Operation Manual

HEIDENHAIN CNC PILOT 640 223
4.5 Recessing cycles
Type of machining for technology database access: Contour
recessing
Cycle run
1 Calculate the recess positions
2 Approach the workpiece for next recess from starting point or from
last recess on paraxial path
3 Finish first side and the contour valley up to position just before
recess end point
4 Approach workpiece for finishing the second side on paraxial path
5 Finish the second side and the remainder of the contour valley
6 Repeat 2 to 5 until all recesses have been machined
7 Return to starting point on paraxial path
8 Move to the tool change point according to the G14 setting
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