To Next Page

To Previous Page

Commands Calling Axis Movements

2.2 Reference point return

04.07

2-34

SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition

2.2 Reference point return

2.2.1 Automatic return to reference point (G28)

Format

G28 X... Y... Z... ;

With the commands of “G28 X ⋅⋅⋅ Y ⋅⋅⋅ Z ⋅⋅⋅ ;”, the numerically controlled axes

are returned to the reference point. The axes are first moved to the specified posi-

tion at a rapid traverse rate and then to the reference point automatically. This

reference point return operation is possible in up to simultaneous 3-axis control.

The axes not designated in the G28 block are not returned to the reference point.

Reference position

The reference position refers to a fixed position The position o f the tool can easily

be referenced by means of the reference position return function. This could, for

instance, be used as the tool change position. A total of four reference positions

can be determined by setting the coordinates using MD $_MA_REFP_SET_POS[0]

to [3]).

Example of programming:

Z-axis

Positioning

Start

point

Reference point

(A fixed point in the machine)

Z-axis deceleration LS

Reference point return operation

Intermediate positioning point

Y-axis deceleration LS

Y-axis

(G90/G91) G28 X ⋅⋅⋅ Y ⋅⋅⋅ Z ⋅⋅⋅;

Fig. 2-9 Automatic reference point return

Siemens SINUMERIK 802D sl Programming Manual

Other manuals for Siemens SINUMERIK 802D sl