) so arcs are only added on sharp corners.