https://engx3d.com/blog/Machine news, 3D machine guides, engineering case studies and field notes — by Parth Parmar, mechanical engineer and designer.https://engx3d.com/blog/posts/2026-11-05-dial-3d-printing-yield-stress-ink.htmlhttps://engx3d.com/blog/posts/2026-11-05-dial-3d-printing-yield-stress-ink.htmlThu, 05 Nov 2026 08:00:00 +0000NewsNorthwestern engineers spread a paste-like ink into thin sheets and harden it with patterned light. The unhardened paste supports overhangs, so no scaffolds are needed, and one test part printed over 4x faster.https://engx3d.com/blog/posts/2026-11-04-isro-nvs-03-pyro-valves-open.htmlhttps://engx3d.com/blog/posts/2026-11-04-isro-nvs-03-pyro-valves-open.htmlWed, 04 Nov 2026 08:00:00 +0000NewsNVS-02 was stranded because one valve never opened. For NVS-03, launched on 30 October 2026, ISRO fired its pyro valves on the ground. How pyro valves work and what that trade-off means.https://engx3d.com/blog/posts/2026-11-03-where-planetary-gears-are-used.htmlhttps://engx3d.com/blog/posts/2026-11-03-where-planetary-gears-are-used.htmlTue, 03 Nov 2026 08:00:00 +0000Learn EngineeringOne sun, a few planets and a ring give several ratios, reverse and even power splitting. How automatic transmissions, the Prius hybrid and wind turbine gearboxes use the planetary gear set.https://engx3d.com/blog/posts/2026-11-02-reciprocating-vs-screw-air-compressor.htmlhttps://engx3d.com/blog/posts/2026-11-02-reciprocating-vs-screw-air-compressor.htmlMon, 02 Nov 2026 08:00:00 +0000ComparisonA piston compressor is cheap, simple and reaches high pressure but needs rest; a rotary screw runs all day, quieter and cooler. How each one works and how to pick.https://engx3d.com/blog/posts/2026-10-31-ship-central-cooling-plate-heat-exchanger.htmlhttps://engx3d.com/blog/posts/2026-10-31-ship-central-cooling-plate-heat-exchanger.htmlSat, 31 Oct 2026 08:00:00 +0000Field NotesMost modern ships keep seawater out of the engine room's cooling pipes. A titanium plate heat exchanger, the central cooler, hands the heat to the sea instead. Here is how the three circuits work.https://engx3d.com/blog/posts/2026-10-30-marine-diesel-engine-overheating.htmlhttps://engx3d.com/blog/posts/2026-10-30-marine-diesel-engine-overheating.htmlFri, 30 Oct 2026 08:00:00 +0000Field NotesMost marine diesel overheating starts on the sea water side: a closed seacock, a blocked strainer, a worn impeller or scaled heat exchanger tubes. How the two cooling circuits work and what to check first.https://engx3d.com/blog/posts/2026-10-29-helical-vs-worm-gear-reducer.htmlhttps://engx3d.com/blog/posts/2026-10-29-helical-vs-worm-gear-reducer.htmlThu, 29 Oct 2026 08:00:00 +0000ComparisonA helical gear reducer is usually 95–98% efficient; a worm reducer can drop below 50% at high ratios. How each one works, where the losses come from and how to choose.https://engx3d.com/blog/posts/2026-10-28-ship-propeller-shaft-stern-tube.htmlhttps://engx3d.com/blog/posts/2026-10-28-ship-propeller-shaft-stern-tube.htmlWed, 28 Oct 2026 08:00:00 +0000Learn EngineeringThe stern tube carries a ship's propeller shaft through the hull and keeps the sea out. How the shaft line works, what gets checked in dry dock — wear-down, seals, cracks, the propeller — and why.https://engx3d.com/blog/posts/2026-10-27-gate-globe-butterfly-check-valves.htmlhttps://engx3d.com/blog/posts/2026-10-27-gate-globe-butterfly-check-valves.htmlTue, 27 Oct 2026 08:00:00 +0000ComparisonGate valves isolate, globe valves throttle, butterfly valves are compact quarter-turn all-rounders, and check valves stop backflow. How each one works inside, and how valves are