What is accurate? Often we use our tools and machines and assume they are accurate and set correctly. You assume your ruler is correct and that your tape measure reads the same measurements as your ruler, which is usually not the case. If you use the same ruler right through a job then the measurements will be consistent throughout. If you are passing measurements to other makers for cutting lists or parts, or buying cutters of a certain diameter, you need rulers that have standardised measurements, so it’s essential to get quality tools.
Systems of measurement have developed from as far back as the Egyptian cubit, a unit based on relative
