Operation Manual

HEIDENHAIN CNC PILOT 640 217
4.5 Recessing cycles
Type of machining for technology database access: Contour
recessing
Cycle run
1 Calculate the recess positions and the proportioning of cuts
2 Approach the workpiece for next recess from starting point or from
last recess on paraxial path
3 Move at the programmed feed rate to the contour end point Z2
4 Remain at this position for dwell time EZ
5 Retract and approach for next pass
6 Repeat 3 to 5 until the complete recess has been machined
7 Repeat 2 to 6 until all recesses have been machined
8 Return to starting point on paraxial path
9 Move to the tool change point according to the G14 setting
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