Smithy CNC Mills Bedienungsanleitung PDF herunterladen (Seite 88)

In both examples, the shaded triangle represents material which should remain

after cutting, and the line outside the shaded triangle represents the path of the

tip of a cutting tool. Both paths will leave the shaded triangle uncut. The one on

the left (with rounded corners) is the path the interpreter will generate. In the

method on the right (the one not used), the tool does not stay in contact with

the shaded triangle at sharp corners.

Figure 9-2

Radius

Compensation

Z axis motion ma

y tak

e place whi

le the contour is being followed in the XYplane.

Portions of the contour may be skipped by retracting the Z axis above the part,

following the contour to the next point at which machining should be done, and

e-extending the Z-axis. These skip motions may be performed at feed rate (G1)

or at traverse rate (G0). Inverse time feed rate (G93) or units per minute feed

rate (G94) may be used with cutter radius compensation. Under G94, the feed

ate wi

l apply to the actual path of the cutter tip, not to the programmed con-

tour

Programming Instructions

* To start cutter radius compensation, program either G41 (for keeping the tool

to the left of the contour) or G42 (f

or keeping the tool to the right of the con-

tour). In Figure 7, for example, if G41 were programmed, the tool would stay

left and mo

e clockwise ar

ound the triangle, and i

f G42 wer

e pr

ogr

ammed, the

tool would stay right and move counterclockwise around the triangle.

SmithyCNC Programmer’s Reference Manual: Tool File & Compensation

SmithyCNC Programmer’s Reference Manual: Tool File and Compensation

9-6

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Smithy CNC Mills Bedienungsanleitung Seite 88