Cycles
2.5 Turning cycles
Turning Part 2: Programming (Siemens instructions)
146 Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
2.5.2 Cutoff - CYCLE92
Programming
CYCLE92(SPD, SPL, DIAG1, DIAG2, RC, SDIS, SV1, SV2, SDAC, FF1, FF2, SS2, 0, VARI,
1, 0, AMODE)
Parameters
Parameter Data type Description
SPD REAL Starting point in the transverse axis (absolute, always diameter)
SPL REAL Starting point in the longitudinal axis (absolute)
DIAG1 REAL Depth for speed reduction ∅ (absolute)
DIAG2 REAL Final depth ∅ (absolute)
RC REAL Chamfer width or rounding radius
SDIS REAL Safety clearance (to be added to the reference point; enter without
sign)
SV1 REAL Contant cutting rate V
SV2 REAL Maximum speed at constant cutting speed
Direction of spindle rotation SDAC INT
Values: 3: M3
4: M4
FF1 REAL Infeed as far as depth for speed reduction
FF2 REAL Reduced infeed as far as final depth
SS2 REAL Reduced spindle speed as far as final depth
PSYS INT Internal parameter; only the default value 0 is possible
Machining type VARI INT
Values: 0: Retraction to the reference plane brought forward
by SPD and SDIS
1: No retraction at the end
PSYS INT Internal parameter; only the default value 1 is possible
PSYS INT Internal parameter; only the default value 0 is possible
Alternate mode: radius or chamfer AMODE INT
Values: 10000: radius
11000: chamfer
Function
The "Cutoff" cycle is used to cut off balanced parts (for example, screws, bolts, or pipes)
dynamically.
You can program a chamfer or rounding on the edge of the machined part. You can machine
at a constant cutting rate V or speed S up to a depth DIAG1, from which point the workpiece
is machined at a constant speed. As of depth DIAG2, you can also program a reduced
feedrate FF2 or a reduced speed SS2, in order to adapt the velocity to the smaller diameter.
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