Operation Manual

HEIDENHAIN CNC PILOT 640 201
4.4 Turning cycles
Type of machining for technology database access: Roughing
Cycle run
1 calculates the proportioning of cuts (infeed)
2 Approach the workpiece from starting point for first pass on
paraxial path
3 For sloping contours, plunge into the material at reduced feed rate
4 Machine the workpiece according to the calculated proportioning
of cuts
5 The contour is machined depending on the contour smoothing H
6 Return and approach for next pass
7 Repeat 3 to 6 until the defined area has been machined
8 Return to starting point on paraxial path
9 Move to the tool change point according to the G14 setting
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