Thread Undercut - Cycle96 - Siemens SINUMERIK User Manual

CON02_E:;************* CONTOUR ENDS ************
12.5.6

Thread undercut - CYCLE96

Programming
CYCLE96 (DIATH, SPL, FORM, VARI)
Parameters
Parameter Data type
DIATH REAL
SPL REAL
FORM CHAR
VARI INT
Function
You can use this cycle to perform thread undercuts to DIN76 for parts with a metrical ISO thread.
See the following illustration for CYCLE96:
Sequence
Position reached prior to cycle start:
The starting position is any position from which each thread undercut can be approached without collision.
The cycle creates the following sequence of motions:
● Approach of the starting point determined in the cycle by using G0
● Selection of the tool radius compensation according to the active tool point direction. Traversing along the undercut
contour using the feedrate programmed before the cycle was called
● Retraction to the starting point with G0 and deselection of the tool radius compensation with G40
200
Description
Nominal diameter of the thread
Starting point of the correction in the longitudinal axis
Definition of the form
Values: A (for form A), B (for form B), C (for form C), D (for form D)
Specification of undercut position
Values:
0: According to tool point direction
1...4: Define position
Programming and Operating Manual (Turning)
01/2017