HEIDENHAIN CNC Pilot 4290 Pilot User Manual

Page 23

Peak-to-valley height (surface texture)
G10-Geo

G10 influences the finishing feed rate of G890 and
thus determines the surface roughness of the
workpiece.

Basics of programming

■

The peak-to-valley height activated with G10 is mo-

dal.

■

G10 without parameters deactivates peak-to-valley

height.

■

G95 Geo deactivates peak-to-valley height.

■

G10 RH... (without ”H”) overwrites the valid peak-

to-valley roughness block by block.

■

G38 Geo overwrites the valid peak-to-valley

roughness block by block.

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 roughness (in µm, inches: µinch)

The peak-to-valley height applies only for
basic contour elements.

Accurate stop ON G7-Geo

G7 switches the ”precision stop” on modally. In a ”precision stop,” the
CNC PILOT does not start the next block until the ”tolerance window”
around the end point is reached (for tolerance window, see machine
parameters 1106, 1156, ...).

• The NC block containing G7 is also executed with a precision

stop.

• ”Precision stop” is used for basic contour elements that are

executed with G890 or G840.

Precision stop OFF G8-Geo

G8 switches the precision stop off. The block containing G8 is executed
without a precision stop.

Blockwise accurate stop G9-Geo

G9 activates a precision stop for the NC block in
which it is programmed (see also ”G7 Geo”).

Help commands f

cont

our descr

iption

Overview: Help commands for contour description

Accurate stop ON

Accurate stop OFF

Accurate 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 finishing allowances – blockwise

G95

defines finishing feed rate for total contour

G149 additive compensation values for total contour