pressure-tested.https://engx3d.com/blog/posts/2026-10-26-welding-types-and-ndt-inspection.htmlhttps://engx3d.com/blog/posts/2026-10-26-welding-types-and-ndt-inspection.htmlMon, 26 Oct 2026 08:00:00 +0000ComparisonSMAW, MIG and TIG welding each protect the molten weld in a different way, which decides where they work best. How each process works, common weld defects, and the NDT methods that find them.https://engx3d.com/blog/posts/2026-10-26-material-selection-ms-ss304-ss316-cast-iron.htmlhttps://engx3d.com/blog/posts/2026-10-26-material-selection-ms-ss304-ss316-cast-iron.htmlMon, 26 Oct 2026 08:00:00 +0000ComparisonMild steel, SS304, SS316 and cast iron cover most everyday mechanical jobs. How their composition drives strength, corrosion resistance and weldability, and where each one belongs.https://engx3d.com/blog/posts/2026-10-26-gdt-basics-engineering-drawings.htmlhttps://engx3d.com/blog/posts/2026-10-26-gdt-basics-engineering-drawings.htmlMon, 26 Oct 2026 08:00:00 +0000Learn EngineeringGD&T tells a machinist how much a part's shape, orientation and position may vary and still work. How to read a feature control frame, what datums do, and why position uses a round zone.https://engx3d.com/blog/posts/2026-10-26-autocad-vs-solidworks.htmlhttps://engx3d.com/blog/posts/2026-10-26-autocad-vs-solidworks.htmlMon, 26 Oct 2026 08:00:00 +0000ComparisonAutoCAD is built for 2D drafting and layouts; SolidWorks is built for 3D parametric parts and assemblies. How each works, where each wins, and which one to learn first.https://engx3d.com/blog/posts/2026-10-24-hydrostatic-pressure-testing.htmlhttps://engx3d.com/blog/posts/2026-10-24-hydrostatic-pressure-testing.htmlSat, 24 Oct 2026 08:00:00 +0000Field NotesA hydrostatic test fills a pipe or vessel with water and raises it above design pressure to prove it is strong and leak-tight. Test pressure, hold time, step-by-step procedure and why water beats air.https://engx3d.com/blog/posts/2026-10-24-how-cooling-tower-works.htmlhttps://engx3d.com/blog/posts/2026-10-24-how-cooling-tower-works.htmlSat, 24 Oct 2026 08:00:00 +0000Field NotesA cooling tower cools water by evaporating a small part of it into moving air. How the fill, fans and drift eliminators work, what range and approach mean, and how much water a tower uses.https://engx3d.com/blog/posts/2026-10-24-corrosion-cathodic-protection-ships.htmlhttps://engx3d.com/blog/posts/2026-10-24-corrosion-cathodic-protection-ships.htmlSat, 24 Oct 2026 08:00:00 +0000Field NotesSea water turns a steel hull into a giant battery. How galvanic corrosion works, how zinc and aluminium anodes sacrifice themselves to protect the hull, and how impressed-current systems do it electrically.https://engx3d.com/blog/posts/2026-10-23-why-ship-engines-are-two-stroke.htmlhttps://engx3d.com/blog/posts/2026-10-23-why-ship-engines-are-two-stroke.htmlFri, 23 Oct 2026 08:00:00 +0000ComparisonContainer ships and tankers run on huge slow-speed two-stroke diesels bolted straight to the propeller. Why that works, how it compares with four-stroke engines, and where each is used.https://engx3d.com/blog/posts/2026-10-23-what-is-ship-dry-docking.htmlhttps://engx3d.com/blog/posts/2026-10-23-what-is-ship-dry-docking.htmlFri, 23 Oct 2026 08:00:00 +0000Field NotesDry docking lifts a ship out of the water so its hull, propeller, rudder and sea valves can be inspected and repaired. How a docking works, why the critical period matters, and what work gets done.https://engx3d.com/blog/posts/2026-10-23-v-belt-slip-squeal-failure.htmlhttps://engx3d.com/blog/posts/2026-10-23-v-belt-slip-squeal-failure.htmlFri, 23 Oct 2026 08:00:00 +0000Field NotesMost V-belt failures come from wrong tension, misaligned pulleys or worn grooves. How a