HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 95)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 95
2.5 Units—Dr
illing in C axis
"Linear pattern drilling, lateral surface" unit
The unit machines a linear drilling pattern in which the individual
features are arranged at a regular spacing on the lateral surface.
Unit name: G74_Lin_Mant_C / Cycle: G74 (see page 331)
Access to the technology database:
 Machining operation: Drilling
 Affected parameters: F, S
Pattern form
Q
Number of holes
Z1, C1 Starting point of pattern
Wi Angle increment
W End angle
Z2 End point of pattern
Cycle form
X1
Start point drill (starting point of hole; diameter value)
X2 End point drill (end point of hole; diameter value)
E Delay (dwell time at end of hole) (default: 0)
D Retraction at
 0: Rapid traverse
 1: Feed rate
V Feed rate reduction
 0: Without reduction
 1: At end of the hole
 2: At start of the hole
 3: At start and end of the hole
AB Spot drilling / through drilling length (distance for feed rate
reduction)
P Hole depth
IB Hole depth reduction value: Value by which the feed depth
decreases after every advance.
JB Minimum hole depth: If you have entered a hole depth
reduction value, the hole depth is reduced only to the value
entered in JB.
B Retraction distance: Value by which the tool is retracted
after reaching the respective hole depth.
RI Internal safety clearance: Distance for reapproach inside
the hole (default: safety clearance SCK).
RB Retraction plane (default: return to the starting position or
to the safety clearance)