Feedrate For G331, G332 (Tapping Without Compensation Chuck); Feedrate For Chamfer/Rounding: Frc, Frcm - Siemens SINUMERIK 808D Function Manual

18.1.4

Feedrate for G331, G332 (tapping without compensation chuck)

Axis velocity
With respect to G331/G332 tapping, the axis velocity for the thread length results from the effective spindle speed S and the
programmed pitch. However, the maximum axis velocity defined in MD32000 MAX_AX_VELO cannot be exceeded.
The feedrate F is not relevant. It is, however, kept in the memory.
Interface signal
If the G331/G332 function is active, the IS "Tapping without compensation chuck active" (DB390x.DBX2002.3) is set for the
spindle.
Note
The tapping may only be carried out without a compensation chuck if an exact dynamic adjustment of the spindle and the
relevant axis has been performed. With G331/G332 the parameter set n (0...5) of the axis becomes effective automatically.
This parameter set also applies to the current gear stage of the spindle (M40, M41 to M45 - see also Chapter "Spindle (S1)
(Page 156)").
In general, the axis is adjusted to the slower spindle.
Reference:
SINUMERIK 808D/SINUMERIK 808D ADVANCED Programming and Operating Manual
18.1.5

Feedrate for chamfer/rounding: FRC, FRCM

Chamfer/rounding
You can insert the chamfer (CHF or CHR) or rounding (RND) elements into a contour corner. If you wish to round several
contour corners sequentially by the same method, use "Modal rounding" (RNDM).
You can program the feedrate for the chamfer/rounding with FRC=... (non-modal) or FRCM= ... (modal). If FRC/FRCM is not
programmed, the normal feedrate F is applied.
Programming
FRC=... Non-modal feedrate for chamfer/rounding
Value > 0:
FRCM=... Modal feedrate for chamfer/rounding
Value > 0:
Value = 0:
Notes
● F, FRC, FRCM are not active when a chamfer is traversed with G0. If the feedrate F is active for chamfer/rounding, it is
by default the value from the block which leads away from the corner. Other settings can be configured via machine data
MD20201 CHFRND_MODE_MASK.
● A maximum of three blocks without corresponding information may be put between two blocks containing traversing
information for chamfer/rounding (axes of the plane). In the case of more blocks without axis information in the plane and
existing instructions for inserting chamfer or rounding, an alarm is triggered.
Function Manual
01/2017
Feedrate in mm/min (G94) or mm/rev. (G95)
Feedrate in mm/min (G94) or mm/rev. (G95)
Modal feedrate for chamfer/rounding ON
Modal feedrate for chamfer/rounding OFF
Feedrate F applies to the chamfer/rounding
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