Fixed Point Approach (G74/G75) - Siemens SINUMERIK 808D User Manual

SP Start point of circle
CP Center point of circle
EP End point of circle
I Incremental distance from SP to CP in X axis
J Incremental distance from SP to CP in Y axis
G2 Traversing direction of the circle (clockwise)
G3 Traversing direction of the circle (counter-clockwise)
For more information, see Section "Circular interpolation: G2, G3 (Page 93)".
7.2.3.7 Fix ed point approach (G74/G75)
D e scription
G7 4 :
By using G74, reference point can be approached automati-
cally.
G7 5 :
By using G75, a fixed point on the machine defined by the
manufacturer can be approached automatically.
For more information, see Section "Fixed point approach (Page 104)".
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
Programming example
N10 G17 G90 G500 G71
N20 T1 D1 M6
N30 S5000 M3 G94 F300
N40 G00 X50 Y50 Z5
N50 G01 Z-5
N60 Z5
N70 G7 4 Z=0 ;reference point
N10 G17 G90 G500 G71
N20 T1 D1 m6
N30 S5000 M3 G94 F300
N40 G00 X50 Y50 Z5
N50 G01 Z-5
N60 Z5
N70 G7 4 Z=0 ;reference point
N80 G7 5 X=0 ;fixed point
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