HEIDENHAIN TNC 430 PA User Manual

10 Programming: Q Parameters
258
10.5 Calculating Circles
The TNC can use the functions for calculating circles to calculate
the circle center and the circle radius from three or four given
points on the circle. The calculation is more accurate if four points
are used.
Application: These functions can be used if you wish to determine
the location and size of a bore hole or a pitch circle using the
programmable probing function.
Function Soft key
FN23: Determining the CIRCLE DATA from three points
e.g. FN23: Q20 = CDATA Q30
The coordinate pairs for three points of the circle must be stored in
Parameter Q30 and in the following five parameters - here to Q35.
The TNC then stores the circle center of the reference axis (X with
spindle axis Z) in Parameter Q20, the circle center of the minor axis
(Y with spindle axis Z) in Parameter Q21 and the circle radius in
Parameter Q22.
FN24: Determining the CIRCLE DATA from four points
e.g. FN24: Q20 = CDATA Q30
The coordinate pairs for four points of the circle must be stored in
Parameter Q30 and in the following seven parameters - here to
Q37.
The TNC then stores the circle center of the reference axis (X with
spindle axis Z) in Parameter Q20, the circle center of the minor axis
(Y with spindle axis Z) in Parameter Q21 and the circle radius in
Parameter Q22.
Note that FN23 and FN24 beside the resulting
parameter also overwrite the two following parameters.
10.5 Calculating circles
MKAP10.PM6 30.06.2006, 07:04258
www.EngineeringBooksPdf.com

HEIDENHAIN TNC 430 PA Specifications

General

Manufacturer	HEIDENHAIN
Axes Control	Up to 5 axes
Operating Voltage	24 V DC
Operating Temperature	0 to 45 °C
Storage Temperature	-20 to 70 °C
Control Unit Type	CNC
Control Type	CNC
Display	Color LCD
Processor	Intel
Programming Languages	HEIDENHAIN conversational, DIN/ISO
Communication Interfaces	Ethernet, RS-232

Summary

Introduction

The TNC 426 B, the TNC 430

Describes the TNC 426 B and TNC 430 controls and their capabilities.

Manual Operation and Setup

Switch-on, Switch-off

Details the procedure for powering the TNC on and off.

Moving the Machine Axes

Explains how to move the machine axes using various controls.

Datum Setting (Without a 3-D Touch Probe)

Programming: Tools

Entering Tool-Related Data

Details how to input information related to tools.

Tool Data

Entering tool data into the program

Entering tool data in tables

Programming: Programming Contours

Fundamentals of Path Functions

Explains programming tool movements for workpiece machining.

Contour Approach and Departure

Path Contours — Cartesian Coordinates

Details path functions using Cartesian coordinates.

Path Contours — Polar Coordinates

Details path functions using polar coordinates.

Path Contours — FK Free Contour Programming

Explains free contour programming using FK.

Programming: Miscellaneous Functions

Entering Miscellaneous Functions M and STOP

Explains how to enter M functions and STOP commands.

Miscellaneous Functions for Program Run Control, Spindle and Coolant

Miscellaneous Functions for Coordinate Data

Miscellaneous Functions for Contouring Behavior

Programming: Cycles

General Information on Cycles

Drilling Cycles

Lists and describes various drilling cycles.

Cycles for milling pockets, studs and slots

Details cycles for milling pockets, studs, and slots.

Cycles for Machining Hole Patterns

Covers cycles for creating circular and linear hole patterns.

SL Cycles

Explains SL cycles for contour machining and surface finish.

Cycles for Multipass Milling

Describes cycles for machining surfaces with multiple passes.

Coordinate Transformation Cycles

Covers cycles for shifting, mirroring, rotating, and scaling contours.

Programming: Subprograms and Program Section Repeats

Marking Subprograms and Program Section Repeats

Explains how to mark subprograms and program section repeats using labels.

Subprograms

Details the operating sequence and programming notes for subprograms.

Program Section Repeats

Explains the operating sequence and programming notes for section repeats.

Programming: Q Parameters

Principle and Overview

Part Families — Q Parameters in Place of Numerical Values

Shows how to use Q parameters to program families of parts.

Describing Contours Through Mathematical Functions

Explains how to use Q parameters with mathematical functions.

If-Then Decisions with Q Parameters

Test Run and Program Run

Graphics

Explains the different graphic display modes and limitations.

Test run

Explains how to simulate programs and check for errors.

Running a program test

Details the procedure for testing programs and blocks.

Program Run, Full Sequence

Explains continuous program execution.

Program Run, Single Block

Explains block-by-block program execution.

Interrupting machining

Resuming program run after an interruption

Mid-program startup (block scan)

Returning to the contour