Siemens SINUMERIK 808D User Manual page 177

Fu n ction
The cycle supports boring of holes with a boring bar.
The tool drills at the programmed spindle speed and feedrate velocity up to the entered drilling depth.
With drilling 2, oriented spindle stop is activated once the drilling depth has been reached. Then, the programmed retraction
positions are approached in rapid traverse, and from there the retraction plane is approached.
Se quence
Po sition reached prior to cycle start:
The drilling position is the position in the two axes of the selected plane.
Th e cycle creates the following sequence of motions:
● Approaching the position of safety distance relative to the reference plane with G0
● Traversing to final drilling depth with G1 and the feedrate programmed prior to the cycle call
● Dwell time to final drilling depth
● Oriented spindle stop at the spindle position programmed under POSS
● Traverse retraction path in up to three axes with G0
● Retracting in the drilling axis to the position of safety distance relative to the reference plane with G0
● Retracting to the retraction plane with G0 (initial drilling position in both axes of the plane)
Explanation of the parameters
For more information about the parameters RTP, RFP, SDIS, DP, DPR, see Section "Drilling, centering - CYCLE81
(Page 157)".
D TB (dwell time)
The dwell time to the final drilling depth (chip breakage) is programmed under DTB in seconds.
SD IR (direction o f rotation)
With this parameter, you determine the direction of rotation with which boring is performed in the cycle. If values other than 3
or 4 (M3/M4) are generated, alarm 61102 "No spindle direction programmed" is generated and the cycle is not executed.
R PA (retraction path along the first axis)
Use this parameter to define a retraction movement along the first axis (abscissa), which is executed after the final drilling
depth has been reached and oriented spindle stop has been performed.
Programming and Operating Manual (Milling)
177
6FC5398-4DP10-0BA6, 09/2017