#Jonesy-Makes #video of restoring a Victorian-era ruling engine for #machining rulers on brass or possibly steel. #manufacturing #history #metrology
on 02026-08-25#Blondihacks #video #toread about #machining a tool sharpener (conclusion). #manufacturing
on 02026-05-15Maxim #Kachurovskiy on #manufacturing a concrete lathe for #machining with #3D-printing the molds, part 2. #video #toread
on 02025-12-18Maxim #Kachurovskiy on #manufacturing a concrete lathe for #machining with #3D-printing the molds, part 1. #video #toread
on 02025-12-18#video on tachometer #mechanisms for #machining
on 02025-12-17#video #toread about a 19th-century linear dividing engine for #machining a ruler.
on 02025-12-09#video listing books on #machining, mostly high #precision stuff, including Precision Hole Location from the Moore Tool Company, as well as their other books; ASME’s Handbook of Industrial Metrology (#metrology); Frank D. Graham’s Audels Machinists and Tool Makers Handy Book [sic sic sic!] from 01941; Franklin D. Jones’s “Old-Fashioned Toolmaking”; Henry Ford Trade School’s Shop Theory from 01934; The Starrett Book for Student Machinists; Goodrich and Stanley’s 01923 Tool and Gage Work; Miller and Russel’s Toolmakers Handy Book; Calvin & Stanley’s Gear Cutting Practice, reprinted by Lindsay Publications; Henriksen’s Jig and Fixture Design Manual; Moore, Davis, & Coplan’s Building Scientific Apparatus; Shigley’s Mechanical Engineering Design (by Budynas and Nisbett); US Steel’s The Making, Shaping, and Treating of Steel; Frank Curtis’s High Frequency Induction Heating; the ASM’s Metallurgy for the Non-Metallurgist, edited by Reardon; Dossett and Boyer’s Practical Heat Treating; the ASM’s Heat Treater’s Guide; and Edward F. Connelly’s Machine Tool Reconditioning.
on 02025-12-09#Cylo #video on books about #machining #precision #mechanisms: Richard Moore’s Holes, Contours, and Surfaces, which is largely about operating jig borers; Douglas Blanding’s Exact Constraint: Machine Design Using Kinematic Principles; CRC Press Basics of Precision Engineering, edited by Leach and Smith; Balasubramaniam, Sarepaka, and Subbiah’s CRC Press Diamond Turn Machining: Theory and Practice; Rowe’s Hydrostatic, Aerostatic, and Hybrid Bearing Design; Kittell’s Precision Mechanics; Evans’s Precision Engineering: An Evolutionary View; Smith and Chetwynd’s Fundamentals of Ultraprecision Mechanism Design; Slocum’s Precision Machine Design; of course Wayne R. Moore’s Foundations of Mechanical Accuracy; and Dave Arneson’s blog post listing “50 tidbits”. Smith and Chetwynd is hard to find.
on 02025-12-09Maxim #Kachurovskiy’s #video of #manufacturing a concrete lathe "NanoEls" with #3D-printing for #machining. Except that he also bought some machined aluminum parts from #JLCPCB CNC. Includes open-source (?) G-code control thing that consumes STL files. He regrets not leaving two channels in the base to post-tension the concrete with M12 threaded rod and not vibrating the concrete enough to get the bubbles out.
on 02025-10-21#Clough42 #machining #video about using fixture plates instead of vises. #toread
on 02025-09-2721' #video about #machining difficult parts, or failing to do so. Specifically, free hobbing worm wheels with a homemade hob was really difficult because the hob kept cutting the wrong number of teeth.
on 02025-09-06#Chronova hand #manufacturing an electric motor whose shaft is 90μm across, like William McLellan’s answer to Feynman’s “Lots of Room” challenge. It’s a permanent-magnet rotor nestled in between four straight electromagnets wound with 20μm wire. He kept losing parts. He spent several months on it. His soft iron rotors had coercivity that was too low, and #machining alnico on his lathe turned out to be impossible until he used grinding wheels. He finally gave up and just floated the alnico disc in watch oil on the other side of a cover slip. He got an electromicrograph. #small #motors #hardware
on 02025-06-17#machining #video recommending not using cast iron from weights because it’s too porous and falls apart when you try to machine fine threads in it.
on 02025-05-28#Titans-of-CNC #video about #autism in #machining, promoting Spartan-CNC.com. Turns out Titan Gilroy’s son is diagnosed with Asperger’s.
