HEIDENHAIN MANUALPLUS 620 User Manual page 300

Parameter combinations for single holes without contour
description
XS, XE ZS, ZE
XS, K ZS, K
XE, K ZE, K
The cycle is used for:
Single hole without contour description
Hole with contour description (single hole or hole pattern)
"1st drilling depth P" is used for the first pass. MANUALplus then
automatically reduces the drilling depth with each subsequent pass by
the reduction value I, however, without falling below the minimum
drilling depth J. After each pass, the tool is retracted either by return
distance B or to the starting point of the hole. If the safety distance R
is defined, the tool is positioned to this distance at rapid traverse.
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
Single hole without contour description: Program XS or
ZS as alternative.
Hole with contour description: Do not program XS, ZS.
Hole pattern: NS refers to the hole contour, and not the
definition of the pattern.
A "feed rate reduction at end" goes into effect only at
the last drilling stage.
300 ISO Programming