Operation Manual

HEIDENHAIN CNC PILOT 640 243
4.5 Recessing cycles
Type of machining for technology database access: Recess turning
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 proportioning of cuts
2 Approach the workpiece from starting point for first pass
3 Execute the first cut (recessing)
4 Machine perpendicularly to recessing direction (turning)
5 Repeat 3 to 4 until contour end point X2, Z2 is reached
6 Machine chamfer/rounding at contour start / contour end if defined
7 Return to starting point on paraxial path
8 Move to the tool change point according to the G14 setting
WP Displays which workpiece spindle is used to process the
cycle (machine-dependent)
 Main drive
 Opposing spindle for rear-face machining