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I stumbled across this guy on YouTube last night. Shake the future My first thought was NO FLIPPIN WAY. However, it's on the Interwebb so it's GOT to be true - right? He melts aluminum, brass, copper and iron - in a microwave. Except for the microwave, all his hardware is DIY - and he shows...

Terry: Component size and placement in panel design is the bug-a-boo of every Controls Engineer that works on industrial systems. Only we usually have to add in things like minimum recommended spacings, heat dissipation, minimum clear panel space allowances for future expansion... The stuff...

If you look on Ebay, Amazon, and a LOT of other places you'll find that there's only a couple of different types of servo drives and a host of motor sizes for these sewing machine servo motors. The range of motor sizes is enough to explain the different minimum and maximum speeds. The...

I put the 750W version if that servo motor/drive on my drill press, and put the speed pot in a 3D printed box, basically the same as eddieblade21 did - except that I found a schematic that used a Run/Stop switch too. I have 2 complaints about my servo motor/drive: first - my RPM display on the...

The voltage limit for the SCR also makes sense. Solid state devices are grown/built in layers, the layers are normally separated by a non-conductive layer. As it's the easiest to grow, this is usually silicon dioxide for silicon devices. The thickness of the layers is precisely controlled...

Perhaps a better way to think of it as something like "voltage times RPM sort of equals heat", as heat is probably the killer here. Higher RPM means more pulses/second so you have a higher duty cycle for the switching transistor(%ON time vs. %OFF time). All solid state electronic devices have...

Other than FM (Freaking Magic), how do they keep a complex part from changing shape as it's sintered? If the metal gets hot enough to fuse, I'd think it could also flow and change shape.

Looking at the picture of the Sugden casting I assumed that it was printed with the rear of the case down and that the lugs has warped toward the nose. I guess I never thought that it might have been printed in some other orientation. Does the casting give any hints which way it was printed?

$30 is not at all out of line, and not really that deep of a bite into the pocketbook. Maybe you consider the 1st Sugden Special a practice run and have them print another? Only this time allowing extra material on the lugs for machining them flat, or anywhere else that you find needs it.

A little off topic, but about plastic gears... On the Ford 3.0L Vulcan V6, around 1995, in my Ranger pickup they went from a distributor ignition to a "distributor-less" ignition. They kept the original distributor drive gear on the cam and used it to run the crankshaft position sensor and the...

Crueby on MEM is using a 3D printed metal bucket in his RC cable shovel build. RC cable shovel build He expressed an almost identical opinion regarding the quality of his parts.

I got a little "mad" money burning holes in my pockets, I'm looking at getting a resin printer. Ebay has a bunch of "certified" refurbished printers, several flavors of Anycubic and Elegoo printers, among others. Just wondering if anybody has any experience with a refurbished printer, or heard...

Try an air-conditioning/refrigeration contractor. Explain what you're building and you might get an offcut for free. It usually doesn't pay for them to keep short lengths around so they go into the scrap bin. If all else fails, doughnuts are always a good bribe.

When you consider that the filament contains 20-25% plastic, and you burn out the plastic, I was expecting shrinkage of more like 20-25% to get a solid part. If it's only 7-10% shrinkage then the object will most likely be very porous, kind of like an aquarium bubbler. Many years ago I read a...

davidyat: You don't know how may times I wished I STILL had my '59 split-windshield bus. Don

Several years ago Bob DeFord built a Spitfire replica around one, that replica was written up in the EAA's magazine. That may sound like sacrilege, but Merlins are unobtanium and the Allison was available. He did a lot of mixing and matching on that bird, he might have something? Nice guy, I...

20 some years ago when my parents were still living and on their acreage, a female woodchuck burrowed under the wall and into one of Dad's sheds. She was building a nest to have her litter, made a helluva mess. I feel your pain. Don

I saw this one on YouTube last night.... It's a build video of a PAPER motorcycle model, that's right - I said paper. This guy is good, I mean really GOOD!

You really shouldn't need to fill a resin print, other than to repair the areas where support material was attached. The layers of a resin printer should be about an order of magnitude thinner than a filament printer, down to the point where you need magnification to clearly see the layer...

"if you use a ceramic mold coat" You've mentioned the mold coat before, what is it that you use? (You've probably answered that question before, but right now I'm too lazy to go searching.) Don