HEIDENHAIN TNC 320 (34055x-06) Cycle programming - Manual (Page 141)

CIRCULAR STUD (Cycle 257, DIN/ISO: G257) 5.7
5
TNC 320 | User's Manual Cycle Programming | 5/2013
141
Danger of collision!
Use the machine parameter displayDepthErr to
define whether, if a positive depth is entered, the
TNC should output an error message (on) or not (off).
Keep in mind that the TNC reverses the calculation
for pre-positioning when a
positive depth is
entered . This means that the tool moves at rapid
traverse in the tool axis to set-up clearance below
the workpiece surface!
Leave enough room next to the stud for the approach
motion. Minimum: tool diameter + 2 mm
At the end, the TNC positions the tool back to the
set-up clearance, or to the 2nd set-up clearance
if one was programmed. This means that the end
position of the tool after the cycle differs from the
starting position.
Cycle parameters
Finished part diameter Q223: Diameter of
the completely machined stud. Input range 0 to
99999.9999
Workpiece blank diameter Q222: Diameter of
the workpiece blank. Enter the workpiece blank
diameter greater than the finished diameter. The
TNC performs multiple stepovers if the difference
between the workpiece blank diameter and finished
diameter is greater than the permitted stepover (tool
radius multiplied by path overlap
Q370). The TNC
always calculates a constant stepover. Input range 0
to 99999.9999
Finishing allowance for side Q368 (incremental):
Finishing allowance in the working plane. Input
range 0 to 99999.9999
Feed rate for milling Q207: Traversing speed of
the tool in mm/min while milling. Input range 0 to
99999.999 alternatively
FAUTO, FU, FZ
Climb or up-cut Q351: Type of milling operation
with M3
+1 = climb
–1 = up-cut
PREDEF: The TNC uses the value from the GLOBAL
DEF block
Depth Q201 (incremental): Distance between
workpiece surface and bottom of stud. Input range
-99999.9999 to 99999.9999
Plunging depth Q202 (incremental): Infeed per
cut. Enter a value greater than 0. Input range 0 to
99999.9999