HEIDENHAIN TNC 640 (34059x-02) Cycle programming - Manual (Page 340)

Cycles: Turning
13.18 RECESSING CONTOUR RADIAL
(Cycle 840, DIN/ISO: G840)
13
340
TNC 640 | User's Manual Cycle Programming | 5/2013
Finishing feed rate Q505: Feed rate during
finishing. If M136 has been programmed, the
value is interpreted by the TNC in millimeters per
revolution, without M136 in millimeters per minute.
Cutting limit Q479: Activate cutting limit:
0 : No cutting limit active
1 : Cutting limit (
Q480/Q482)
Limit value for diameter Q480: X value for contour
limitation (diameter value)
Limit value Z Q482: Z value for contour limitation
Maximum cutting depth Q463: Maximum infeed
(radius value) in radial direction. The infeed is divided
evenly to avoid abrasive cuts.
Machining direction Q507: Cutting direction:
0 : bidirectional (in both directions)
1 : unidirectional (in contour direction)
Offset width Q508: Reduction of cutting length.
After clearance roughing, the remaining material
is removed with a single cut. If required, the TNC
limits the programmed offset width.
Turning depth compensation Q509: Depending
on factors such as workpiece material or feed rate,
the tool tip is displaced during a turning operation.
You can correct the resulting infeed error with the
turning depth compensation factor.
NC blocks
9 CYCL DEF 14.0 CONTOUR
10 CYCL DEF 14.1 CONTOUR LABEL2
11 CYCL DEF 840 RECESS TURNG,
RADIAL
Q215=+0 ;MACHINING OPERATION
Q460=+2 ;SAFETY CLEARANCE
Q478=+0.3 ;ROUGHING FEED RATE
Q488=+0 ;PLUNGING FEED RATE
Q483=+0.4 ;OVERSIZE FOR
DIAMETER
Q484=+0.2 ;OVERSIZE IN Z
Q505=+0.2 ;FINISHING FEED RATE
Q479=+0 ;CUTTING LIMIT
Q480=+0 ;LIMIT VALUE FOR
DIAMETER
Q482=+0 ;LIMIT VALUE IN Z
Q463=+2 ;MAX. CUTTING DEPTH
Q507=+0 ;MACHINING DIRECTION
Q508=+0 ;OFFSET WIDTH
Q509=+0 ;DEPTH COMPENSATION
12 L X+75 Y+0 Z+2 FMAX M303
13 CYCL CALL
14 M30
15 LBL 2
16 L X+60 Z-10
17 L X+40 Z-15
18 RND R3
19 CR X+40 Z-35 R+30 DR+
18 RND R3
20 L X+60 Z-40
21 LBL 0