HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 43)

27 HEIDENHAIN TNC 410, TNC 426, TNC 430
Example 1
A hole with a depth of 20 mm is to be drilled into a single
workpiece. After clamping and aligning the workpiece and setting
the datum, you can program and execute the drilling operation in a
few lines.
First you pre-position the tool with G00 and G01 blocks (straight-line
blocks) to the hole center coordinates at a setup clearance of 5 mm
above the workpiece surface. Then drill the hole with Cycle G83
PECKING.
%$MDI G71 *
N10 G99 T1 L+0 R+5 *
N20 T1 G17 S2000 *
N30 G00 G40 G90 Z+200 *
N40 X+50 Y+50 M3 *
N50 G01 Z+2 F2000 *
N60 G83
P01 +2
P02 -20
P03 +10
P04 0.5
P05 250 *
N70 G79 *
N80 G00 G40 Z+200 M2 *
N99999 %$MDI G71 *
The straight-line function is described in section 6.4 ”Path Contours
— Cartesian Coordinates,” the G83 PECKING cycle in section 8.3
”Drilling Cycles.”
Define tool: zero tool, radius 5
Call tool: spindle axis Z,
Spindle speed 2000 rpm
Retract tool (rapid traverse)
Move the tool at rapid traverse to a position above the
hole. Spindle on.
Position tool to 5 mm above hole
Define Cycle G83 PECKING:
Setup clearance of the tool above the hole
Total hole depth (Algebraic sign=working direction)
Depth of each infeed before retraction
Dwell time in seconds at the hole bottom
Feed rate for pecking
Call Cycle G83
Retract tool
End of program
3.1 Programming and Executing Simple Machining Operations
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