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4 - Fagor Automation

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1.<br />

MILLING CANNED CYCLES.<br />

General concepts<br />

CNC 8065<br />

(REF: 1209)<br />

·26·<br />

1.1.2 Starting plane and reference plane.<br />

Canned cycles (·M· model)<br />

There are two coordinates in the machining cycles along the longitudinal axis that are<br />

described next because they are important:<br />

Starting plane (Zi). Tool coordinate (position) when defining the cycle.<br />

Reference plane (Z). This plane is programmed in the cycle and represents a part<br />

approaching coordinate. This plane may be programmed in absolute or incremental<br />

coordinates, in which case, it will be referred to the reference plane.<br />

Functions G98 and G99 indicate where the tool returns after machining. Both functions are<br />

modal and G98 is assumed by default. These function may be used in the canned cycle<br />

calling block and in the blocks that are under its influence.<br />

G98 Return (withdraw) to the starting plane (Zi).<br />

G99 Return (withdraw) to the reference plane (Z).<br />

G99 G1 X0 Y0 (Movement)<br />

G81 Z I K (Defines and executes the drilling canned cycle)<br />

X1 Y1 (Move and drill)<br />

X2 Y2 (Move and drill)<br />

G98 X3 Y3 (Move and drill)<br />

G80 (Canned cycle cancellation)

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