Boring (Cycle86); Function - Siemens SINUMERIK 840D sl Operating Manual

8.1.6

Boring (CYCLE86)

8.1.6.1

Function

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.
Note
If, for example, swiveling of mirroring has been performed with CYCLE800 before machining,
the SPOS command must be adapted so that the spindle position acts synchronously with
DX and DY.
Lift
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.
Note
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, 03/2013, 6FC5398-7CP40-3BA1
Machine manufacturer
Please refer to the machine manufacturer's specifications.
the cycle call.
three axes.
Programming technological functions (cycles)
8.1 Drilling
309