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Is their a fairly easy way to tell the horsepower of an electric motor? I need to be accurate to with about 1/8th of an HP. I picked up a cache of old electric shop tool motors (think drill presses and table saws) but none of them have data plates. Most of these motors are pre-WWII as they are repulsion-induction types and don't use capacitors. A few do use caps though. Motors of that age tend to be very large for their horsepower output, so I can't just go by the physical size of the motor. They also tend to be less efficient then modern motors so I can't just go by their ampere draw either. Some appear to be from at least the early 20's and others might be as late as the 50's, so their efficiency is all over the map. I doubt any of these motors pull more then 1.5 HP but the smaller ones could be as little as 1/4th HP. Most are about 1700 RPM but there are a few 3400 RPM ones also.
24 replies and 5 images submitted. Click here to view.
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Attack weight x to it and see how long it takes to lift the weight given distance y. Then you can calculate its hp.

Faggot
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>>986800
http://lmgtfy.com/?q=how+to+determine+horse+power+of+an+electric+motor
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>>986813
I already hit up google or I wouldn't be here. Just to humor you I followed your link. I went to the first 10 links in that, they were all useless. They were either all simple 'volts + amps = horsepower' calculators (not accurate enough) or required I know the efficiency of the motor. If I had the dataplate with the efficiency spec on it I would already have the horsepower. I skipped links talking about cars of course.

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hey DIY, I'm trying to execute a painting I've planned. I'm trying to create a 4x4ft pixel art painting. I've already planned everything out on graph paper, but I'm thinking the best way to actually make something this large would be to tile
9, 16x16in wood panels . This way I could use a t-square and triangles to transfer the sketch onto the pieces, and it would also be more easily transportable than one large piece of canvas or wood.

TLDR
What's the best way to square up rough lumber as perfectly as possible, and the cheaper the method the better. I don't mind rolling up my sleeves for hard work.
6 replies and 2 images submitted. Click here to view.
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>>986799
The only way to get it done 100% right is to use a planer and a jointer.

https://www.youtube.com/watch?v=3bbHwoi4kz8
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>>986807
thanks for the link, and this is a great solution, but do you know of one that's more economical. I don't have really have any access wood shop tools.

I have more time than money.
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>more economical

if you were a master craftsman, preferably Japanese, you could use of these to get a perfectly flat surface. but you're not, so forget it. if you can find a small renovation company, you might phone and ask if they'll do it for you. sometimes they finish a job early, and can spare a few minutes when they get back to the shop.
alternately, find something already flat and cheap, like wallboard.

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How would one do this without using A digital projector?

See photo

Looking for a method to make a static logo or text block, project it, and have that function long term
6 replies and 1 images submitted. Click here to view.
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Spotlight and a cutout template.
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>>986646
How do you focus it though?
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>>986647
Long tube helps reduce light that isn't flying straight out of the cutout. May be able to find a spotlight lense on ebay and build your own spotlight. Still just a cutout to get the wall text.

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I made condoms for my chisels.

r8
12 replies and 2 images submitted. Click here to view.
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>>986537
What are they made of? Rubber?

I only own one chisel and it's purpose is for when I change outdoor handles/plates. I didn't used to use one for that and now I never will do it without one.
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>>986537
works for you/10?

I keep mine in a drawer with the plastic covers they came with that sort of almost stick on. If they're in the drawer they are pretty good about it.

I just fixed grandpa's shop vac that sounded like it was going to explode and was missing a bearing and I thought the brushes were fucked or something... It was just the switch wire being loose. ... And the missing bearing that I shoved a bunch of aluminum shim in.

(The best thing I learned in highschool was from Zen and the...
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>>986545
I wrapped the bare chisels in saran wrap and dipped the ends in pic related. Allowed to dry then repeated twice.

the plastic cling film made it relatively easy to pull the rubber coat off, then trimmed with a box cutter. I also pulled off the saran wrap from the ends with pliers.

>>986546
I was dumb and threw the plastic covers away the moment I brought them home. The chisels have been banging their edges with wrenches and pliers in a toolbox since, but...
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What should I put in this empty NES?
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>>986531
>What should I put in this empty NES?

The guts of an NES missing its case
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>>986534
Very funny. I made a lego case a few years ago for it and was left with this empty shell.
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>>986536
nice, pics? I love seeing this stuff.

