
1. MACHINING PROGRAMS FOR
2–AXES (X AND Z AXIS) LATHES
B–62444E–1/04
TYPES OF MACHINING
PROGRAMS
314
MD
(Cutting start point)
(Cutting end point)
W
Ex
Ez
MD : Depth of cut per pass in rough machining. The formulas
below are used to determine the average depth of cut per
pass.
N (CUT COUNT) = ((END REMOVAL) – (FINISHING
AMNT))/(CUTTING DEPTH):
The fractional part is rounded up to an integer.
MD (CUT DPTH) = ((END REMOVAL) – (FINISHING
AMNT))/N
ED : X coordinate (parameter No. 9807: Diameter) where the feed
amount for end facing is reduced. From the cutting start
point (CX) to ED, the workpiece is cut according to the
cutting feed amount specified on the program screen. From
ED to the cutting end point (EX), the workpiece is cut
according to the cutting feed amount with the feed amount
override near the center (parameter No. 9808) applied.
EX : Absolute X coordinate of a cutting end point (detail data
screen)
FZ : Finishing allowance for end facing (detail data screen)
Ex : Clearance (parameter No. 9797: Diameter) along the X–axis
for end facing
Ez : Clearance (parameter No. 9798: Diameter) along the Z–axis
for end facing
NOTE
In end facing, a general–purpose end facing tool is
automatically selected. When a general–purpose outer
surface machining tool is to be used for end facing, the tool
must be registered as a general–purpose end facing tool in
the tool file. In this case, the same tool can also be
registered as a general–purpose outer surface machining
tool by using the same T code.
1.4.3
Details of End Facing