HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 199)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
199
4.3 Basic cont
our elements
Circular arc of turning contour G12/G13-Geo
G12/G13 defines a circular arc in a contour with absolute center
dimensioning. Direction of rotation (see help graphic):
 G12: In clockwise direction
 G13: In counterclockwise direction
Example: G12-, G13-Geo
Parameters
X End point of contour element (diameter value)
Z End point of contour element
I Center (radius dimension)
K Center
R Radius
Q Point of intersection. End point if the circular arc intersects a
line segment or another circular arc (default: 0):
 0: Near point of intersection
 1: Far point of intersection
BR Chamfer/rounding. Defines the transition to the next contour
element. When entering a chamfer/rounding, program the
theoretical end point.
 No entry: Tangential transition
 BR=0: No tangential transition
 BR>0: Rounding radius
 BR<0: Width of chamfer
BE, BF, BD, BP and BH (see "Machining attributes for form elements"
on page 195)
FP
Do not machine element (only necessary for TURN PLUS):
 0: Do not machine basic element (straight line)
 1: Do not machine overlay element (e.g. chamfer or rounding)
 2: Do not machine basic/overlay element
Programming X, Z : Absolute, incremental, modal or "?"
. . .
FINISHED PART
N1 G0 X0 Z-10
. . .
N7 G13 Xi-15 Zi15 R20 Target point (incremental) and radius
N8 G12 X? Z? R15 Only the radius is known
N9 G13 X25 Z-30 R30 BR10 Q1
Rounding arc in transition and selection of
intersections
N10 G13 X5 Z-10 I22.3325 K-12.584
Target point and center, absolute
. . .