We were taken through precision measuring instruments, mainly Micrometers and vernier callipers which have accuracies of 0.01 and 0.02 millimetres. We went through the steps of how to read the instruments during measuring. The digital vernier calliper anyway is more accurate as the reading is displayed and just read straight away. A vernier calliper measures round and flat surfaced items and there are different sizes for different diameters, e.g One can measure from 0 - 25 mm and the other from 25 - 50 mm. Vernier callipers also measure the same and the include Depth and internal diameters. Below are pictures of the instruments we used. Before using the instruments they have to be zeroed first and lock them after measuring to ensure accurate answers.
Top. Vernier calliper.
Middle. Micrometer.
Below. Digital vernier calliper.
.
Later i drew a bracket using third angle projection and used the micrometer and vernier calliper to measure its dimensions to label the drawing correctly as per the evidence below.
Good stuff.
ReplyDeleteIn the top image (blue background), what size is that Imperial vernier caliper indicating (in decimal inches)?
Tim.