Interactive Klartext course · Lesson 5 / 15
Circular arcs with CC, C and CR
Program circular contours either from a defined circle centre or from a radius, then inspect the resulting path in 3D and XY views.
What you will learn
- Define a circle centre with CC without moving the tool.
- Use C for an arc around the active CC centre.
- Use CR when the arc is defined by its radius and direction.
How it works
Before a C block, CC stores the centre coordinates in the active plane. The last tool position is the arc start; C supplies the endpoint and DR selects the direction of rotation.
CR describes an arc by endpoint, radius and rotation direction. It is useful when the radius is known directly and no reusable centre is needed.
Klartext example
Try the essential blocks
This compact example introduces the lesson topic. Use the guided practice for the complete checked exercise.
L X+45 Y+25 FMAX
CC X+25 Y+25
C X+25 Y+45 DR+
CR X+5 Y+25 R+20 DR+Ready to practice?