HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 314)

314 DIN programming
4.22 Dr
illing cy
cles
Feed rate reduction:
 Indexable insert drill and twist drill with 180° drilling angle
 A feed rate reduction is only effective if the parameter "Drilling
length A" has been defined.
 Other drills
 Beginning of hole: Feed rate reduction as programmed in V
 End of hole: Reduction as of hole end point—length of first cut—
safety clearance
 Length of first cut = tool tip
 Safety clearance: See user parameter or G47, G147
Parameter combinations for single holes without contour
description
XS, XE ZS, ZE
XS, K ZS, K
XE, K ZE, K
Cycle run
1
 Hole without contour definition: Tool is located at the
starting point (safety distance from the bore hole).
 Hole with contour description: Tool moves at rapid traverse
to the starting point:
 RB not programmed: Moves up to the safety clearance
 RB programmed: Moves to the position RB and then to the
safety clearance
2 Spot drilling. Feed rate reduction depending on V
3 Drilling at feed rate.
4 Through drilling. Feed rate reduction depending on V
5 Retraction at rapid traverse or feed rate, depending on D.
6 Return position:
 RB not programmed: Retraction to the starting point
 RB programmed: Retraction to the position RB