Archived threads in /diy/ - Do It yourself - 601. page

>>958460
Well if you think about gears you can work out the ratio from the number of teeth, this might seem intuitive but you need to know why.
If you think about toothless wheels it's the circumference that matters, twice the circumference means twice the distance and so half the number of turns.

A single start worm has one tooth, but the tooth is wound around the entire length. The tooth is then in a different configuration because the angle of the tooth means you have to angle the gear which is why a worm has to be perpendicular to the gear.
So the number of starts is just the number of teeth.

If you consider one turn of a one tooth worm gear advances the driven gear by one tooth you will see where the ratio comes from.

A two start worm has two teeth that are wound around the shaft.
If you look at the end of the shaft you see they start at opposite sides of the cylinder.
One turn of the worm will advance two teeth of the driven gear because the first start or tooth of the worm advanced one tooth of the driven gear while the second start advances the second tooth.
This is because the pitch is increased to accommodate the second start, the distance between the turns of the first start is double and so it skips a tooth of the driven gear which the second start takes up

Tldr: Starts is number of teeth

Your ratio is the number of teeth in the worm wheel divided by the number of starts on the worm.

The ration you use will depend a bit on how fine of an adjustment you want to achieve, how much space you have for the parts, and how much load will be on them. If you have room for a 50mm diameter worm wheel and a 50kg load you probably want to steer toward a coarser ratio- the teeth in a 60:1 worm set will effectively be twice as thick/strong as a 120:1 set.

A smaller ration isn't automatically more precise than a higher one. But a higher ration will be more forgiving. In a 360:1 set one turn of the worm will move the worm wheel 1 degree. In a 60:1 it will move it 6 degrees. If your method of input to the worm is precise enough (servo with encoder for example) then you might be fine with a 60:1 or maybe even lower. What angular resolution are you shooting for on the worm wheel?

>>958467
Ultimately the antenna mounted on the pan-tilt head will have to track very tiny RF chips over a fairly large distance.
The angular accuracy of the antenna (not up to me) could get as close as 0.1 degrees in theory, only if some advanced design technique actually works, else it's going to be around 2 degrees.
My aim for the resolution of the moving head is therefore around 0.1 degrees and I'm currently thinking of using a stepper motor, since servos have a limited travel, steppers can be geared down as much as I want becaue of their infinite degrees of travel,
At least, that's where I'm currently at with my research.

>>958464
Thanks, especially the part about the starts at the end of the shaft made me able to visualise it and I have a good idea about it now.

Still, would there be any advantage over for example a 60 tooth wormwheel and 1 starts of the worm vs 120 tooth wormwheel and 2 starts of the worm?
The ratio would be the same, but do more starts have some advantage?

Probably rocket candy mixed for slow burning, search youtube, lots of info there.

Sugar and KNO3 or something i dunno, google it and dont use your mom's good saucepans.

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Assuming you have at least a very basic understanding of pyrotechnics,

1 part hard pitch
4 parts antimony trisulfide
2 1/2 parts sulfur
4 1/2 parts ammonium chloride

for ignition material, use 1 part powdered charcoal to 4 parts sodium nitrate. Layer it under the smoke producing mixture.

Country? Have fun getting tags on that "trailer". Where do you plan on charging those batteries? Overall I give you a 0/10 if this isn't a troll post and 2.7/10 if it is.

>>958094
Oh this again.
Well to sum it up: its going to suck balls. Preparing food, going to the toilet, sleeping, cleaning yourself, having a social life, storing stuff; its all going to suck. Why are you doing this? Just apologize to your parents and they may let you move back in. Seriously though, you do not want this.

>>958103
Wut? Its just my base. I dont need to charge batteries yet as i live in a house. I will worry about that later.

>>958106
Well at the very least its an experiment. Im doing this because i believe technology has advanced enough to the point where i can make all of those tedious tasks manageable.

Even if this doesnt work out, well, i only spent a little more than $500. Ill take it farther if it works out like i planned.

meant "hardiplank"

>>957777
Have a home inspection done (you are doing that, right?) and it should point out any obvious problems or troublespots assuming your inspector has half a brain.

If the water heater and HVAC units check out, keep them. The water heater could be a concern from a failure/leak standpoint, but get the HVAC stuff serviced if you're worried about it breaking down. Do remember to replace filters on the furnaces.

Probably your biggest enemy is going to be water. You've already noted the gutters. Personally I keep trees the fuck away from any place I'm living; they give you nothing but trouble. They will fuck up your gutters if they are too close. You shouldn't have a problem cleaning them out with an extension ladder, have a buddy help you. Check around the perimeter to make sure water runs away from the house, not towards it. Again, your inspector should point stuff like that out.