V-belt grips, how to set tension by deflection, and how to read a failed belt.https://engx3d.com/blog/posts/2026-10-23-shell-and-tube-vs-plate-heat-exchanger.htmlhttps://engx3d.com/blog/posts/2026-10-23-shell-and-tube-vs-plate-heat-exchanger.htmlFri, 23 Oct 2026 08:00:00 +0000ComparisonShell-and-tube and plate heat exchangers both move heat between two fluids without mixing them. How each one works, how they compare, and why ships use both.https://engx3d.com/blog/posts/2026-10-23-gear-types-spur-helical-bevel-worm.htmlhttps://engx3d.com/blog/posts/2026-10-23-gear-types-spur-helical-bevel-worm.htmlFri, 23 Oct 2026 08:00:00 +0000ComparisonSpur, helical, bevel and worm gears each suit a different shaft layout, load and noise level. How each gear works, its trade-offs, and when engineers pick it.https://engx3d.com/blog/posts/2026-10-23-bearing-types-ball-roller-journal.htmlhttps://engx3d.com/blog/posts/2026-10-23-bearing-types-ball-roller-journal.htmlFri, 23 Oct 2026 08:00:00 +0000ComparisonBall, roller and journal bearings all carry a turning shaft, but in very different ways. How each type works, which loads it handles, and how bearing life is calculated.https://engx3d.com/blog/posts/2026-10-22-pump-cavitation-npsh.htmlhttps://engx3d.com/blog/posts/2026-10-22-pump-cavitation-npsh.htmlThu, 22 Oct 2026 08:00:00 +0000Field NotesCavitation is when liquid boils inside a pump and the bubbles collapse on the impeller. How NPSH available and NPSH required decide whether it happens, with a worked example.https://engx3d.com/blog/posts/2026-10-21-ship-turbocharger-two-stroke.htmlhttps://engx3d.com/blog/posts/2026-10-21-ship-turbocharger-two-stroke.htmlWed, 21 Oct 2026 08:00:00 +0000Field NotesA ship's turbocharger turns waste exhaust heat into charge air for the main engine. How the turbine, compressor, cooler and blowers work together, and how crews keep it clean at sea.https://engx3d.com/blog/posts/2026-10-14-iss-last-roll-out-solar-arrays.htmlhttps://engx3d.com/blog/posts/2026-10-14-iss-last-roll-out-solar-arrays.htmlWed, 14 Oct 2026 08:00:00 +0000NewsA Falcon 9 launched the final pair of roll-out solar arrays to the ISS. They unroll using energy stored in their own composite booms, with no deployment motors at all.https://engx3d.com/blog/posts/2026-10-13-atlas-hand-13-actuators.htmlhttps://engx3d.com/blog/posts/2026-10-13-atlas-hand-13-actuators.htmlTue, 13 Oct 2026 08:00:00 +0000NewsAtlas's new hand has 13 identical sealed actuators and no cables across the joints. Here is how direct, backdrivable actuation works, and why dropping the pinky was an engineering decision.https://engx3d.com/blog/posts/2026-10-12-sco2-gas-turbine-waste-heat.htmlhttps://engx3d.com/blog/posts/2026-10-12-sco2-gas-turbine-waste-heat.htmlMon, 12 Oct 2026 08:00:00 +0000NewsA Denver startup says factory-built supercritical CO₂ power blocks can add up to 50% more power to a simple-cycle gas turbine. Here is how a CO₂ loop replaces steam, and what is still unproven.https://engx3d.com/blog/posts/2026-10-11-robots-inspecting-ships.htmlhttps://engx3d.com/blog/posts/2026-10-11-robots-inspecting-ships.htmlSun, 11 Oct 2026 08:00:00 +0000NewsGecko Robotics is bringing robotic inspection to Anduril's new submarine factory. A look at why inspection slows shipbuilding down, and how a thickness check actually works.https://engx3d.com/blog/posts/2026-10-10-ships-building-offshore-wind.htmlhttps://engx3d.com/blog/posts/2026-10-10-ships-building-offshore-wind.htmlSat, 10 Oct 2026 08:00:00 +0000NewsTwo jack-up vessels just finished installing 76 giant turbines in the Baltic Sea, and a new wave of hybrid service ships is arriving. Here's how these machines actually work.