{"id":248890,"date":"2024-10-19T16:24:05","date_gmt":"2024-10-19T16:24:05","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asme-b89-4-21-1-2020\/"},"modified":"2024-10-25T11:35:22","modified_gmt":"2024-10-25T11:35:22","slug":"asme-b89-4-21-1-2020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asme\/asme-b89-4-21-1-2020\/","title":{"rendered":"ASME B89.4.21.1 2020"},"content":{"rendered":"

This Technical Report discusses important influences of the environment on dimensional and geometric measurements performed using coordinate measuring machines (CMMs), including influences on both the machine and the workpieces to be measured. This Report discusses the thermal effects related to the use of tactile CMMs, but many of these effects are also applicable to optical and other noncontact coordinate measurement systems.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
6<\/td>\nFOREWORD <\/td>\n<\/tr>\n
7<\/td>\nASME B89 COMMITTEE ROSTER <\/td>\n<\/tr>\n
8<\/td>\nCORRESPONDENCE WITH THE B89 COMMITTEE <\/td>\n<\/tr>\n
10<\/td>\n1 SCOPE
2 INTRODUCTION AND BACKGROUND
2.1 Operating Conditions
2.2 Definition of Environment
2.3 Environmental Effects <\/td>\n<\/tr>\n
11<\/td>\n2.4 Users of This Technical Report
3 THERMAL EFFECTS
3.1 Thermal Expansion of Materials
Figures
Figure 3.1-1 The Effect of Increase in Temperature on Length <\/td>\n<\/tr>\n
12<\/td>\n3.2 Differential Thermal Expansion
3.3 The Metrology Loop: A Three-Element System in Coordinate Metrology
Figure 3.2-1 Effect of Differential Expansion on Length <\/td>\n<\/tr>\n
13<\/td>\n3.4 Bimetallic and Gradient Bending
3.5 Thermal Response Times <\/td>\n<\/tr>\n
14<\/td>\nFigure 3.5.2-1 Thermal Step Response
Tables
Table 3.5.2-1 Thermal Step Response Versus Number of Time Constants <\/td>\n<\/tr>\n
15<\/td>\nFigure 3.5.2-2 Thermal Response of a Simple Body to Temperature Variation <\/td>\n<\/tr>\n
16<\/td>\n3.6 Thermal Environment Characteristics
Figure 3.5.2-3 Differential Equation of Measuring System: Two-Element Responses <\/td>\n<\/tr>\n
17<\/td>\nFigure 3.6.2-1 Typical Thermal Cycle <\/td>\n<\/tr>\n
18<\/td>\n3.7 Uncertainty Considerations <\/td>\n<\/tr>\n
19<\/td>\n4 NONTHERMAL EFFECTS
4.1 Vibration <\/td>\n<\/tr>\n
20<\/td>\n4.2 Illumination
4.3 Particulate Contamination
4.4 Electrical Supply
4.5 Humidity <\/td>\n<\/tr>\n
21<\/td>\n5 ASSESSING THERMAL EFFECTS
5.1 Temperature Measurement
Table 4.5-1 Ferrous Corrosion Development <\/td>\n<\/tr>\n
22<\/td>\n5.2 Drift Testing
5.3 Thermal Derating <\/td>\n<\/tr>\n
23<\/td>\n6 ASSESSING VIBRATION EFFECTS
6.1 Foundation Vibration Testing (Based on ASME B89.4.22 (ref. [17]) <\/td>\n<\/tr>\n
24<\/td>\n6.2 Relative Motion Tests for Vibration
6.3 Instrument Internal Sources
Figure 6.1-1 Passive and Active Isolation Systems <\/td>\n<\/tr>\n
25<\/td>\n7 MANAGING THERMAL AND VIBRATION EFFECTS
7.1 Instrument Specifications
7.2 Thermal and Other Environment Controls <\/td>\n<\/tr>\n
26<\/td>\n7.3 Thermal Compensation <\/td>\n<\/tr>\n
27<\/td>\n7.4 Workpiece Handling <\/td>\n<\/tr>\n
28<\/td>\n7.5 Interim Testing
7.6 Handling Thermal Influences in Uncertainty Analysis
8 ECONOMIC CONSIDERATIONS
8.1 General <\/td>\n<\/tr>\n
29<\/td>\n8.2 Cost Elements to Consider
9 REFERENCES <\/td>\n<\/tr>\n
31<\/td>\nNONMANDATORY APPENDIX A OVERVIEW ON THE USE OF TEMPERATURE CONTROL FOR METROLOGY OF WORKPIECES
A-1 INTRODUCTION
A-2 TEMPERATURE CONTROL <\/td>\n<\/tr>\n
32<\/td>\nTable B-1-1 Thermal Capacitance of Common Engineering Materials
NONMANDATORY APPENDIX B EXAMPLES OF THERMAL TIME CONSTANTS
B-1 INTRODUCTION <\/td>\n<\/tr>\n
33<\/td>\nB-2 EXAMPLE 1 \u2014 GAGE BLOCK
B-3 EXAMPLE 2 \u2014 BALL BAR <\/td>\n<\/tr>\n
34<\/td>\nFigure B-3-1 Change in Ball Bar Length as a Function of Time
