HEIDENHAIN TNC 407 (280 580) ISO Programming User Manual
Page 194
7-5
TNC 426/TNC 425/TNC 415 B/TNC 407
7
Programming with Q Parameters
Q Parameters in Place of Numerical Values
Example for exercise: Full circle
Circle center I, J:
X
= 50 mm
Y
= 50 mm
Beginning and end
of circular arc C:
X
= 50 mm
Y
=
0 mm
Milling depth:
Z
M
= –5 mm
Tool radius:
R
= 15 mm
–5
50
50
Y
X
Z
CC
Part program without Q parameters
%S520I G71 * ............................................................ Start of program
N10 G30 G17 X+1 Y+1 Z–20 * .................................. Blank form MIN point
N20 G31 G90 X+100 Y+100 Z+0 * ............................ Blank form MAX point
N30 G99 T6 L+0 R+15 * ............................................ Define tool
N40 T6 G17 S1500 * .................................................. Call tool
N50 G00 G40 G90 Z+100 M06 * ............................... Retract and insert tool
N60 X+50 Y–40 * ....................................................... Pre-position in the working plane
N70 Z5 M03 * ............................................................ Move tool to working depth
N80 I+50 J+50 * ........................................................ Coordinates of the circle center
N90 G01 G41 X+50 Y+0 F100 * ................................ Move to first contour point with radius compensation at
machining feed rate
N100 G26 R10 * ........................................................ Soft (tangential) approach
N110 G02 X+50 Y+0 * ............................................... Mill arc around circle center I, J;
negative rotation; coordinates of end point
X = +50 mm and Y = +0
N120 G27 R10 * ........................................................ Soft (tangential) departure
N130 G00 G40 X+50 Y–40 * ...................................... Depart contour, cancel radius compensation
N140 Z+100 M02 * .................................................... Retract in the infeed axis
N99999 %S520I G71 *
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