Feed rate reduction factor g38-geo, Attributes for superimposed elements g39-geo – HEIDENHAIN CNC Pilot 4290 V7.1 User Manual
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HEIDENHAIN CNC PILOT 4290
165
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Feed rate reduction factor G38-Geo
G38 activates the special feed rate for the finishing cycle G890. The
“special feed rate” applies only to basic contour elements.
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
E
Special feed factor (default: 1)
Special feed rate = active feed rate * E (0 < E <= 1)
G38 is a non-modal function.
Program G38 before the contour element for which it is
intended.
G38 replaces another special feed rate or programmed
surface roughness.
Parameters
F
Feed per revolution
V
Type of surface roughness (see also DIN 4768)
V=1: General surface roughness (profile depth) Rt1
V=2: Surface roughness Ra
V=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)
H=0: P replaces G57-/G58 oversizes
H=1: P is added to G57-/G58
E
Special feed factor (default: 1)
Special feed rate = active feed rate * E (0 < E <= 1)