Interactive Klartext course · Lesson 14 / 15

Chamfering with DL and DR tool offsets

Use temporary tool-length and tool-radius delta values to place the cutting flank of a countersink on a hole or contour edge.

What you will learn

  • Understand DL as a delta to tool length and DR as a delta to tool radius.
  • Apply offsets only for the operation that requires them.
  • Verify the effective tool geometry and resulting chamfer in simulation.

How it works

DL and DR supplement the active tool data in a TOOL CALL block. They can shift the programmed reference point so a specific part of a shaped tool follows the target edge.

The required values depend on the real tool geometry and setup. The lesson demonstrates the simulator workflow; production values must always be verified independently.

Klartext example

Try the essential blocks

This compact example introduces the lesson topic. Use the guided practice for the complete checked exercise.

TOOL CALL 5 Z S10000 F1000 DL-2 DR+2
M3
CYCL DEF 208 ; edge chamfer operation
 Q200=+2   ; safety clearance
 Q201=-1   ; edge-break depth
 Q206=+300 ; plunge feed
 Q334=+1   ; infeed per helix turn
 Q203=+0   ; surface coordinate
 Q204=+30  ; second safety clearance
 Q335=+10  ; nominal diameter
 Q342=+10  ; existing milled diameter
 Q351=+1   ; climb milling
 Q370=+1   ; path overlap factor
L X+50 Y+50 FMAX M99

Ready to practice?

Write the blocks and check the 3D result

Open lesson 14 in TNC Sim