Sear Mechanisms

I have tried to build a sear system on some of my guns, but it is so hard! I built one that kind of worked but couldn't fit on my new rifle that i just made (i might post but has a block trigger right now). Who knows how to build one of these sears, and is it really worth it? What if a block trigger just works better?

Topic by Mintyhippo   |  last reply

Mechanical iris

I have been looking for a way to create a similar mechanical iris like this one. I tried some things but I'm just completely lost on this one. You guys any ideas?

Topic by Leooow   |  last reply

The Boy Mechanic

Found this:The Boy MechanicIf you look at it, it seems old hat, but a few Hidrogen Generators, countless Photo projects, a real cool Turbine, and a pair of Lathe How-tos, along with an Aluminum Casting one, I find it interesting to say the least....And a Stationary windmill, that turns no mather where the wind comes from!

Topic by Edgar   |  last reply

Be your mechanic

Hello to all the magnanimousStudent professors and those who work in their own businesses Do not be tired of your loved ones. My name is Amir 48 years old and I have almost 32 years of experience in mechanical testing of cars in Tehran. I'm very interested in electronics and I repair almost 70% of my belongings But I did not attend classes in any classroom that I learned early. I'm glad to be among you I'm also happy to be in touch with mechanical questions Thank you

Topic by aryyyya1349   |  last reply

New Mechanism!

I made a cool mechanism. I don't know what it can do, but maybe someone will find out. Here is a video. I also updated the pictures and video.

Topic by Mintyhippo   |  last reply

Defence Mechanism

This is a simple structure that goes across your door and if some one walks threw the wire(fishing line)it lainches at that person. There are 2 guns that shoot on on each tower.!@#$%$%& check out my other knex intructibles &%$%$#@!

Topic by RunningBrave   |  last reply

mechanical wave

I'm trying to build a tail of a fake animal, and the tail is kinda long (total length of about 3 feet), I have a 10 pound pull solenoid and I want the tail to kind of do a wave thing, like if you were do a wave with your arms ( not in a group, all by yourself where you hold your hands together, you know what I'm talking about). I know how to do the electronic part of it by sending pulses to the solenoid, but How would I convert that into a believable tail?

Topic by guyfrom7up   |  last reply

theo jansen mechanism

OK, I finally got hold of measurements for theo's strandbeest. these come directly from theo himself which means there accurate however it also means they're not in English. the numbers are there and they're easy to figure out, but it would be nice to know what the paragraph beside them says. so if any can read it, please post a translation. thanks

Topic by budsiskos 

Theo jansen mechanism

OK, I finally got hold of measurements for theo's strandbeest. these come directly from theo himself which means there accurate however it also means they're not in English. the numbers are there and they're easy to figure out, but it would be nice to know what the paragraph beside them says. so if any can read it, please post a translation. thanks

Topic by budsiskos   |  last reply

Mechanical wall sculptures

These mechanical sculptures by Brett Dickins are awesome. I'd really love to see his workshop with a bunch of these moving at once. via BoingBoing

Topic by fungus amungus   |  last reply

Mechanism for mechanical timer

Hello everyone, My wife and I both feed the dog, but we're never sure whether the other's already done it or not.  (the food disappears pretty quickly)  I'd like to build a track with a slider that takes about 10 hours to slide from 'fed' at the top to 'not fed', and make it so that the slider is easy to slide back to the top. What immediately comes to mind is a counter weight escapement mechanism, but I though I'd hit up the brain trust to make sure there wasn't a simpler way to pull this off.  (I could also envision a timer chip hooked to a mechanical release, but I'd prefer to stay wholly mechanical for this one.) Many thanks!

Topic by oldmicah 

Mechanical pencil basics

If you want  to enjoy life, you should make mechanical pencil guns and launchers. All you need to do is take the mechanical pencil out and add springs however you like and you can make a gun thing.

Topic by XxAwesomexX   |  last reply

alternator control mechanism

Im planning for a project on alternator control mechanisms. can anyone provide me relevant ideas about the topic?

Question by Puranjay Menon   |  last reply

Mechanical Engineering Assistance

I am a mechanical engineer and solidworks expert with over 10 years experience in new product design and development. I offer services for hire and free advice when I'm available. Feel free to contact me for advice or assistance.

Topic by lymanjbishop   |  last reply

Alternative Clock-Mechanical

I need to build a device for a competition that can measure time acurate to the tenth of a second, but from its starting position it must be no more than 30cm in dimension, but can exceed that once it begins.  Even if you know of something that can do seconds that would be fantastic.  If you have any ideas or places to find plans please do tell.  IT CANNOT USE ELECTRICITY

Topic by danielsb7676   |  last reply

Mechanisms I've Made

Alright, I'll keep it short and sweet: Catch-up time. Mechanisms from '08-'10, all different versions. Why not a slideshow? 'Cause I hate them. More stuff coming up. Also, these are only a few pictures of each thing, there are many more of each of them (except the mechanical hand, unfortunately).

