HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 220)

220 DIN Programming
4.5 At
tr
ibut
es f
o
r cont
our descr
iption
4.5 Attributes for contour
description
Feed rate reduction G38-Geo
G38 activates the special feed rate for the finishing cycle G890. The
special feed rate applies to basic contour elements and form
elements. It is a modal function.
Overview of attributes for contour description
G38 Special feed factor for basic elements and
form elements—modal Page 220
G52 Equidistant oversize for basic elements and
form elements—modal Page 222
G95 Finishing feed rate for basic elements and
form elements—modal Page 223
G149 Additive compensation for basic elements and
form elements—modal Page 223
 Once programmed, G38-, G52-, G95- and G149-Geo
remain in effect for all contour elements until the
function is programmed again without defining
parameters.
 For form elements, you can program different attributes
directly in the definition of the form element (see
„Machining attributes for form elements” on page 201).
 The attributes for contour description influence the
finishing feed rate of the Cycles G869 and G890, not the
finishing feed rate in recessing cycles.
Parameters
E
Special feed factor (default: 1)
Special feed rate = active feed rate * E
 G38 is a modal function.
 Program G38 before the contour element for which it is
intended.
 G38 replaces a special feed rate.
 To cancel the special feed factor, program G38 without
parameters.