What types of places will sell small quantities of steel for diy projects? I'm looking for about 4 feet of 8'' wide c channel steel. I've called a few small fab shops that don't have any and industrial supply places that will only sell me a 20' section
Welcome to the world of people who like to do industrial crap for a hobby. I'm lucky enough to live near a metal yard that caters to anyone who walks in. You pay a bit of a premium for small pieces (in the form of cutting fees), but not too bad.
Look around and see if you can find any such place near you. If not, yeah, you're kind of stuck asking people/businesses who themselves would be using it.
So I'm seeing a couple of really good instruction sets for building your own printer, but I'm wondering how the quality is to something made professionally.
All of the test prints I've seen have very obvious imperfections. This isn't a huge problem because I figure you could always go and sand stuff down a bit, but I also wonder how strong the material is in comparison to traditionally manufactured plastic.
A 3d printer would be very convenient for making custom robotics parts but I want to make sure that it will hold up to a certain level of... Comment too long. Click here to view the full text.
>>910102 Every plastic part in the picture you posted was 3d printed and they can withstand the forces required of a 4-axis robot (the printer). If printed on the printer in the picture, you can DIY something similar; I have an all leadscrew reprap.
So to answer your questions: Probably. Yes. I dunno.
Hi /diy/ I'm interested in brewing my own alcohol that is pretty much only ethanol and water because that will get you drunk without a hangover. I've figured that if I use sugar and water only the alcohol will be more pure, are there other ways to purify the alcohol other than distillation and activated carbon?
I think im going to buy jbl e40 bt headphones, but i hate their look, giant labels, so i thought i could mod them somehow, ive got access to a small 3d printer, so maybe you have pics of modded headphones for design inspiration. Hope this is /diy/ and not /fa/, if so im sorry _.
Something inside my all-plastic Harbor Freight digital calipers broke and now there's a lot of play between the jaws aka it's useless.
What is the best in-between digital calipers that are better than the chinashit Harbor Freight variety and stupid expensive Mitutoyo/Starrett/etc calipers?? Something very high quality, steel, and guaranteed accurate for $40-60?
the stainless harbor freight ones are fine for $10. take them apart and wash out all the grit and garbage, lube, reassemble. they only get grossly inaccurate when the batteries are dying. buy a stack of fresh maxells off ebay.
So DC motors are pretty interesting, and they are indeed inductors. So that must surely mean that if the magnet inside has stopped moving some kind of resistance should be changing, as such does that mean that it's possible to tell if a motor has stalled?
I want to try and set up a smart motor, that will stop pumping current through when current spikes.
Hey electrical /diy/er's. I don't post here often, but I've been doing some tinkering, and right now I have a need for a digital oscillator (5V, square/ pulse output), and I want it to sweep its frequency range upon pressing a button.
In other words, what I want to accomplish is this: when I press a button or something, the oscillator will start at a relatively high frequency (sub 60 Hz), and then it will ramp down and after a few seconds it will be at a low frequency (maybe around 0.5 Hz or less, or completely stopped).
Because this VCO will be routed to some standard 7400 series TTL IC's, I would ideally like to modulate only the output frequency, and keep the 5V amplitude constant.
An astable multivibrator seems like a good starting point (maybe I'm wrong, I am only a neophyte). Pic related is a good ol' 555 timer. Currently, the output frequency is easily adjustable with the 20k Ohm pot, and I'm happy with the range of frequencies at the high and low ends.
I'm wondering if maybe I can make some sort of voltage-controlled resistor rig out of a transistor, and then using a cap to control the ramping-down speed. I could then control the output frequency of the oscillator. But I don't know how to go about this.
Very sorry about the long post, but if you can help me accomplish my goal from the second paragraph, then please guide me, sensei.
My family has an old hp media center PC 864n pic related and I wanted to know if anything was salvageable for a modern gaming PC like case or anything don't want to open it up unless I know that's the only option
>>909084 I know some one that sells these. It is just a pipe with a metal plate welded to the bottom and holes for nails/screws/bolts. They look better than this one and are painted green. They are heavy and rugged.
>>909086 Those stands are supposed to have boards of proper length screwed to the bottom... (hence the holes in the feet) and are kept as small as possible for storage reasons... Now explain to me how they are so bad..?
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