HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 212)

212 DIN programming
4.5 At
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Attributes for superimposed elements G39-Geo
G39 influences the finishing feed rate of G890 with the form
elements:
 Chamfers/rounding arcs (for connecting basic elements)
 Undercuts
 Recesses
Affected machining: Special feed rate, surface roughness, additive D
compensation, equidistant oversizes.
Parameters
F
Feed per revolution
V Type of surface roughness (see also DIN 4768)
 1: General surface roughness (profile depth) Rt1
 2: Surface roughness Ra
 3: Surface roughness Rz
RH Surface roughness [µm, inch mode: µinch]
D Number of the additive compensation (901 <= D <= 916)
P Oversize (radius)
H P applies as an absolute or additive value (default: 0)
 0: P replaces G57/G58 oversizes
 1: P is added to G57/G58 oversizes
E Special feed factor (default: 1)
Special feed rate = active feed rate * E
 Use surface roughness (V, RH), finishing feed rate (F)
and special feed rate ("E") alternately!
 G39 is a non-modal function.
 Program G39 before the contour element for which it is
intended.
 G50 preceding a cycle (MACHINING section) cancels a
finishing oversize programmed for that cycle with G39.
Function G39 can be replaced by directly entering the
attributes in the contour elements dialog. The function is
necessary to execute imported programs correctly.