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5
Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling
5.2
RECTANGULAR POCKET (Cycle 251, DIN/ISO: G251)
Q202 Plunging depth? (incremental): Infeed per
cut; enter a value greater than 0. Input range 0 to
99999.9999
Q369 Finishing allowance for floor? (incremental):
Finishing allowance for the floor Input range 0 to
99999.9999
Q206 Feed rate for plunging?: Traversing speed of
the tool in mm/min when plunging to depth. Input
range 0 to 99999.999, alternatively FAUTO, FU, FZ
Q338 Infeed for finishing? (incremental): Infeed in
the spindle axis per finishing cut Q338=0: Finishing
in one infeed. Input range 0 to 99999.9999
Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface Input range
0 to 99999.9999; alternatively PREDEF
Q203 Workpiece surface coordinate? (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
Q204 2nd set-up clearance? (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999; alternatively PREDEF
Q370 Path overlap factor?: Q370 x tool radius
= stepover factor k. Input range: 0.1 to 1.414;
alternatively PREDEF
Q366 Plunging strategy (0/1/2)?: Type of plunging
strategy:
0: vertical plunging. The TNC plunges
perpendicularly, regardless of the plunging angle
ANGLE defined in the tool table
1: helical plunging. In the tool table, the plunging
angle ANGLE for the active tool must be defined as
not equal to 0. Otherwise, the TNC generates an
error message
2: reciprocal plunging. In the tool table, the plunging
angle ANGLE for the active tool must be defined as
not equal to 0. Otherwise, the TNC generates an
error message. The reciprocation length depends
on the plunging angle. As a minimum value the TNC
uses twice the tool diameter
PREDEF: The TNC uses the value from the GLOBAL
DEF block
134
NC blocks
8 CYCL DEF 251 RECTANGULAR
HEIDENHAIN | TNC 320 | User's manual for cycle programming | 9/2016
POCKET
Q215=0
;MACHINING
OPERATION
Q218=80
;FIRST SIDE LENGTH
Q219=60
;2ND SIDE LENGTH
Q220=5
;CORNER RADIUS
Q368=0.2
;ALLOWANCE FOR SIDE
Q224=+0
;ANGLE OF ROTATION
Q367=0
;POCKET POSITION
Q207=500
;FEED RATE FOR
MILLNG
Q351=+1
;CLIMB OR UP-CUT
Q201=-20
;DEPTH
Q202=5
;PLUNGING DEPTH
Q369=0.1
;ALLOWANCE FOR
FLOOR
Q206=150
;FEED RATE FOR
PLNGNG
Q338=5
;INFEED FOR FINISHING
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