Operation Manual

HEIDENHAIN MANUALplus 620 179
4.4 Turning cycles
Type of machining for technology database access: Roughing
Cycle run
1 Calculate the proportioning of cuts (infeed), taking the workpiece
blank oversize J and the type of cutting lines H into account
 J=0: The cutting geometry is taken into account. This may result
in the use of different infeeds for the longitudinal and transverse
directions.
 J>0: The same infeed is used for both the longitudinal and the
transverse direction.
2 Approach the workpiece from starting point for first pass
3 Machine the workpiece according to the calculated proportioning
of cuts
4 Return and approach for next pass
5 Repeat 3 to 4 until the defined area has been machined
6 Return to starting point on paraxial path
7 Move to the tool change point according to the G14 setting
G47 Safety clearance (see page 128)
G14 Tool change point (see page 128)
T Turret pocket number
ID Tool ID number
S Spindle speed/cutting speed
F Feed per revolution
BP Break duration: Time span for interruption of the feed. The
chip is broken by the (intermittent) interruption of the feed.
BF Feed duration: Time interval until the next break. The chip
is broken by the (intermittent) interruption of the feed.
A Approach angle (reference: Z-axis)—(default: parallel
to Z axis)
W Departure angle (reference: Z axis)—(default: orthogonal
to Z axis)
XA, ZA Starting point of blank (only effective if no blank was
programmed):
 XA, ZA not programmed: The workpiece blank contour
is calculated from the tool position and the ICP contour.
 XA, ZA programmed: Definition of the corner point of
the workpiece blank
MT M after T: M function that is executed after the tool call T
MFS M at beginning: M function that is executed at the
beginning of the machining step
MFE M at end: M function that is executed at the end of the
machining step
WP Displays which workpiece spindle is used to process the
cycle (machine-dependent)
 Main drive
 Opposing spindle for rear-face machining