Milltronics PL-551 Informacje Techniczne Pobierz pdf (Strona 283)

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101

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)

G89

Note: The initial level means the value of the Z axis when the canned cycle is first turned on.

The figure below shows how to specify data in G90 or G91 mode.

Absolute and Incremental Programming

If the tool is to be returned to point R or to the initial level, it is specified by G98 or G99. (See

figure below.) Use G99 for the first hole, and use G98 for the last hole. When the canned cycle is

repeated in G98 mode, the tool is returned to the initial level after each hole.

In the G99 mode the initial level does not change, and the tool is returned to the R point after

each hole.

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