Boring (Cycle86) - Siemens SINUMERIK 840D Operating Manual

Parameter Description
Dwell time at drilling depth in seconds
DTB - (only for G 
code)
Dwell time at drilling depth in revolutions

Dwell time at final drilling depth in seconds
DT 
Dwell time at final drilling depth in revolutions

Dwell time for stock removal in seconds
DTS - (only for G 
code)
Dwell time for stock removal in revolutions

8.1.6

Boring (CYCLE86)

Function
With the "Boring" cycle, the tool approaches the programmed position in rapid traverse,
allowing for the retraction plane and safety clearance. It is then inserted into the workpiece at
the feedrate programmed under F until it reaches the programmed depth (Z1). There is an
oriented spindle stop with the SPOS command. After the dwell time has elapsed, the tool is
retracted either with or without lift of the tool.
For "lift off contour", the retraction distance D and the tool orientation angle α can either be
defined via machine data or in the parameter screen. If both parameters are pre-assigned
via machine data, they do not appear in the parameter screen.
NOTICE
The "Boring" cycle can be used if the spindle to be used for the boring operation is
technically able to go into position-controlled spindle operation.
Approach/retraction
1. The tool moves with G0 to safety clearance of the reference point.
2. Travel to the final drilling depth with G1 and the speed and feedrate programmed before
3. Dwell time at final drilling depth.
4. Oriented spindle hold at the spindle position programmed under SPOS.
5. With the "Lift" selection, the cutting edge retracts from the hole edge with G0 in up to
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Machine manufacturer
Please also refer to the machine manufacturer's instructions.
the cycle call.
three axes.
Programming technological functions (cycles)
8.1 Drilling
Unit
s
rev
s
rev
s
rev
273