Looking inexpensive pnuematic cylinders

I am looking for a source for inexpensive pneumatic cylinders and related goodies, preferably in the Sacramento area. I am not above doing a little demolition work to get the parts ... in fact I rather enjoy it!!  All sizes can be used.

Posted by scotwho 4 years ago


1st time robot. Too ambitious?

Hello All, I have recently started an ambitious project. There will certainly be much learning along the way.  But it is too ambitious? The goal is to build a bot that can be controlled remotely, to aid in the detection, marking, and ultimate removal of unexploded ordinance in Cambodia (in this first application).  Though I have never built a robot of any type, I am quickly learning the basics, but would like ultimate beginner advice if anyone had any.  If anyone would like details on the project, PM me.  It's really a lot for a forum post... If there are any Veterans or military buffs out there, I could really use other first hand accounts of experiencing UEO. Through generous donation and aquisition, I have come cross an electric wheelchair, and many parts needed for a former "Battle-Bot".  Battle-bot turns peace-maker.  I love it!  The motors are Bosche, 24V and ~750watts.  Included were DC motor (high amp) speed controls, and 2x 12v 26A sealed lead-acid batteries.  Very very excited to really dig in.  I lack a quality track or model of a good track to use for traction, etc.  Anyone know of any good and sturdy RC tank tracks I could look at for design or actual construction? Though I began to construct my own track out of sheet metal and various materials available (it actually turned out kinda ok), I don't intend on reinventing the wheel, as it were.  3" took me almost 2 hours. Will also be incorporating a ~3'-4' rotating and articulating arm.  Trying to keep its weight to under ~30lbs.  The wheelchair frame is very strong and moddable, Ws thinking of using a lazy susan type bearing, but I'm not sure I could find one rated for that weight for an affordable price.  Any suggestions? Thanks for checking this out.  Again, if you want more details, I'm happy to share my plans.  Just PM me. This is being designed 100% open-source, and 100% documented with a video and written journal in order to be easily duplicated.   Constructive criticism is NOT personal criticism! Huck

Posted by huck alexander 6 years ago


I Have A Car, You have An Idea?

I am planning to sell this car within a month, but if I can't I would like to do something creative with it, like cut the roof off /demolition derby/something of the like. But I was wondering if anyone on instructables has an idea of what I could do to it. I've been looking at mutant/art cars from Burning Man, and wondering about an armored car or something.. BTW, the car is for sale, $500. Any takers?

Posted by bumpus 9 years ago


Vacant Buildings Painted Blue, Become Tourist Attraction

Some derelict buildings in Rotterdam have just been sitting around awaiting demolition when someone had the brilliant idea to paint them a bright blue. Now they've become a tourist attraction.It's almost as if this was a case of Sim City coming to life where troubled areas start getting color coded. Related:In San Francisco, the vacant Hugo Hotel was converted into an art installation 11 years ago:http://www.flickr.com/photos/tags/hugohotel/ linkvia Neatorama

Posted by fungus amungus 10 years ago


What lubricant to refill a fridge compressor with?

Hey all, I just grabbed a compressor from a fridge that had been badly mangled by a bulldozer at a demolition site, planning to make a vacuum pump or airbrush compressor (or both!) Trouble is, I thought the liquid it contained was leftover refrigerant, and drained it all out. I didn't really have a choice, as leftover freon was gassing out of the compressor (thought it had lost pressure, but there was still a little in the compressor) and it was sputtering the oil everywhere. I held it upside down while carrying it home, and when I got it here, it was apparently empty. Then I found out that what I poured out wasn't liquid freon, but actually vital oil that keeps it alive. The compressor runs fine, but I only tried it for a few seconds for fear of destruction. I have many lubricants here, motor oil, 2-stroke oil, bike chain oil, etc. If I'm to dump an oil into my compressor, any ideas on which is the best call, and roughly how much should it take?

Posted by Rectifier 10 years ago


What New Useful Products Have You Recently Become Acquainted With ?

Here is My list. I recently saw an ible about sugru. Had neverheard of it, before  but can see its usefulness. Kind of expensive and not generally available. Have seen polymer clays, but cant see how it would replace epoxy putty Available at craft shops. Have heard Rescue tape ( fusible silicon ) . I haven't had a use for it, but it seems to be a great repair tape. It was available at Craftwood  Lumber, so it is a mass market product. Expensive, but can see it's potential worth. I'll wait til. I need it before I buy it. The oscillating tools have come down in price. Not exactly new, but extremely useful especially for people whose shop is their desk or kitchen table. If I were to have one power tool, it probably would still be the cordless drill driver. But if I were allowed a second power tool, this would be it. Blades are expensive.  Demolition Bags are very useful and cheap and generally available. I recently saw a device for bending PVC pipe. I have avoided using PVC because of the joints. I prefer thin metal conduit because it can be bent with the pipe bender I was able to acquire. That being said, the Pipe Viper may  be worthwhile. I am considering a small greenhouse made of arched PVV pipe and clear sheeting.  

