Operation Manual

HEIDENHAIN CNC PILOT 640 227
4.5 Recessing cycles
Type of machining for technology database access: Contour
recessing
By setting the following optional parameters, you can define
additional contour elements:
 A:Oblique cut at contour start
 W:Oblique cut at contour end
 R:Rounding arc (in both corners of contour valley)
 B1:Chamfer/Rounding at contour start
 B2:Chamfer/Rounding at contour end
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 (taking the optional contour elements into account)
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 second side, taking optional contour elements into account;
then finish remainder of contour valley
6 Repeat 2 to 5 until all recesses have been finished
7 Return to starting point on paraxial path
8 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