In seriousness, I have seen a lot of NES casemods where people cram an entire ITX PC in, or just a raspberry pi, running emulators or a home server. if you're into that sort of thing.

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I'm starting my own business making poster frames out of repurposed wood from barns and restoration jobs. The frames are easy to make with my tools, and I'm getting a mat cutter Monday. Do any of you have any techniques you like to use?
7 replies and 3 images submitted. Click here to view.
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>>986490
Learn to cut miters.
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>>986514
And to take pictures.
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>>986490
Buy a framing point driver and save yourself the time and misery of doing it any other way. Also use wire and screw eyes for hangers instead of those shitty saw tooth things.

File: Mercury_vapor_yard_light.jpg (11 KB, 300x225) Image search: [iqdb] [SauceNao] [Google]
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Having a heck of a time finding the type of outdoor light I want.

I would like a 2-stage, motion-detecting, dusk-to-dawn, LED light in the style of the old mercury lights but I'm not having much luck. In particular the 2 stage part doesn't seem to be used widely enough for the filters at various websites.

Google wants to keep giving me accent lighting for stairs or garbage honeywell products.

In exchange I'll try to answer your HVAC questions.
7 replies and 1 images submitted. Click here to view.
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Call the power company and tell them you want a yard light?
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>>986459
Pic related was simply the style I want, it wouldn't have any of the other features. I suppose I could wire in motion detectors and light sensors myself but that would look sloppy.
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>>986460
>Pic related was simply the style I want,
I have one of those sodium lights IN my garage. I taped over the light sensor and plug it in when i need mega lumens.

BZZZZZZZZZZZZZZ

Anyone here intersted in helping with my new floating home? I've been working on the sketches for 1 year now and i feel like im getting close. And i want your thoughts on the project. Will be posting pics. Also if you know where one can buy large amounts of plastic drums 200l on the global marketplace for a cheap price it will be appreciated.
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>>
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I want to build new speaker enclosures using OSB, anyone knows whats a good finish for this material?

I'm thinking epoxy but idk
16 replies and 3 images submitted. Click here to view.
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>>986418
polyurethane, many coats
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>>986419
bear with me please

correct me if i'm wrong:
1. sand it till it's completely smooth
2. apply poly coat 1
3. sand it again?
4. poly coat 2
etc
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>>986418
Why wouldn't you use mdf?

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I'm a freshman engineer student and I could use some help. One of my classes is called Challenges of Enginery and the topic is to create a big project on a random subject. This year is creating a machine that reduces the production of garbage. I still have time, but my group and I can't think of any good projects. The projects have to be original, functional and must not generate more garbage than the one it eliminates. If anyone has any idea that they could share i would be really grateful.

(random pic for attention)
17 replies and 3 images submitted. Click here to view.
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>>986408
Well here's one, a machine that creates honeycomb instead of corrugated cardboard for boxes. you get the same strength of box while reducing the material used, so end up with a reduction in garbage.
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Algae -> biopolymer/cellulose generation as a sheet -> thick sheets you can stamp into compostable dining ware. Maybe integrate a stiff but energy-intensive biopolymer to make the dining ware out of a composite of multiple different types of plastics.

Maybe integrate fertilizer into it, so that your compost generates good stuff for plants, so that your plants power an aquaponics system with algal biofuel, so that somehow you can go right back to manufacturing dining ware.

No one will ever have to wash dishes again. Everyone grills. Beans and rice are cooked in gigantic self-cleaning basins.

FUCK I HATE YOU REAGON AND BUSH FOR CANCELING THE ALGAL BIOFUELS PROGRAM, FFFFFUUUUUUUUUCCCKKK YOOOOOOOUUUUUUU!!!

Btw the was a future home from the 50s or 60s that also involved no cleaning of dishes nor use of any pots nor utensils for cooking, BUT FUCKING REPUBLICANS STRUCK DOWN ALL THE RELATED RESEARCHES AGAIN FUCK YOU EISEMHOWER!!!
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>>986417
You mean like bioplastic with algae? I've heard that you could do something like that with agar-agar... I really like the idea, care to elaborate a little more? There was this one group with agar-agar based medical packing, but it wasn't that well received. Maybe with a better formula and less specific applications it could work well.

