Siemens SINUMERIK 840DE Programming Manual page 90

Positional Data
3.5 Special turning functions
Parameters
DIAMON
DIAMOF
DIAM90
Further information
The commands for diameter and radius data are modal.
By programming DIAMOF you can switch at any time to radius as dimension.
Diameter values (DIAMON/DIAM90)
Diameter values apply to the following data:
• Actual-value display of transverse axis in the workpiece coordinate system
• JOG mode: Increments for incremental dimension and travel with handwheel
• Programming:
• Actual values read in the workpiece coordinate system in
Example
N10 G0 X0 Z0
N20 DIAMOF
N30 G1 X30 S2000 M03 F0.7
N40 DIAMON
N50 G1 X70 Z-20
N60 Z-30
N70 DIAM90
N80 G91 X10 Z-20
N90 G90 X10
N100 M30
3-16
End positions, independent of G90/G91 interpolation parameters inG2/G3, if these are
programmed with AC absolutely
MEAS, MEAW, $P_EP[X], $AA_IW[X] (see PGA, Programming Guide "Advanced")
Absolute dimensioning (G90)
Diameter
Radius (for default, see
machine manufacturer)
Diameter
The diameter programming is set with DIAM90 for G90 and
the radius programming for G91.
Approach starting point
Diameter input off
X axis = transverse axis; radius
dimensions active
Traverse to radius position X30
Diameter dimensions active
Traverse to diameter position X70 and
Z–20
Diameter programming for absolute
dimensions and radius programming for
incremental dimensions
Incremental dimension
Absolute dimensions
; End of program
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Incremental dimensioning
(G91)
Diameter
Radius
Radius
Fundamentals