Canonical machining commands

42 Pages·2.6 MB·English

by  Proctor, Frederick M.

i
PUBU0AT1ON8
NISTIR 597
AlllOS fiS'lSM I
Canonical Machining Commands
Frederick M. Proctor
Control Systems
Intelligent Systems Division
Thomas R. Kramer
Research Associate
Department of Mechanical Engineering
The Catholic University ofAmerica
Washington, DC 20064
and Intelligent Systems Division
and
John L. Michaloski
Control Systems
Intelligent Systems Division
U.S. DEPARTMENT OF COMMERCE
TechnologyAdministration
National Institute of Standards
and Technology
Bldg. 220 Rm. B124
Gaithersburg, MD 20899
QC
100 NIST
.U56
NO.5970
1997

NISTIR 5970
Canonical Machining Commands
Frederick M. Proctor
Control Systems
Intelligent Systems Division
Thomas R. Kramer
Research Associate
Department of Mechanical Engineering
The Catholic University of America
Washington, DC 20064
and Intelligent Systems Division
and
John L. Michaloski
Control Systems
Intelligent Systems Division
U.S. DEPARTMENT OF COMMERCE
Technology Administration
National Institute of Standards
and Technology
Bldg. 220 Rm. B124
Gaithersburg, MD 20899
January 1997
U.S. DEPARTMENT OF COMMERCE
Michael Kantor, Secretary
TECHNOLOGYADMINISTRATION
Mary L. Good, UnderSecretaryforTechnology
NATIONAL INSTITUTE OFSTANDARDS
ANDTECHNOLOGY
Arati Prabhakar, Director

Canonical Machining Commands
Frederick M. Proctor
Thomas R. Kramer
John L. Michaloski
Intelligent Systems Division
National Institute of Standards and Technology
Technology Administration
U.S. Department ofCommerce
Gaithersburg, Maryland 20899
NISTIR 5970
January 30, 1977
Canonical Machining Commands
Disclaimer
No approval or endorsement of any commercial product by the National Institute of
Standards and Technology is intended or implied. Certain commercial equipment,
instruments, or materials are identified in this report to facilitate understanding. Such
identification does not imply recommendation orendorsementby the National Institute
of Standards and Technology, nor does it imply that the materials or equipment
identified are necessarily the best available for the purpose.
Acknowledgements
Partial funding forthe workdescribedin this paperwas providedto Catholic University
by the National Institute of Standards and Technology under cooperative agreement
Number 70NANB2H1213.
Copyright
This publication was prepared by United States Government employees as part oftheir
official duties and is, therefore, a work of the U.S. Government and not subject to
copyright.
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Canonical MachiningCommands
CONTENTS
1.0 Introduction 1
Numerical Control Programming Language RS274
1.1 1
1.2 Work on Canonical Machining Commands and RS274 Interpreters at NIST...1
1.3 Canonical Machining Commands 2
1.3.1 Objectives of Canonical Machining Commands 2
1.3.2 Implementing Canonical Machining Commands 3
2.0 Canonical Machining Command View of a Machining Center 3
2.1 Machine Dynamics 3
2.2 Mechanical Components 3
2.2.1 Coolant 3
2.2.2 Axes 4
2.2.3 Axis Clamps 4
2.2.4 Spindle 4
2.2.5 Pallet Shuttle 4
2.2.6 Tool Carousel 5
2.2.7 Tool Changer 5
2.2.8 Operator Console 5
2.3 Controlled Motions 5
2.3.1 Controlled Point 5
2.3.2 Linear Motion 5
2.3.3 Arc Motion 5
2.3.4 Coordinated Motion ofAxes and Spindle 5
2.3.5 Feed Rate 6
2.3.6 Feed and Speed Overrides 6
2.3.7 Dwell 6
2.3.8 Units 6
2.3.9 Coordinate Systems 6
2.3.10 Current Position 6
2.3.1 1 Selected Plane 6
2.4 Error Conditions 6
iii
1
Canonical Machining Commands
3.0 The Canonical Machining Commands Defined 7
3.1 Preliminaries 7
3.1.1 Syntax 7
3.1.2 Command Call Errors 7
3.1.3 Groups ofCommands 7
3.1.4 Coordinated Motion 7
3.1.5 Rotational Motion Required 8
3.2 Initialization and Termination 8
INIT_CANON
3.2.1 8
END_CANON
3.2.2 8
3.3 Representation 8
SELECT.PLANE
3.3.1 8
SET_ORIGIN_OFFSETS
3.3.2 8
USE_LENGTH_UNITS
3.3.3 8
3.4 Free Space Motion 9
SET_TRAVERSE_RATE
3.4.1 9
STRAIGHT.TRAVERSE
3.4.2 9
3.5 Machining Attributes 9
SET_FEED_RATE
3.5.1 9
SET_FEED_REFERENCE
3.5.2 10
SET_MOTION_CONTROL_MODE
3.5.3 10
START_SPEED_FEED_SYNCH
3.5.4 1
STOP_SPEED_FEED_SYNCH
3.5.5 11
3.6 Machining Functions 11
ARC_FEED
3.6.1 11
DWELL
3.6.2 12
ELLIPSE_FEED
3.6.3 12
STOP
3.6.4 14
STRAIGHT_FEED
3.6.5 14
STRAIGHT_PROBE
3.6.6 15
3.7 Spindle Functions 15
ORIENT_SPINDLE
3.7.1 15
3.7.2 SET_SPINDLE_SPEED 16
SPINDLE_RETRACT
3.7.3 16
SPINDLE_RETRACT_TRAVERSE
3.7.4 16
START_SPINDLE_CLOCKWISE
3.7.5 16
START_SPINDLE_COUNTERCLOCKWISE
3.7.6 16
STOP_SPE4DLE_TURNING
3.7.7 16
USE_NO_SPINDLE_FORCE
3.7.8 16
USE_SPDIDLE_FORCE
3.7.9 16
IV
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Canonical Machining Commands
3.8 Tool Functions 16
CHANGE_TOOL
3.8.1 16
SELECT_TOOL
3.8.2 17
USE_TOOL_LENGTH_OFFSET
3.8.3 18
3.9 Miscellaneous Functions 18
CLAMP_AXIS
3.9.1 18
COMMENT
3.9.2 18
DISABLE_FEED_OVERRIDE
3.9.3 18
3.9.4 DISABLE_SPEED_OVERRIDE 1
ENABLE_FEED_OVERRIDE
3.9.5 18
ENABLE_SPEED_OVERRIDE
3.9.6 1
FLOOD_OFF
3.9.7 18
FLOOD_ON
3.9.8 19
MESSAGE
3.9.9 19
MIST_OFF
3.9.10 19
MIST_ON
3.9.11 19
PALLET_SHUTTLE
3.9.12 19
THROUGH_TOOL_OFF
3.9.13 19
THROUGH_TOOL_ON
3.9.14 19
TURN_PROBE_OFF
3.9.15 19
TURN_PROBE_ON
3.9.16 19
UNCLAMP_AXIS
3.9.17 19
References 20
Appendix A Issues Regarding Canonical Machining Commands 21
How
A. Generic 21
1
A.2 Program Functions 21
A.3 Arc format 21
A.4 Rotational Axis Position 23
A.5 Control Parameters 23
A.6 Allocation ofFunctionality to Hierarchical Levels 24
A.7 NURBS and Parametric Axis Control 24
A.8 Cutter Radius Compensation 24
Appendix B Header File 26
Canonical Machining Commands