Metrology Lab 2 Fall 2023- aswin

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Conestoga College *

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1030

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Aerospace Engineering

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Dec 6, 2023

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docx

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7

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MACH8006 - LAB 2 Name: ASWIN ANIL Date: 09/28/2023 Prerequisite : Completion of assigned readings. Introduction : As indicated in the text, understanding the basic principles of measurement with vernier calipers will help students minimize errors regardless of which type of readout the instrument has— digital, dial, or vernier. Vernier calipers may be used for outside, inside, and depth measurements. The purpose of this lab is to explore the use of vernier-scaled tools in taking measurements and to understand the variations that can occur with individual users and among multiple users. Items needed: Tools to record data A set of standard SAE and/or metric gage blocks Numbered metal cubes to measure, all of which are less than one inch in length, width, or height. See the Appendix for typical examples. Vernier-scaled calipers and height gages Calipers and height gages from multiple sources are beneficial but not necessary. A set of dial or digital calipers may be used by the students to confirm their vernier- scale readings, but these should not substitute for learning how to read a vernier scale.
MACH8006 - LAB 2 Name: ASWIN ANIL Date: 09/28/2023 E XERCISE 1 Observation: Familiarize yourself with the measurement you were given. Your instructor will review and demonstrate the proper procedure for using these instruments. What measurement errors may occur with improper use? My instructor had provided me with a vernier caliper (not with a digital read-out) and height gauge with a lens attached near to the scales to magnify the read-out for easy measurement. There are a few errors that can be produced while improperly handling a vernier caliper. The first thing to notice is whether the caliper is set to 0; due to wear and environmental conditions, there might be deviations of the slightest, which should be noted before putting the vernier to use. Secondly, over-tightening would be inadvisable, as it would damage the measuring hands, which will give way to improper readings. Moreover, the vernier should be used as intended; the vernier should be placed parallel to the workpiece that is being measured; if not, there is room for error. These errors apply similarly to a height gauge as well; if not properly calibrated or used roughly, it may produce readings with deviations. E XERCISE 2 Measure: Using the instructor-supplied block, measure the length, width, and height of the block. Record your measurements. When everyone is finished, compare the readings. Are they the same? Why or why not? Discuss possible reasons for any variations. A cylindrical block was given, and its length, height, and width were taken with the help of a vernier caliper. Using the vernier, the following measurements were taken: The outer diameter of the block (OD) 95.50 mm The inner diameter of the block (ID) 47.22 mm Total height of the block (H) 108.50 mm These values remained nearly exact across the class. The only deviations we found to be present were between ± 0.02 mm. These small differences could be the cause of parallax error, it could be a calibration issue, or it could be down to how we held/used the vernier while measuring the block.
MACH8006 - LAB 2 Name: ASWIN ANIL Date: 09/28/2023 E XERCISE 3 Measurements: In your group, measure and record the length, width, and height of the cubes provided by your instructor. Keep a detailed record of what measurements correspond to each specific dimension for each student. A block of cylindrical cubes was given for measurement, it consisted of 4 cubes of varying height and diameter stacked on top of each other, a smaller piece atop the bigger one. The diameter (d) and height (h) designations for each cube are shown below for a better understanding of the measurements we’ve taken. The measurements are as follows: d1 76.2 mm h1 37.7 mm d2 57.26 mm h2 63.24 mm d3 47.8 mm h3 82.56 mm d4 31.68 mm h4 101.68 mm
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