Programming instructions

5-26

Tool Corrections NC Programming 17VRS

DOK-MTC200-NC**PRO*V17-ANW1-EN-P

Contour Transitions

With inside corners, the corrected NC-block transition point is based on

the point at which the lines parallel to the contours intersect.

S '

R theoretical edge tip

S edge center

S ' actual touch point

Fig. 5-13: Inside corners

The tool center point must travel around outside corners so that they are

not damaged.

Two methods can be used to accomplish this:

1. Insertion of an arc as the transition element by using NC-command

G43, and

2. Insertion of a chamfer as the transition element by using NC-com-

mand G44. A chamfer cannot be inserted unless the transition is

straight line

↔

straight line. A chamfer is used as the transition ele-

ment when the transition angle between the two straight lines is

greater than 90°. If the transition angle is less than 90°, the NC-block

transition point is recalculated based on the intersection point of the

lines parallel to the contour.

Inside corners

Outside corners