S Start point
E End point
M Center of circle
r Circle radius
t End tangents of the programmed contour of the last block with a traversing movement.
Figure 2-4 Tangentially to the straight section 1-2 connecting circular path S-E
Figure 2-5 Tangentially connecting circular paths depend on the previous contour element
Syntax
CT X… Y… Z…
Meaning
CT: Circular interpolation with tangential transition
Effective: Modal
X... Y... Z... : Circle end point in Cartesian coordinates.
Depending on the currently valid dimensional notation setting G90/G91
or ...=AC(...) / ...=IC(...), the circle end point coordinates are in‐
terpreted either in the absolute dimension or in the incremental dimension.
Fundamentals
2.9 Motion commands
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0 201