on 02025-05-28#video about ultrasonic #machining #manufacturing to drill glass with 40kHz ultrasonic spindle units for grinding, developed in the early 80s by Yoshihiro Take, chairman of Takesho, in Kasuga, Fukuoka Prefecture, Japan, as reported by Michelle Yamamoto
on 02025-03-22another #My-Engines #DIY #EDM #machining #video. Finally he got his pulse EDM working. He had blown the protection diodes and the pulse transistors in the #electronics. His numerous 25Ω power resistors were inadequately heatsinked. He found that long on-times were the key to low electrode wear, backwards from what I would have expected. Sadly he doesn’t say anything about his parameters (voltage, current, frequency, duty cycle) or circuit design. Looks like he’s at about 5kHz. He’s using a diesel fuel pump to circulate his lamp-oil electrolyte (kerosene) through water filters.
on 02025-03-12another #machining #video, by #My-Engines, on die-sink #EDM based on Ben Fleming’s book, using varying sizes of capacitors in an RC setup (16μF, 32μF, 192μF) with the lower capacitances giving a finer finish. He has some detergent (“wetting agent”) in his water electrolyte, presumably an nonionic surfactant (he says his tap water works better than deionized or distilled). However, though big electrodes worked fine, his thin copper and brass sheet electrodes eroded too rapidly, and he wasn’t able to get a stable “burn” out of either them or graphite. Lamp oil worked better than vegetable oil or water for him. #electronics #bootstrapping
on 02025-03-12#machining #video by #AndysMachines on his die-sink #EDM #machining #manufacturing setup. He’s using an aquariump pump to circulate his distilled-water electrolyte through a coffee filter, which needs changing often. He switched to a photo-flash 160μF capacitor for his IGBT-triggered 60V sparks (averaging around 50V). The #electronics use two DRV8825 stepper drivers, though they have trouble with the noise; the die advances when the current averages below an adjustable limit of 2.5 amps, and then there are periodic retractions to permit better flushing. He measures the capacitor voltage with a voltage divider to estimate the current. #bootstrapping
on 02025-03-12#machining #video by #AndysMachines on his die-sink #EDM #machining #manufacturing setup. He’s using an aquariump pump to circulate his distilled-water electrolyte through a coffee filter, which needs changing often. He switched to a photo-flash 160μF capacitor for his IGBT-triggered 60V sparks (averaging around 50V). The #electronics use two DRV8825 stepper drivers, though they have trouble with the noise; the die advances when the current averages below an adjustable limit of 2.5 amps, and then there are periodic retractions to permit better flushing. He measures the capacitor voltage with a voltage divider to estimate the current. #bootstrapping
on 02025-03-12#video by #AndysMachines on #EDM #machining, using an RC circuit to limit the energy of each spark and an IGBT to switch it, with 20μs on and 180μs off time (5kHz 10%), 60V, a 100μF electrolytic cap (which gets too hot), a heating element to limit the cap’s inrush current, a 3mm brass electrode cutting aluminum, and just distilled water for the dielectric. He makes it through 1mm of aluminum in 23 seconds, 18mm³/minute. #electronics #manufacturing #bootstrapping
on 02025-03-12#video of die-sink #EDM #machining in diesel fuel using an Arduino, a MOSFET for PWM, a halogen worklight in series to limit current, and a stepper motor. #TheIdahoanShow reports that motor oil, WD-40, and canola oil also work, and aluminum and brass (such as a cartridge case) both work well as electrode materials, but TIG welder electrodes tended to stick and not cut very well. Stainless “kind of worked”. His demo was to cut a plus-sign-shaped hole into a chunk of old file. #bootstrapping #DIY #jugaad #manufacturing
on 02025-03-12#video of "Not an engineer" #machining a new head for his milling machine, with a pneumatic tool changer and liquid cooling, out of a weldment.
on 02024-12-28#video #toread on eliminating lathe #machining tailstock quill play
on 02024-12-03#video #toread of #Uri-Tuchman #manufacturing rose engine ornamental lathe #mechanisms for #machining guilloché
on 02024-12-01#video by #We-can-do-that-better about #manufacturing a 26mm-diameter four-jaw lathe chuck. Demonstrates #machining soft jaws for a three-jaw chuck (each secured by two recessed screws) to perfectly grip the outer diameter of the small chuck, then reversing the soft jaws to cut a different radius on their other end. They use M3 triangular threads cut with taps and dies. It never occurred to me before, but some lathe chucks are like bloodworms in that they have four jaws. Brass locking pins Loctited into the back of the chuck hold the chuck screws in place by entering into undercuts in the middle of the chuck screw threads. Uses “poor man’s internal broaching” with a square broach ground from a broken tap to make square holes to drive the chuck screws with. 19 parts in all, almost all cut from a stainless bolt.