Topic by DB2016   |  last reply

realistic firing mechanisms.

Has anyone developed a detachable magazine with internal follower mated to a weapon which isolates the cocking and chambering of a round? i.e. the weapon is automatically chambered when the ram rod is cocked.

Topic by the rail man   |  last reply

Handlebar Lawnmower Mechanism

Hello Community, I would like to know if someone has any idea about how to design a mechanism that works like this one:By pressing a button, I should enable the rotation. Whitout pressing, it should be locked.Thank you!!

Question by FedeR3   |  last reply

Firing Mechanism help

I need help making a firing mechanism. I made one of the bamboo stick shooter with a pen and a rubber, but then I taped the whole thing on a tube of paper for stability and aim. Any ideas? Please, if you can, try to make one with mainly paper and no Knex pieces? Thanks in advance if you can.

Topic by cesarpi   |  last reply

New gun mechanism?

Howdy guys, i was looking on making a gun. But me being me, I dont want to make the same as everyone else. Is there a mechanism concept out there that has not been done yet that I could try? Thanks.

Question by Hiyadudez   |  last reply

Alternative clock-Mechanical

I need to build a device for a competition that can measure time acurate to the tenth of a second, but from its starting position it must be no more than 30cm in dimension, but can exceed that once it begins.  Even if you know of something that can do seconds that would be fantastic.  If you have any ideas or places to find plans please do tell.  IT CANNOT USE ELECTRICITY

Topic by danielsb7676 

Rotating stacking mechanism

Hello everyoneI'm working on this project for school but got a problem with the final part. The thing is, we want to have the big panels rotate so they get stacked. Every panel needs to stop a the exact place.Anybody has a idea for this system? It will be run by an electric motor.Thanks EveryboyI have include 2 photos that show what should be happening. Also a zip with the solidworks parts and assembly with mates

Question by JonasV32   |  last reply

DIY mechanical Iris ? Answered

Hello all, Im going to try to make a mechanical iris out of wood and make it the lid to a box type thing, as seen here, but i need a diagram or outline of what one of the shutter pieces looks like, I would like there to be only 5 shutter pieces, and i would like it if they didnt over lap each other, but any diagram of one might work, PLEASE HELP if you can. Thanks! ~captain molo

Question by Emsaid   |  last reply

Redirecting a mechanical force? Answered

Hi, im looking for some help with a physics/engineering type problem. Im looking for the most effective method of tranfering a mechanical force from one direction to another. For example if i had a 1" horizontal rod struck on its east face which then begins to travel westward on a fixed horizontal track, im looking for a method of transfering the energy (not sure if thats the right word) in the opposite direction. A few important factors are that the rod which is struck does need to travel around 4 inches on the fixed rail, and any vertical movement needs to be kept to a minimum. Below is one of my early ideas, serves little pupose as the mechinism is too large but gives you the jist of what im talking about.

Question by Squibo   |  last reply

Mechanical Cover Flow

I was thinking of a project for a type of shelf for your CD jewel cases. It would be a way of presenting CD covers in a similar way to iTunes 7's cover flow. (see You could mount the cases and have a slider to flip through your CDs. Anyone know how this could be achieved?

Topic by spinach_dip   |  last reply

Mechanical Cover Flow

I was thinking of a project for a type of shelf for your CD jewel cases. It would be a way of presenting CD covers in a similar way to iTunes 7's cover flow. (see You could mount the cases and have a slider to flip through your CDs. Anyone know how this could be achieved?

Topic by spinach_dip 

Help: Mechanical Odometer

I have a bicycle trailer that I use for groceries and such, and hope to use for extended bicycle trips. I would like to get or construct an odometer for the back of the trailer, to advertise how far I've traveled. I've looked around a lot, but have had difficulty finding an non-electric or large-display DIY odometers (ideally, I would like the numbers to be 2 to 3 inches tall, and would like to keep it below ten pounds). I would prefer it to be mechanical only, requiring no batteries or electrical power, but am willing to give on that point for the sake of simplicity of design, weight and cost. If you have any advice where I could find advice or instructions on how I might set something up, I'd greatly appreciate it.

Topic by dreamclassier   |  last reply

A question for experienced mechanics

I  know someone who has a newer model of the Dodge Ram with a Hemi V8.  It has a special gas-saving feature which turns off 4 of the cylinders when it is at highway speeds.  I was wondering if this was a practical idea to do to an old 350 small block.  I know that you could just unplug the spark plugs to 4 cylinders.  Of course, you would have to do something to release the pressure also. (I was thinking of removing the entire spark plug.) I am not very experienced in auto mechanics so I was wondering if anyone here could figure this out.  PS : This option of shutting down cylinders was also available in older Cadillacs I beleive it was called the 4-6-8, which shut down either 2 or 4 cylinders.  This engine however, was known for it's problems, which is why I was wondering about doing this.

