HEIDENHAIN CNC Pilot 4290 - Manual (Page 104)

4 DIN PLUS 92
The peak-to-valley height applies only to
basic contour elements.
4.5.4 Help Commands for Contour Definition
Overview
G7 Precision stop ON
G8 Precision stop OFF
G9 Precision stop blockwise
G10 Influences finishing feed rate for total contour
G38 Influences finishing feed rate for basic contour elements block
by block
G39 Only for form elements:
■ Influences finishing feed rate
■ Additive compensation values
■ Equidistant finishing allowances
G52 Equidistant oversize - blockwise
G95 Defines finishing feed rate for total contour
G149 Additive compensation values for basic contour elements
Precision stop ON G7-Geo
Switches ”precision stop” on. It is a modal function. The block with G7
is run with precision stop. The CNC PILOT does not run the following
block until the tool reaches the position tolerance window around the
end point (for more on the tolerance window, see machine parameters
1106, 1156, ...).
Precision stop OFF G8-Geo
Switches the ”precision stop” off. The block programmed with G8 is
run without precision stop.
Blockwise precision stop G9 Geo
”Precision stop” for the NC block in which G9 is programmed (see
also ”G7 Geo”).
Peak-to-valley height (surface texture) G10 Geo
Influences the finishing feed rate of G890.
Parameters
H:
Type of surface texture (see also DIN 4768)
■ H=1: General roughness (profile depth) Rt1
■ H=2: Average roughness Ra
■ H=3: Mean roughness Rz
RH: Peak-to-valley height (µm, inch mode: µinch)
”Precision stop” is used for basic contour
elements that are executed with G890 or
G840.
Programming notes
■ G10 Geo is modal.
■ G95 Geo or G10 Geo without parameters switch
the peak-to-valley height off.
■ G10 RH... (without ”H”) overwrites the peak-to-
valley height blockwise.
■ G38 Geo overwrites the peak-to-valley height block
by block.
4.5 Geometry Commands
■ G10, G38, G52, G95 and G149 Geo
apply for basic contour elements (G1, G2,
G3, G12 and G13 Geo) – not for chamfers/
rounding arcs that are programmed in
connection with basic contour elements.
■ The auxiliary commands of the contour
description influence the finishing feed rate
of the Cycles G869 and G890 – not the
finishing feed rate in recessing cycles.