on 02024-12-01#Blondihacks #video #toread on #manufacturing a tool sharpener, part 2. #machining
on 02024-11-30#Blondihacks #video #toread on #manufacturing a tool sharpener, part 1. #machining
on 02024-11-30#Blondihacks #video #toread on #manufacturing a tool sharpener, part 5. #machining
on 02024-11-30#video on #3D-printing forms you fill with concrete for #bootstrapping #machining tools like a lathe
on 02024-10-22#video on #bootstrapping a DIY #CNC #machining mill under US$100 by #Hyperspace-Pirate, somehow including multiple-start leadscrews, brass nuts for them, etc. He’s #3D-printing the brackets to hold the aluminum together. Basically a bunch of aluminum extrusions (largely 8020 style held onto the brackets with T-nuts) to make a bedslinger gantry, which he can now mill aluminum on. The slinging is all happening with leadscrews instead of timing belts. He’s using NEMA steppers with shaft couplers, lots of Allen screws, precision-ground rods with linear ball bearings running on them, etc. Not super practical for poor people! The simple rectangular design maximizes compliance, which is counterproductive. And it’s going to lose steps and ruin parts from the end effector side loading. “I’m using a 24V 20A power supply which is way beyond what the machine needs but it’s what I had sitting around.” He’s running GRBL on an Arduino Uno, with A4988 breakout boards on an Arduino shield on top of it to drive the steppers. For whatever reason he decided to run the spindle off a 555 PWM driving an IRLZ34N MOSFET. He’s using UGS (Universal Gcode Platform) on his laptop to send the G-code to GRBL. He engraves and routes some wood with a ⅛” endmill. Rigidity problems initially prevent cutting aluminum. Budget: US$30 for spindle motor and collet (1.5A), US$24 for the build plate (¼” aluminum), US$11 linear bearings, US$10 extra endmills, total US$75.
on 02024-09-24#video on #machining the end of the hardtail vise #manufacturing #toread #Abom79
on 02024-09-10#video on #CNC #machining a bolt circle with "conversational programming" #manufacturing #toread #Abom79
on 02024-09-10#video on turning and facing aluminum beauty rings #machining #manufacturing #toread #Abom79
on 02024-09-10#Blondihacks #video on #manufacturing a tool sharpener (part 3). Also mostly lathework on laser-cut steel and drilling in a mill with a DRO. She’s mostly working on a table in this part, with a couple of four-bar linkages permitting two degrees of freedom of translation with no rotation. Demonstrates round-head screws for using threaded holes as references, an improvised hose-clamp-driven collet, etc. #machining
on 02024-09-03#Blondihacks #video on #manufacturing a tool sharpener (part 4) #machining. Mostly lathework on laser-cut mild steel, with some milling, and discussion of a machining error, how to avoid it, and how to compensate it.
on 02024-09-03#video on #manufacturing #optics by #machining pure copper (to eliminate inclusions enriched in other elements that can cause tearout) with a monocrystalline diamond cutter. Lots of footage from atomic force #microscopy and scanning electron microscopy. To eliminate 50μm steps between adjacent passes of the diamond milling cutter, he switched to 0rpm, just using his milling machine as a sort of shaper, and got the surface roughness down to about 13nm. #Breaking-Taps
on 02024-08-28#video on an electrical edge finder for #machining
on 02024-06-10#video on burr identification and removal in knife sharpening. Explains what a strop is actually for and shows microscope shots of the edge at various levels of magnification. #machining
on 02024-06-10#bootstrapping #machining and #manufacturing with a milling machine made of granite for #precision, the "RIG-CNC"
on 02024-05-21#Blondihacks did write another article on Hackaday about #machining #precision, this time about rigidity
on 02024-05-20#Blondihacks writing about #machining a test bar on a lathe to test the twist in its ways for #precision
on 02024-05-20Curt Filipowski #manufacturing a #machining lathe from concrete and a CNC router with gas-pipe ways
on 02024-05-20the following #Blondihacks column on Hackaday is in /category/hackaday-columns/page/392/ and is from a month later. It explains that “there are parts in all machine tools that (arguably) only lathes can make”, which is why Gingery starts #bootstrapping #machining with one. Well, after metal casting. And it explains that, when turning between centers, the lathe is only imprecise in two dimensions instead of three. That seems like it’s on the right track to why it’s useful for bootstrapping #precision #machining but not a fully adequate explanation. Searching for further columns in /category/hackaday-columns yields no results up to June, which is where I gave up.