Question by jules15   |  last reply

Electronic feeder mechanism

I am currently building a pitching machine (I'm trying to do it for less than $150) and I'm having trouble designing an electronic feeder mechanism that will advance one ball at a time. I thought about cannibalizing a cheap R/C car for a transmitter, receiver, and servo but I'm not sure that will be strong enough to move the prongs when they are under a load. I only have $50 left to stay under budget (I already have all the support materials and the motor/wheel) and I have very little experience with electronic components. It seems to me that a R/C solenoid should do the trick with springs on the prongs to return them to the staring position but my brother tells me that $50 is an unreasonable budget. I really want to get this figured out on the cheap so I can show my brother (the electrical engineer) that it can be done!

Topic by barsmith   |  last reply

An Exploratory Research Mechanism

Designed and Built by Emile Cole Range of Motion Video (profile).... Range of Motion Video (front)....;=E7CEwnOFnCk   Hello all.... I've been working on this (hobby status) on and off over the last fifteen years or so.... a mechanism that immediately begins to rotate in either direction with an imbalancing displacement of as little as one degree. With repeated periodic displacements of as little as five to seven degrees its rate of rotation rapidly approaches about a 100 to a 150 rotations per minute over the course of just eight to ten repetitions, all while overcoming only negligible frictional resistance from the main axel (equipped with bearings). It may have some applications for extracting rotational motion more efficiently from wind and wave and maybe a couple of other things too.... or it may just be a work of art.

Topic by EmileCole   |  last reply

Custom mechanical K'nex?

With all this 3d printing now days, and some of it is being used with K'nex I'm wondering if there are more things that need to be added to the range. Now i can understand that K'nex with its target at younger folks (the highest age they list is 9+) it probably isn't feasible for them to spend the time developing some things. And the things im talking about? Pneumatics More powerful motors Custom gears (sizes, rack and pinion, worm gears) Servos A more dedicated robotics system anything else i may have missed? Just peoples thoughts on whether this is worth pursuing, perhaps even make them for sale (please don't sue me K'nex)

Topic by jjefferson1   |  last reply

Mechanical washing machine.

I work for a charity with Aboriginal Australians in the remote outback of Australia, a place called Arnhem land, it is worth a google. People need washing machines, they buy them, they break , even with warranty cover, they can not be fixed as no service men will come here to service them, we are too remote.  Houses here have about 20 people living in them, there is no work here and people live on small government payments which are not enough to cover daily expenses. Due to the difficulty in accquiring and maintaining a working washing machine, health issues such as Crusted Scabies have taken hold here, and cause much suffering. We can't erradicate the disease here without getting working washing machines. We need a solution, an easy to use, easy to fix washing machine. No electronics. Cold water only is fine. Possibly even hand operated, or wind operated (or other)  I found one which is a plastic  tub which turns with a handle and stands on two feet.  However the construction too flimsy, the tub not big enough for a bed sheet, it was green though. Didn't use electric power. Anyone have any ideas? Know any other sites I could post on to get ideas? Thanks : )

Topic by lisafromnz   |  last reply

Compact bubble gun mechanism?

My 7yo was begging for a bubble gun, and I promised I'd 3d print him one.  To my surprise, there are very few 3d printable bubble machine designs around, and none that match what he wants.  (He wants it to have a handle and trigger like a handgun.)  So, I suppose I'll be designing one. . . (FYI - My parts bin has plenty of fans and motors and even small liquid pumps and I am competent at 3d design. ) My challenge is that the basic rotating disk method of wetting the bubble hoops is both too bulky for a handgun-style bubble shooter, and is highly spill-able. I see online there are numerous toy bubble guns that look like what I want and appear to be much less spill-able.  However, I can't figure out from the pictures how they work, beyond that there is a pump that sends bubble solution to above the hoop and a funnel to route the excess back into the container.  How does the bubble solution get swiped across the hoop reliably? (And, yes, I know it would be easier and cheaper to just buy one.  That's not the point.)

Topic by SvdSinner   |  last reply

Water Release Mechanism - HELP!

I've been racking my brain trying to figure this one out, and thought I'd ask you guys. I'm building a project which requires the release of a tethered "buoy" once this sinkable object hits the water. I know I could use a mechanical release - a water sensing probe that trips a servo release - but I would rather keep it really simple, and use just chemistry and/or physics to do the work, and somewhat quickly, within a minute or two. I'm thinking that something must dissolve, expand or contract quickly when in water so that whatever is holding the buoy to the sinking object releases, and the buoy just floats to the surface. Making a toilet paper "fuse" has come to mind, but I was hoping for something more solid. I considered salt (as formed into a salt lick) but because it's so dense would take a long time to dissolve. Sugar cube seems too fragile? Any thoughts would be appreciated!

