Siemens sinumerik 808d Programming And Operating Manual page 158

Cycles
2.5 Turning cycles
● Selection of the cutter radius compensation according to the active tool point direction
● Retraction to the starting point with G0 and deselection of the cutter radius compensation
Explanation of the parameters
SPD and SPL (starting point)
Use the parameter SPD to specify the finished part diameter for the undercut. The SPL
parameter defines the finished dimension in the longitudinal axis.
If a final diameter of <3 mm results for the value programmed for SPD, the cycle is canceled,
and alarm 61601 "Finished part diameter too small" is issued.
FORM (definition)
Form E and form F are fixed in DIN509 and must be defined using this parameter.
If the parameter has a value other than E or F, the cycle aborts and creates alarm 61609
"Form defined incorrectly".
158
and traveling along the undercut contour at the feedrate programmed prior to the cycle
call
with G40
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0