arc — Tangent-continuation arcMotion

An arc that leaves the previous move tangentially, to a point.

arc tangent to (<x>, <y>[, <z>])

Equivalents: Siemens CT

ParameterTypeDefault
pointmmthe arc end point

Solves the arc whose start tangent **continues the previous move's direction** and ends at the given point — smooth, gouge-free blends without you computing a centre or radius. The controller derives the centre (on the line through the start, perpendicular to the entry tangent) and the sweep sense from that tangent. Ideal for blending a straight lead-in into a curved wall, or chaining arcs along a contour, where the radius is whatever makes it tangent.

tangent blend
units mm
defaults { feed 300 }
g1 x20 y0
arc tangent to (40, 20)

See also: g2 · g3

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