Topic by PatrickA117   |  last reply

How to make an old fashion music box mechanism

I am wanting to make an old fasion music box and actually make the music mechanism. I'm not finding anything on line to tell me how to do this and wondered if any of you kind people could help me out.

Topic by Danalou0   |  last reply

How Would I Make a Firing Mechanism for a Catapult? Answered

So I am trying to do this instructable here >> and the author doesn't seem to be answering questions anymore. I am wondering if  anyone else knows what to do with the firing mechanism if using fibreglass pipe. Because if a hook is screwed in it, it seems like it would probably break out of it under the strain. Anyone have any ideas what i could do for the firing mechanism? Thanks!

Question by Tin.Man   |  last reply

Help me identify a part please?

I want to build my wife a drafting table. I really like the style of vintage drafting tables which use this round flat disc as a tilting mechanism, either by having incremental holes drilled in it for pegs, or having a knob-tightened clamp putting pressure on it. Pics included are what I'm talking about Problem is, I can't for the life of me figure out the name of that round metal part, or more importantly, where to buy one. Actually, I have found many names for it, but none of them are of any use to me, because when I google these names in search of a supplier, the results are anything BUT what I'm looking for. Names I've tried: tilt arm slider rail bracket track U-bracket circle iron lid support circular brace These terms were either wrong or perhaps not specific enough to lead me to the actual part. Help?

Topic by Enormous Earl   |  last reply

Strong Egg Timer mechanism?

I want to a mechanism that turns a drum very slowly for a few hours.  It should work just like an egg timer: You wind it up and then it turns slowly. Is there mechanism available that works like this or do I have to built it from scratch?

Question by uwe999   |  last reply

Ibles Robot In Popular Mechanics

Well I was flipping through my August 2008 issue of Popular mechanics, and what do I spy on page 16? The Ibles Robot! In his green sci fair outfit! No idea what he's doing there, and I intend to email PM about it.

Topic by KentsOkay   |  last reply

New Pull-back Mechanism

I invented this new pull-back mechanism a few days ago. It uses a sort of lever to pull the ram rod back. You pull the lever, and the ram rod goes back. It gives you a great mechanical advantage when pulling back. Any thoughts, questions, comments or haikus?

Topic by DRADIS   |  last reply

Mechanical vs Electrical Engineering? Answered

What are the primary differences between the two? Which is a more rewarding career path? Which major is better for someone who wants to get a broad understanding of engineering? Is it feasible to get a double major?

Question by Chikpeas Brother   |  last reply

electronics and mechanics of a cnc machinecan?

So can someone give me a basic rundown of how a cnc machines electronic and mechanical aspects works im just a bit confused and cant seem to find a source to give me information on the subject everyone seems to gloss over it, but if you have a website or pdf or anything that would help thatd be great too thanks in advance!

Question by zaronas   |  last reply

Mechanical Bucking Rodeo Bull

Hey everyone, does anyone have plans or know a website that explains how to make your own mechanical bucking bull? Doesn't have to be as complicated as a proper one, just something to have a bit of fun on, and not too expensive to make. Thanks!

Topic by tapdogs1   |  last reply

knex gun trigger mechanisms ?

What are all the different kinds of knex gun triggers not just block and true triggers 

Question by sonic broom 

project for mechanical engineering student? Answered

I am preparing a project on the topic "necessity is the mother of invention".i am a mechanical engineering student.can anybody give any ideas about what could be done on this topic. i am supposed to register the project unitl 12th plz u ppl hurry ?

Question by coepian   |  last reply

Using "Phun" to simulate mechanisms

I'm not an engineer, and don't have access to Autodesk / AutoCAD, so I've been using Phun to simulate mechanical design.It's not strictly valid in an engineering sense, but it works pretty well for roughing out ideas. The polygons were created in Inkscape, then converted to Phun scenes with SVG2Phun. Some objects won't translate (like grouped objects), so it's necessary to simplify (hence the two images from Inkscape.)

Topic by gmoon   |  last reply

Arduino alarm on mechanical clock

I am new to arduino and I am trying to hook a mechanical wooden gear clock to trigger an alarm or chime when the clock hands hit 12. Does anyone know how I can go about this or any tutorial/instructable that does this or something similar?

Topic by zippystix   |  last reply

Wearable Mechanical Butterfly Wings

I have half an idea of how to make the wings on my daughter's fairy costume work. My ideas involve vairying degrees of a pulley system, springs or rubberbands, and kite string. Any ideas of how to connect the pieces -or alltogether better ideas- would be greatly appreciated.

Topic by mae060669   |  last reply