on 02024-05-20the following #Blondihacks column on Hackaday is in /category/hackaday-columns/page/392/ and is from a month later. It explains that “there are parts in all machine tools that (arguably) only lathes can make”, which is why Gingery starts #bootstrapping #machining with one. Well, after metal casting. And it explains that, when turning between centers, the lathe is only imprecise in two dimensions instead of three. That seems like it’s on the right track to why it’s useful for bootstrapping #precision #machining but not a fully adequate explanation. Searching for further columns in /category/hackaday-columns yields no results up to June, which is where I gave up.
on 02024-05-20#Blondihacks explains the #bootstrapping of #manufacturing #precision in #machining: #history (Vaucanson, Maudslay, Andrey Nartov), and promises a series of articles covering the topic comprehensively. But that was six years ago.
on 02024-05-20#RMRRF DIY #EDM #machining #video #toread
on 02024-05-18#video of #Rack-Robotics’s DIY wire #EDM #machining rig, including #manufacturing it with #3D-printing from carbon-fiber-filled PLA; the power supply here is their “Powercore V2”, which is 200 watts at 70 Vdc output with “up to” 90% efficiency for US$400. He uses a jug of distilled water from the store. He says the Powercore is “expecting a 1Ω resistance”, so it doesn’t shock him when he puts his hand in the circuit, though I notice he doesn’t connect it across his two hands. He says the wire’s outer coating is zinc, not tin as I had guessed. He says the water circulation is 100 “psi”, and it seems to be moving at a pretty good clip parallel to the wire. He touts ±100μm tolerances on the current revision, which sounds pretty shitty for wire EDM, and for the next revision they’re still only targeting 50μm, so they’re really trying for the rapid prototyping market here, not the traditional ultra-precision market of wire EDM. The motors (“hybrid” steppers) are kept out of the water, using only mechanical linkages to move the toolhead and tension the wire underneath the water. They dunk it in a 10-“gallon” aquarium to hold the water. They’ve moved to Colorado Springs and gotten funded. (This video is from this week.) 180 watts output at 5kHz implies 36 millijoules per spark, which implies about a 14μF output capacitor.
on 02024-05-17#video of #manufacturing a DIY wire #EDM for #machining; basically an ad for #Rack-Robotics’s (rackrobo.io) maybe-someday-open-source Wire Tool replacement hotend to turn any 24-volt 3-D printer into an EDM machine with 300μm brass wire, which looks silver, so maybe it’s tinned. Not sure how the filtration and feedback works, which seems like almost the most important part? He never mentions filtering. Also demonstrates hand-carving a 600μm aluminum plate with a 1.5mm brass rod electrode, which ought to be impossible because it should short out to the workpiece when you’re holding it in your hand, but actually it works fine. Gets up to 100mm/minute with the wire on the 600μm aluminum, or 20mm/minute in 3mm aluminum, while steel is 4½ times slower, while titanium is only 2–2½ times slower than aluminum. The power supply (“Powercore V1”) goes up to 72 volts, but the demo is all at 65 volts; he says the hard part is actually the power supply, which is “high voltage” (ha!), high power, 5000 Hz. This is at #rmrrf which I think is the Rocky Mountain RepRap Fest.
on 02024-05-17another #video on #machining a #mechanical Frisbee launcher for disc golf
on 02024-05-02#StuffMadeHere #video on #machining a #mechanical 90 “miles per hour” Frisbee launcher for disc golf.
