HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 540)

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Machining sequence for undercuts
Main machining Submachining Location Execution
Undercutting Contour analysis/machining:
Determining the "Undercuts" form
elements:
 Type H – Machining using single paths of traverse; copying tool
(type 22x)
 Type K – Machining using single paths of traverse; copying tool
(type 22x)
 Type U – Machining using single paths of traverse; recessing
tool (type 15x)
Sequence
: First outside, then inside machining; first radial, then
axial machining
All – All recess types; outside and inside
Type H, K, U – Radial/axial machining – outside and inside
Type H, K, U Outside Machining – outside
Type H, K, U Inside Machining – inside