Table B-3-1 Summary of Surface Area and Volume
Table B-3-2 Surface Area and Volume as a Function of Length <\/td>\n<\/tr>\n
35<\/td>\nTable B-3-3 Ratios of Volume\/Area as Function of Length
B-4 EXAMPLE 3 \u2014 CHANNEL SECTION
B-5 EXAMPLE 4 \u2014 COMPOSITE FAN BLADE <\/td>\n<\/tr>\n
36<\/td>\nFigure B-5-1 Measured Temperature Versus Time With Calculated Values Using the Thermal Time Constant, \u03c4, Obtained From a Least-Squares-Error Fit to the Experimental Data <\/td>\n<\/tr>\n
37<\/td>\nFigure B-5-2 Estimated Soak-Out Time for a Workpiece Coming From a Shop Area at Some Temperature Into a CMM Room With a Nominal Temperature of 20\u00b0C
B-6 REFERENCES <\/td>\n<\/tr>\n
38<\/td>\nNONMANDATORY APPENDIX C ILLUMINATION EFFECTS
C-1 APPLICATION TO THE MEASUREMENT TASK <\/td>\n<\/tr>\n
39<\/td>\nFigure C-1-1 Diopters as a Function of Age
C-2 ADDITIONAL CONSIDERATIONS <\/td>\n<\/tr>\n
40<\/td>\nFigure C-1-2 Percent Acuity as a Function of Age <\/td>\n<\/tr>\n
41<\/td>\nFigure C-2.1-1 Energy Distribution of Fluorescent Lamp <\/td>\n<\/tr>\n
43<\/td>\nNONMANDATORY APPENDIX D THERMAL THEORY
D-1 GENERAL
D-2 MECHANISMS FOR HEAT TRANSFER
D-3 HEAT TRANSFER RATE
D-4 CONVECTION HEAT TRANSFER <\/td>\n<\/tr>\n
44<\/td>\nFigure D-4-1 Heat Transfer by Convection Showing Air Velocity Profile <\/td>\n<\/tr>\n
45<\/td>\nFigure D-4-2 Convective Heat Transfer Coefficient, h, as a Function of Velocity
Table D-4-1 Typical Values of Convective Heat Transfer Coefficient
D-5 CONDUCTION HEAT TRANSFER <\/td>\n<\/tr>\n
46<\/td>\nFigure D-5-1 Example of Temperature Profile Within a Workpiece
D-6 RADIANT HEAT TRANSFER <\/td>\n<\/tr>\n
47<\/td>\nFigure D-6-1 Part of the Electromagnetic Spectrum <\/td>\n<\/tr>\n
48<\/td>\nFigure D-6-2 View Factor Between Two Rectangular Faces
D-7 REFERENCES <\/td>\n<\/tr>\n
49<\/td>\nFigure D-6-3 Values of F1\u20132 for Assumed Values of the Ratio and Angle <\/td>\n<\/tr>\n
50<\/td>\nTable E-1-1 Thermal Properties of Common Engineering Materials
NONMANDATORY APPENDIX E USEFUL THERMAL PROPERTIES
E-1 COMMON ENGINEERING MATERIALS
E-2 CONVERSION FACTORS <\/td>\n<\/tr>\n
51<\/td>\nTable E-2-1 Useful Conversion Factors for Thermal Properties <\/td>\n<\/tr>\n
52<\/td>\nNONMANDATORY APPENDIX F MACHINE DESIGN CONSIDERATIONS
F-1 GENERAL
F-2 CMM DESIGN COMPONENTS <\/td>\n<\/tr>\n
53<\/td>\nFigure F-2.3-1 Effect of Differential Expansion Relative to Distance Between Beam Faces <\/td>\n<\/tr>\n
55<\/td>\nNONMANDATORY APPENDIX G SEISMIC VIBRATION VERIFICATION TESTS
G-1 SCOPE
G-2 DEFINITIONS
G-3 VIBRATION ACCEPTANCE CRITERIA <\/td>\n<\/tr>\n
56<\/td>\nG-4 INSTRUMENTATION <\/td>\n<\/tr>\n
57<\/td>\nG-5 TEST PROCEDURES <\/td>\n<\/tr>\n
58<\/td>\nG-6 CRITERIA ASSESSMENT
G-7 REPORT
G-8 FIELD INSTRUMENTATION DIAGRAM
G-9 REFERENCE <\/td>\n<\/tr>\n
59<\/td>\nFigure G-8-1 Diagram of Sensor Arrangement and Instrumentation Configuration <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ASME B89.4.21.1-2020: Environmental Effects on Coordinate Measuring Machine Measurements<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASME<\/b><\/a><\/td>\n2020<\/td>\n63<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":248892,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2643],"product_tag":[],"class_list":{"0":"post-248890","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-asme","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/248890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/248892"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=248890"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=248890"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=248890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}