As for cat hair, just clean like a motherfucker with a HEPA-filtered vacuum cleaner. And use good filters in the HVAC system.

clean, a lot

-change the furnace filter(s) regularly during the time it's being used
-get the ducts cleaned to remove old dirt
-if there is a dryer, once you get a dryer, vacuum the lint out the dryer/vent pipe
-if there are drapes/curtains/anything that might . might want to have them cleaned

-I'd highly advise checking out the insulation situation asasap; that's one of the best investments you can make

-make sure you know where all the shutoff valves are for when the **** hits the fan

>>957496
Just use regular paint and tell people it's eco-paint.

>>957496
>paints
>flags

don't use paint, cut out and sew.

if you want to use paint i suggest you use water based paint. not oil based paint.

also

>protesting
you realise you are just wasting everyones time and taxpayer money. you should have protested to your representative. if you did then sorry but tough.

>>957498
yes but we wanted to make our own paint, a friend gave me a recipe but it takes almost 50 eggs and the majority of us are vegans so we dont want to use the eggs..

We have been working "with" our governement, we have made a petition and yes :/

Not a home improvement person by any means but if I remember right you should be able to get a decent estimate by tapping lightly on the wall with a hammer or something. The sound over a stud should be noticeably different than hollow sheet rock. Not foolproof but a good help.

No, get a stud finder.

Theres a couple ways, but studfinders are like $5.

Get a strong magnet, once you find where the drywall screws are, you'll know thats where they're screwed into the stud. Hopefully the contractor wasn't as cheap as you and put a screw every foot.

>>957061
>a good product I can use?
A belt sander?

>>957062
Pretty much this. Take better care of your shit op.

I take good care of my stuff, my mom put it outside and I have no idea what she did with it

Is there really no other way I can fix it? Maybe there's a wood cleaner or something like that

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never done it for the N64 but for other systems, all i did was unsolder the ROM, then put in an IC socket so i could plug in the same ROM or any other of the same size.

So I need to take out the circuit board and unsold error the rom on it

>>956994
That's the gist of it, yes. You gotta make sure that the new rom is compatible with the donor board, so to speak. If you're gonna burn the same game on the new IC then you've nothing to worry about.

>>956784
fuck you for wasting 4 mb of my bandwidth for a shitty picture of you stupid cup.
also what kind of fucked up outlet do you have?

>>956784
Those are literally designed to be opened. You are a dimbfuck for not being able to figure it out.

>>956820
not all of them are. break it. glue it back together.

>>954976
Check the cloudynights.com classifieds such things aren't uncommon there, eBay may have something too, plenty of cheap mirrors and such from China.
Though desu grinding such a small mirror, especially at a long focal length, will take very little time as it will be a pretty flat mirror, and there will be little need to parabolize it. Even basic window glass of some thickness would be fine.

>>954976
I got a 4.5" reflector with a secondary for $20 on eBay.

>>955194
New or used?

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>>948076
You can really use just about any cut of meat you want. With fatter cuts, you'll have to trim more fat off, though. Top round and bottom round work well. Experiment with whatever you can find. Even if it isn't optimal, it should still be edible.

I don't know about the UK, but in the US random cuts of meat go on sale pretty often.

I just hope the quality of UK beef is better than the quality of UK sausages~

>>948076
>Over here a 50g bag costs about £2.30 in stores, how close could I get to that price with homemade?

I can't do the math right now, but buy some meat, weigh it, and then weigh the resulting jerky. Frankly, in my experience, homemade jerky isn't much cheaper than buying store bought jerky.

>>948076
You can't just make jerky and sell it. In order to sell foodstuffs in the UK there are significant regulatory hurdles negotiate. You can't easily just do it in your home kitchen. Do you have substantial financial backing for this venture?

>>947717
*interested

Not sure how that happened.

Bulletproof is a generic bullshit term. Do you intend to get shot with a BB gun or a .44 magnum? Because there is a fucking difference.

>>947721
It doesn't really have to be high calibre safe. Im thinking 9x19 or .40. Definitely not interested in airshit, but if the methods are similar I'll look at it.

if it really does have dead rat juice soaked through, no scrubbing is going to do it

it shouldn't be that difficult to cut it out and make a patch to fit

>>957642
Should I try to get as much of my ceiling replaced as possible? Does dead rat juice have poisonous fumes and has it likely been extending its radius beyond what I can see from below?

>>957646
if there isn't any other visible damage, I don't think that would be necessary

no, I slightly doubt it...
does it smell? is it actually wet? if there was a rotting rat, I would think you'd know it for sure....dead mice stink

if it's a water leak, that would be something to be worried about

cut it out and find out what made the stain

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>>957420
Like with sono tubes? Yes, but you need to water proof them so they last longer than a day.

https://www.youtube.com/watch?v=T4RudTL458Y

>>957426
I do not have any sonotube but I have lot of boxes . CAn I wax box and waterproof ?

>>957450
You sure can try. But you also must reinforce box. Otherwise it will collapse.

I think it's going to be sad not seeing karis boobs all the time.

>>956999
previous season had more episodes, too bad about the short season.

>>957001
Maybe without a steady paycheck she'll do humiliation porn. That'd be nice.