Cycle Parameters - HEIDENHAIN TNC 640 User Manual

12

Cycle parameters

Q471 Thread position (0=ext./1=int.)?: Define
the position of the thread:
0: External thread
1: Internal thread
Q460 Setup clearance?: Set-up clearance in radial
and axial direction. In axial direction, the set-up
clearance is used for acceleration (approach path)
to the synchronized feed rate.
Q491 Thread diameter?: Define the nominal
diameter of the thread.
Q472 Thread pitch?: Pitch of the thread
Q473 Thread depth (radius)? (incremental):
Depth of the thread. If you enter 0, the depth is
assumed for a metric thread based on the pitch
Q492 Contour start in Z?: Z coordinate of the
starting point
Q494 Contour end in Z?: Z coordinate of the end
point including the runout of the thread Q474.
Q474 Length of thread runout? (incremental):
Length of the path on which, at the end of the
thread, the tool is lifted from the current plunging
depth to the thread diameter Q460.
Q463 Maximum cutting depth?: Maximum
plunging depth in radial direction relative to the
radius.
Q467 Feed angle?: Angle at which the Q463
infeed is performed. The reference angle is formed
by the perpendicular to the rotary axis.
Q468 Infeed type (0/1)?: Define the type of
infeed:
0: Constant chip cross section (infeed lessens with
depth)
1: Constant plunging depth
Q470 Starting angle?: Angle of the turning spindle
at which the thread start is to be made.
Q475 Number of thread grooves?: Number of
thread grooves
Q476 Number of air cuts?: Number of air cuts
without infeed at finished thread depth
466
Cycles: Turning | THREAD LONGITUDINAL
(Cycle 831, DIN/ISO: G831)
Q494
Q473
=0 ISO 1502
Ø Q491
NC blocks
11 CYCL DEF 831 THREAD
LONGITUDINAL
Q471=+0 ;THREAD POSITION
Q460=+5 ;SAFETY CLEARANCE
Q491=+75 ;THREAD DIAMETER
Q472=+2 ;THREAD PITCH
Q473=+0 ;DEPTH OF THREAD
Q492=+0 ;CONTOUR START IN Z
Q494=-15 ;CONTOUR END IN Z
Q474=+0 ;THREAD RUN-OUT
Q463=+0.5 ;MAX. CUTTING DEPTH
Q467=+30 ;ANGLE OF INFEED
Q468=+0 ;TYPE OF INFEED
Q470=+0 ;STARTING ANGLE
Q475=+30 ;NUMBER OF STARTS
Q476=+30 ;NUMBER OF AIR CUTS
12 L X+80 Y+0 Z+2 FMAX M303
13 CYCL CALL
HEIDENHAIN | User's manual for cycle programming | 10/2017
Q492
Q472
Q460
Q467
Q463