Straight Line Lp; Circular Path Cp Around Pole Cc - HEIDENHAIN TNC 426 B User Manual

Straight line LP

The tool moves in a straight line from its current position to the
straight-line end point. The starting point is the end point of the
preceding block.
Polar-coordinates radius PR: Enter the distance from
the pole CC to the straight-line end point.
Polar-coordinates angle PA: Angular position of the
straight-line end point between –360° and +360°
The sign of PA depends on the angle reference axis:
Angle from angle reference axis to PR is
counterclockwise: PA>0
Angle from angle reference axis to PR is clockwise:
PA<0
Example NC blocks
12 CC X+45 Y+25
13 P PR+30 PA+0 RR F300 M3
14 P PA+60
15 P IPA+60
16 P PA+180

Circular path CP around pole CC

The polar coordinate radius PR is also the radius of the arc. It is
defined by the distance from the starting point to the pole CC. The
last programmed tool position before the CP block is the starting
point of the arc.
Polar coordinates angle PA: Angular position of the
arc end point between –5400° and +5400°
Direction of rotation DR
Example NC blocks
18 CC X+25 Y+25
19 P PR+20 PA+0 RR F250 M3
20 CP PA+180 DR+
For incremental coordinates, enter the same sign for DR
and PA.
HEIDENHAIN TNC 426 B, TNC 430
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Y
60°
25
CC
45
Y
25
CC
25
60°
X
X
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