1. Fanuc
  2. FANUC Series 30i/31i-A Specifying Tilted Working Plane Based on the Tool Axis Direction

FANUC Series 30i/31i-A Specifying Tilted Working Plane Based on the Tool Axis Direction Additional Manual Page 2

Additional Manual
Ed.
App
rov.
Page
Name No.
Date Person
Contents
Date
FANUC Series 30i
/
31i-
A
Specifying Tilted Working Plane
Based on the Tool Axis Direction
A
-79976E
Feb.03.’05
2
/
14
FANUC LTD.
Person
1.1 SPECIFYING A TILTED WORKING PLANE BASED ON THE TOOL
AXIS DIRECTION
Overview
By specifying G68.3, a coordinate system (feature coordinate system) where the tool
axis direction is the +Z-axis direction can be automatically specified. When a feature
coordinate system is used, a program for cutting a hole or pocket in a plane tilted
relative to the workpiece coordinate system can be made simpler.
This function can automatically generate a feature coordinate system that is normal to
the tool direction.
Feature coordinate system (G68.3)
Machine coordinate system
Workpiece coordinate system (G54)
Yc
Zc
Xc
Fig. (a) Feature coordinate system
When G68.3 is specified in a block, the coordinate system for programming is
changed to a feature coordinate system. All commands after the block are regarded
as commands in the feature coordinate system until G69 is specified.
Previous page
Next page

Contents Summary of FANUC Series 30i/31i-A Specifying Tilted Working Plane Based on the Tool Axis Direction Additional Manual

  • Page 1FANUC Series 30i/31i -A Specifying a Tilted Working Plane Based on the Tool Axis Direction Specifications FANUC Series 30i/31i-A Name Specifying Tilted Working Plane Based on the Tool Axis Direction No. A-79976E Ed. Date Date Person Feb.03.’05 Person Contents Approv. FANUC LTD. Page 1 / 14
  • Page 21.1 SPECIFYING A TILTED WORKING PLANE BASED ON THE TOOL AXIS DIRECTION Overview By specifying G68.3, a coordinate system (feature coordinate system) where the tool axis direction is the +Z-axis direction can be automatically specified. When a feature coordinate system is used, a program for cutting
  • Page 3Format Format G68.3 X x0 Y y0 Z z0 Rα ; Set a feature coordinate system. G69 ; Cancel feature coordinate system setting (M series). G69.1; Cancel feature coordinate system setting (T series). Explanation of symbols X,Y,Z : Origin of a feature coordinate system (absolute) When 1 address or 2addresses
  • Page 4Explanation - Feature coordinate system By specifying G68.3, a feature coordinate system with the tool axis direction being the +Z-axis direction can be created. The tool axis direction means the tool axis direction based on the rotation axis position reached by automatic operation or manual operati
  • Page 5Vertical axis direction: P Zc Z-axis of feature coordinate system (Tool axis direction: T) Yc Xc Y-axis of feature X-axis of feature coordinate coordinate system system Fig. (c) Determination of a feature coordinate system When the tool axis direction vector ( T ) is parallel with the vertical axis
  • Page 6- Angular displacement R Angular displacement R is positive when a rotation is made clockwise viewed in the Z-axis direction of the feature coordinate system. The range of angular displacement R is: 0.0° ≤ R ≤ 360.0°. - Machine of table rotation type On a machine of table rotation type, the tool dir
  • Page 7- Example of operation An example of operation on a machine of tool rotation type is given below. The machine configuration is "BC type reference tool axis Z-axis". BC type tool axis Z-axis (Axes are intersecting.) C: 1st rotation axis (master) B: 2nd rotation axis (slave) Tool holder offset value =
  • Page 8Machine operation by sample program 1 Z N3 command Y Workpiece coorditate system X X- Y- Z N4 command Zｃ Yｃ Feat ur e coor di nat e syst em Xc- Yc- Zc Xｃ N5 command Z N7 command Y Workpiece coorditate system X- Y- Z X N3 block: Tilts the tool. N4 block: Sets a feature coordinate system where the too
  • Page 9Machine operation by sample program 2 Z N3 command Y Workpiece coorditate system X- Y- Z X Z N4 command Y X Zｃ N5 command Yｃ Feat ur e coor di nat e syst em Xc- Yc- Zc Xｃ Z N6 command Y Workpiece coorditate system X- Y- Z X N3 block: Performs tool length compensation in the workpiece coordinate syst
  • Page 101.2 Multiple G68.3 After the tool axis direction is changed in G68.3 mode, by specifying G68.3, a new feature coordinate system where the tool axis direction is the +Z-axis direction can be specified. - Origin of a feature coordinate system In the case of specifying G68.3 in G68.3 mode, the origin o
  • Page 11Machine operation by sample program 3 Z N3 command Y Yｃ X Xｃ Zｃ Feat ur e coor di nat e syst em Xc- Yc- Zc N4 command Z Y Yｃ X Xｃ Zｃ N5 command Z Y Yｃ Xｃ Zｃ X N7 command Z Y Yｃ X Zｃ Xｃ N3 block: Sets a feature coordinate system where the tool axis direction is the Z- axis direction. N4 block: Change
  • Page 12Restrictions The restrictions imposed on three-dimensional coordinate conversion also apply to the tilted working plane command. The following presents the restrictions to bear in mind in particular: Tool length compensation When tool length compensation direct is X-axis direction or Y-axis directio
  • Page 13Parameters 12321 Normal axis direction [Input type] Parameter input [Data type] Integerpath [Valid data range] 0-3 For longitude or latitude direction feed in the 5-axis machining manual feed mode, this parameter sets the axis parallel to the normal direction. 1 : Positive (+) X-axis direction 2 : P
  • Page 14Alarm and message Number Message Description PS5457 G68.2/G68.3 FORMAT ERROR A G68.2/G68.3 format error occurred. PS5459 MACHINE PARAMETER - A machine configuration parameter (parameter No.19665 INCORRECT to 19667, No. 19680 to 19714, or No. 12321) is incorrect. - The axis set in parameter No. 19681