Make journal: Vol. 42
From scrappy laser-cut wood kits just a couple of years in the past to today’s sleek-looking machines, computing device 3D printing maintains to conform into evermore shopper prepared machines. for the reason that there are such a lot of makes use of and person kinds for 3D printers, from faculties and academics to product prototypes and engineers, our guiding query was once by no means “which printer is best?” yet used to be in its place “which printer is correct for you?” We validated 26 printers and judged functionality via a chain of alternative prints and exams. try out our findings and locate the easiest printer on your needs.
Then, get pointers on printing movable components in one print, ensure that you do stick your first print layer from the beginning, and get the thin on neighborhood Motor’s totally 3D-printed car.
Plus, upload sparkling cyberpunk spikes on your favourite futuristic outfit, 3D print a couple of customized eyeglasses, construct a adjustable-height modeling desk at the reasonable, and discover ways to pickle scrumptious beets and grapes. All this and extra in Make: quantity forty two!
Read or Download MAKE Magazine, Issue 42 PDF
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Additional resources for MAKE Magazine, Issue 42
Sample text
Mass is a property of all matter. Gas, air, water, and metals have mass. The weight of a substance is caused by the Earth’s attraction on a substance (gravity). The only condition in which a substance has no weight is when it is falling in a perfect vacuum under the influence of gravity. At all other times it has weight. 2 ft/s 2 The unit of mass is the slug. 505 kilograms. 2 Table 1-5 shows the metric units of weight and their conversion to the English system. Before defining specific gravity, it should be explained that there must be a certain temperature used in arriving at specific gravity because liquids, solids, and gases will expand when heated and contract when cooled.
Since heat and solid are only relative to our senses, materials immersed in a pan of water will lose heat to it, and the heat extracted will be taken up by the water and used to generate steam. Through the extraction or flow of heat from objects so immersed, the water (assumed to be under the same normal sea-level pressures) would remain at 212◦ F, which would be cooler than the atmospheric temperature of our hypothetical planet. Fortunately for Earth dwellers, other liquids boil at temperatures much below that of water.
It has not been used much in home refrigeration and is not being used today to any degree. 4)—Ethyl chloride has been practically eliminated from the refrigeration field. 8)—Sulfur dioxide was once used 2 to a large degree, but it is very toxic and the only places that you will encounter it are in very old domestic refrigerators. 5)—Carbon dioxide is not used 2 in domestic refrigerators. 0)—Freon-12 was very popular for a long time. 7)—Freon-22 is no longer allowed to be used in domestic freezers.