on 02024-05-02#video on #machining #mechanical worm gears on a lathe with a homemade gear hob
on 02024-05-02new #Nixie-tube #machining #video #toread
on 02024-05-01one of the last gun factories in Kashmir #machining #video. Basically #India’s #gun-control wiped out the industry
on 02024-05-01#clickbait #video on “turning a truck into weapons with the Mayans” #toread #machining
on 02024-05-01black oxide coating of fasteners #video #toread #machining
on 02024-05-01#Ken-Hawley on why files “aren’t used any more” #machining #video listing uses like rasping leather shoe soles, sharpening push saw teeth, and mechanical watchmaking which used to use files but no longer do
on 02024-04-06sharpening a knife with cigarette lighter wheels? #machining #video he basically nails two of the hardened file rings from the middle of the wheels onto a board and drags the knife between them, using them as non-rotating files. Then he demonstrates cutting paper with the burr.
on 02024-04-05sharpening a knife with spark plugs #machining #video #toread
on 02024-04-05sharpening a knife with a spark plug #machining #video demonstrates terrible knife technique on a tomato. Horrible elevator music. Then demonstrates obviously #fakenews #misinformation sharpening technique using the gap between two jam nuts on a bolt chucked up in a drill. Then demonstrates “sharpening” a different knife, evidently freshly sharpened on a grindstone, on the bottom of a ceramic mug, a technique which can work, though probably not with the movement demonstrated. ("Creative Hacker" gets killfiled!) Then a third knife, already evidently fairly sharp, finally demonstrates the supposed sparkplug technique: the plug is held in a vise to be hacksawed through the metal part, permitting the separation of the sintered sapphire insert, which apparently has an unglazed section where the metal covered it, which is used with the same ineffective movement to sharpen this third knife.
on 02024-04-05restoring and sharpening an antique file #machining #video #toread
on 02024-04-05restoring rusted files #machining #video starting with cleaning the teeth with an X-Acto knife, one tooth at a time, and steel wool, and denatured alcohol, and a file card. Then he uses electrolysis to remove the actual rust with sodium carbonate (half a cup in 5ℓ of water). He just used a 12-volt battery charger at about 3 amps for 4–8 hours. Then he had to clean the teeth again. Then he used acid etching to sharpen the teeth, because (he says) it works better than electrolysis, overnight in a bath of vinegar, a liter of 4% acetic acid, which he later neutralizes on the files with baking soda. Then he polishes with scotch-brite and protects with WD-40.
on 02024-04-05sharpening dull files in acid #machining #video apparently vinegar for 8 hours or sulfuric acid for 40 minutes sharpens dull files effectively
on 02024-04-05#Blondihacks on making filing buttons for hand filing #machining #video
on 02024-04-05hand filing for blacksmiths #machining #video recommends buying NOS (new old stock) files rather than new Nicholson ones that have been outsourced to Brazil or Mexico; thinks maybe new Grobet files from China or India might be okay but hasn’t tried them.
on 02024-04-05#Clickspring on hand cutting precision file teeth. Nothing especially precision about the teeth; they’re just eyeballed. #machining #video
on 02024-04-05hand-forged file #machining #video #toread
on 02024-04-05basics of filing #machining #video quite good
on 02024-04-05Make magazine on hand filing #machining #video worthless, not worth watching at all
on 02024-04-05#Fireball-Tool whether hand filing backwards is bad or not #machining #video #toread #todelete
on 02024-04-05hand filing 101 #machining #video Lots of time-wasting video of text and 3-D animations with some dumbfuck reading a script very, very slowly over it, while astoundingly shitty music plays. Does contain some actual information, but no actual tutorial content, despite the misleading video title.
on 02024-04-05#Prelinger archive on “fundamentals of” hand filing from 01942 #machining #video #toread
on 02024-04-05#Clickspring 8 tips on hand filing #machining #video #toread
on 02024-04-05using carbide inserts in a homemade dovetail cutter #machining #video #toread
on 02024-04-03#manufacturing an unnecessarily complex geared mechanical pencil #video #toread #machining
on 02024-04-03#manufacturing a springless air-powered graver #video #toread #machining
on 02024-04-03reinventing calipers with tiny sculpted brass hands and human foot and a micrometer thread with a half-nut, a quick-release micrometer #video #machining #metrology
on 02024-04-03hand-engraved metal computer mouse #video #toread #machining
on 02024-04-03#Inheritance-Machining “trying to save my busted lathe” #video #toread #machining
on 02024-04-03#machining a crazy (helical) part on the lathe from brass by moving a jaw on a 3-jaw chuck #video #manufacturing
on 02024-04-03#FIB #vacuum #machining #paper from 01999, “A review of focused ion beam milling techniques for TEM specimen preparation”, Giannuzzi and Stevie
on 02021-11-11https://archive.fo/a8LV8 Max Fischer and others talk about his US$1100 #CNC build, covering most of the most important parts of #machining: Heidehein glass scales, ODrive, the thermal expansion coefficient of aluminum, etc.