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Hi /diy im a 22 year old college student who likes to do DIY in my spare time. I was thinking about putting pegboard on the wall right here in my apt to hang my tools on and have a small work area. Obviously the things on the desk will be moved. But how do i hang pegboard? and how much can it hold?
12 replies and 7 images submitted. Click here to view.
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>>986398
You're going to want to locate studs and mount a couple 1x2" s to them and then mount your ped board to the 1x2"s. There needs to be a gap behind the pegboard for the back side of the tool holders.
>>
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>>986398
Forgot image
>>
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>>986398
Something like this.

I know this is a very basic questions, but I've been looking at differences sources and found conflicting info.

I need to glue a rubber duck like pic related on top of a hard plastic helmet. I'm a raft guide so the bound as to be very strong, waterproof and resistant to temperature changes. I have epoxy at home but I'm not sure if it will work with rubber. Any tips or advice please?
11 replies and 2 images submitted. Click here to view.
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bond** sorry
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Sugru.?
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Superglue

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So here is the story

I've had a NBA JAM 1991 Arcade cab in my garage for a while and tried to do some fixes without luck.

The former owner said the machine made a popping noise while playing, and smoke came out of the back. When I came to check it, the monitor didn't do jack, only the sound worked. I've replaced fuses, checked the voltage going to the daughterboard and even replaced the flyback but nothing helps.

The daughterboard for the monitor is a Wells Gardner K7000 for those interested, and the whole thing is impossible to do easy maintenance...
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19 replies and 2 images submitted. Click here to view.
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Throw it in the garbage
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>>986361
/vr would have more expertise here. They have two or three guys that actually do this professionally, and they probably have a general thread for this. We only have one guy, and I think he's just one of the guys from /vr
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>>986384
Not true, there are a few more of us.

>>986361
Were any of the fuses blown? Sound is a good sign, but smoke not so much. Check all the components and cabling for charring / scorch marks or post some photos up here. Have you checked all the power rail voltages?

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Thinking about getting into gold panning. Anyone here do it or know about it? I've done it a few times at a really introductory level and am looking for opinions on making it a (somewhat) full-time thing.

Pros:
- Equipment to get started costs very little (~$20?)
- Equipment for more serious panning is still cheap (~$60?)
- Gold prices are extremely high
- Get to be outdoors all day
- It's fairly easy
- I'm an absurdly patient person so this kind of thing suits me
- Might get lucky and find that big nugget

Cons:
- Have to...
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11 replies and 1 images submitted. Click here to view.
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>>986354
1) Tragedy of the Commons. If it's possible to make money doing something, and that something has a very low barrier to entry, then more and more people will do it, until it's no-longer possible to make money doing it. See also Mechanical Turk.

2) The gold you're planning on panning for doesn't belong to you: it belongs to whoever owns the land, whether they're a private individual or the government. You can't just up-and-take it, any more than you can go panning for apples or panning...
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>>986381
>You can't just up-and-take it
You can if you get the prospecting rights. It varies by state but you usually just have to make a trip to the BLM and pay a fee.
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>>986354
>making it a (somewhat) full-time thing
So standing in a creek shaking a plate for 8-12 hours a day is your idea of a good job?

If you really want to mine for loose gold, at least look into a sluice setup or something. Simply panning won't pan out in a financial sense. It's labor intensive and has very poor returns on your time.

File: Rusty lamp.jpg (2 MB, 2480x3508) Image search: [iqdb] [SauceNao] [Google]
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Hey /diy/,

let's pretend you had a rusty steel tile (as displayed) at home and you wanted to make it part of a lamp for your wall.
The thickness of the tile is 0.5mm, it's made of steel and I want it to have holes. I don't care about the shape of those holes, they just have to be there so the light can go through. How do I get these holes into my steel tile? I thought about using acid, but something faster and/or cheaper would be nice.

Any Ideas? Thanks in advance.
10 replies and 3 images submitted. Click here to view.
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>>986281

a step drill or regular drill will be better and more predictable than acid


>steel tile
i've never heard sheet metal called 'steel tile' lol
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>>986287

yepp sorry, english isnt my native language... sometimes it's hard to find a fitting expression.
I fear that I won't be able to drill through steel with this thickness with my amateur gear, that's why i considered acid.
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>>986289
You will be able to drill through that with a cordless drill and a metal drill bit easy.

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