on 02021-11-03Sergey Baldenkov’s #pseudoscience site about #machining stone with vibrations in ancient #Egypt and stuff.
on 02017-03-22Sergey Baldenkov #video of #machining stone with extremely primitive vibrating bits (chunks of pipe tied to rocks, bent copper sheets, wires, other rocks) and wet abrasive, driven by a loudspeaker driving a metal diaphragm. Most of the sonic energy sounds like it’s in the 100Hz–1kHz band — the method would likely be faster and way less annoying if it were at a higher frequency, though getting vibrations big enough to use coarse abrasive would require higher power densities. Associated with all kinds of free-energy #pseudoscience nonsense (“technology of the ancients”, John Keely, Ed Leedskalnin’s Coral Castle, UFOs, etc.)
on 02017-03-22you can get a HSS step drill bit for #machining mostly sheet metal for AR$629
on 02017-03-22A "surface grinder" is apparently a grinding wheel mounted for #machining precise amounts off of a surface (with a precision down to about 2.5 μm) on a part held with low-distortion means (typically a magnetic chuck) on a movable table. #manufacturing #hardware
on 02016-09-11Guerrilla guide to #CNC #machining, mold making, and resin casting, by Michal Zalewski (Michał Załewski?, aka #lcamtuf @coredump.cx). #manufacturing #introduction
on 02016-08-11Hmm, a #CNC milling machine made out of circuit board materials (copper-clad fiber-reinforced epoxy). Preorder cost (as of 2016-08-11) is US$449. #hardware #machining
on 02016-06-29You can indeed control stepper #motors from a StarTech PCIe parallel port adaptor card under LinuxCNC with EPP mode. #hardware #cnc #machining
on 02016-05-06dxf2gcode generates G-code cutter paths and includes cutter compensation. Lots of #CNC #machining tips in the comments.
on 02016-01-14very basic #introduction to #CNC #machining
on 02016-01-06#video of #machining a bronze part for an eccentric drive mechanism on a manual #lathe and milling machine. He spends 20+ minutes getting it set up in the right position. Lots of time spent on workholding, dimension transfer with adjustable parallels, centering, indicating, deburring, that kind of thing. The author, Tom Lipton, talks slowly and clearly enough that you can play the videos at 2× with no problem.
on 02015-11-22explanations of machinability ratings for #manufacturing by #machining.
on 02015-11-16handibot is a handheld CNC power tool. #manufacturing #machining
on 02015-11-12Dan #Gelbart explains how his micron-precision metal-#machining #lathe gets its positioning accuracy.
on 02015-08-16the resources page on MIT’s precision machine design (and #machining and #manufacturing) course.
on 02015-08-16Thread on Practical Machinist forums about Dan #Gelbart’s videos, and in particular a #machining centering device he made with a small #laser.
on 02015-08-16#video demonstrating and explaining the construction of what surely must be the world’s most frugal large homemade #CNC #machining #hardware. Roughly 100μm repeatability over 50×50 cm. He uses threaded bars (Allthread) lubricated with used motor oil for the linear actuator, bare cartridge bearings as wheels. He uses low-power and therefore very slow (2mm/s) DC motors with an optical quadrature encoder (perhaps salvaged from a printer) for feedback, controlled by H-bridges from Arduino. Plastic tube couplings for U-joints on the threaded rods. A goofy little C program on his Linux box to control the Arduino. Calibrated against an inkjet printer. Engraves glass with a diamond milling cutter mounted in a flexible coupling to void breaking things. Cuts a Styrofoam wing cross-section with a soldering iron. Cuts gears from acrylic or aluminum with a milling cutter (like a Dremel mounted with hose clamps). Superb how-to video. By Norbert Heinz.
on 02015-08-13Designing a #flexure bearing with #Solidworks, simulating it with #FEA, and #machining it out of steel on a waterjet cutter. Lots of tips in the comment thread on #mecheng design.
on 02015-08-12Discussion of #Gelbart’s very impressive #machining #lathe on HN.
on 02015-08-11a 1-micron precision #lathe for #machining, by Dan Gelbart.
on 02015-08-10