Posted by Wilmette 5 years ago


Team Fortress 2 anyone?

 Hello! there is a FREE copy of team fortress 2 up for grabs! just leave a comment. I will not ask you for any personal details (if you have a steam account) if you don't have a steam account, then I'll only need your email. if you are one of my subscribers, then you get priority over the non subscribers. (of course click subscribe and you are the first person, then you get priority! then it boils down to who will offer me more stuff such as 5star rating, other subscriptions from you own subscribers, patches, etc.)  now you may want to know why I am doing this. for my birthday present, a user on this site sent me a gift copy of TF2 on steam. he had bought the game a few months before, and it had came with a gift pass. (a full version of the game sent for free due to masses of sales. ) then, as it was still selling so well, I managed to obtain a gift pass for it. but I have noone to give it to. well thats that, and I do not own any of the stuff here, (except for the gift pass) I did not create TF2, I only play it. and to all of you geeks, then this is not an illegal copy, its fully licensed. Thanks for reading, and LEAVE A COMMENT IF YOU ARE INTERESTED!!!!!!!!!!!!!!!!!!

Posted by ~Aeronous~ 8 years ago


Large Boston-Area Cooperative Fabrication Facility Seeks Members

A friend writes:Need to do some machining? How about electronic assembly? Want to join a community of other people who are doing the same sorts of things?A new collaborative fabrication facility is starting up in Somerville, and it's seeking additional members. This will be a nonprofit enterprise, supporting the rental of space and buying additional high-end tools via memberships. A membership gets you access to three different spaces:o A 2500-square-foot wood- and metalworking shop in Union Square, with industrial-sized table saws, lathes, mills, drill presses, grinders, sanders, MiG and TiG welders, and so forth.o A smaller fab shop in Davis Sq with smaller and/or lighter-duty versions of some of the same tools, for smaller projects.o An adjacent space for hacking electronics, soldering, hanging out, using computers, etc. This space is likely to have a darkroom as well.The current plan is to have the two smaller spaces available 24x7, and the larger space available all day and evening but probably not overnight.This venture is just coming up; the spaces will be available for use around Oct 1, and tours can be arranged beforehand. We've had several introductory meetings to tell people about the space & will likely have another one soon if there's additional interest.We're already mostly at the number of members required to break even; additional memberships will help pay for higher-end stuff like lasercutters and so forth. If this turns out to be so popular that the shops are likely to be too crowded, there will be a waiting list for those who sign up too late.Membership prices currently range from $100/month to $1000/year, with various amounts of storage on-site if desired. Membership prices for those who join after the introductory period will likely be higher, to help support buying more expensive toys.Some early pictures of the larger space are below (taken during a tour a month or so ago); not every tool that might appear in the pictures will be there when it opens, and there will be significant improvements in the space sometime soon, but it should give you an idea. The other two spaces don't have photos available yet (in fact, we're currently doing demolition & remodelling in one this week).http://flickr.com/photos/27076997@N00/sets/72157603801290559/https://www.new.facebook.com/album.php?aid=144093&l;=31aac&id;=769825583More info:http://willoughbybaltic.squarespace.com/http://willoughbybaltic.squarespace.com/new/big-changes-at-wb.htmlTo sign up, go to:https://mgarniss.wufoo.com/forms/member-application/

Posted by ewilhelm 9 years ago


TheDunkis's War Game Idea

*=UpdatedAlright well here's an idea I had for awhile and I've posted it in a comment but I wanted to post a topic to see how others like it. Going a long with my style of naming things I'll just call it the TDWG. Please note you may change any number that you like in here. These are just my recommendations. Here's how it works. You'll have any number of teams that will each get a split amount of knex pieces. You'll be given an amount of time say a half hour or so to build up-1. Defenses2. Weapons3. Any other extra things such as traps or ammo holders stuff like that*You'll have to use an honor system (until someone come's up with "Splody Armor") Basically you can set up an amount of health like 10, 25, or whatever and then you assign each type of bullet a damage amount. For example you could say-Green Rod=1Dark Grey=1.5White/Dark Grey+Green Rod= 2Orange connector= 2.5Blue Rod= 3Orange Connector+White Rod (What was going to be the ammo for my repeating crossbow)/+Dark Grey= 3.5Yellow= 4/5Red= 5/7Grey= 6/10The last three rods may be changed depending on your starting health. I didn't want people just making simple guns that shot grey rods to get an instant kill with little effort but I also didn't want to discourage snipers from wasting the extra pieces just to do like 1-2 extra damage.*There are now two different types of ammo: Piercing and Blunt. Piercing are any rounds that have the tip of a rod (or any bow styled tip). They need to hit you with the tip or they only do half damage/ whatever less amount but they also OHK vital organs (Head and heart) and if we ever develop armor they would "pierce" the armor and only have the damage reduced by so much. Blunt rounds would be any connector made bullet. These are like dark greys and orange connectors. They do the same damage no matter how they hit you. They don't "pierce" through the body or armor though. Notice that connectors take up more space in a magazine (even if you add a rod for the tip to change the ammo type to piercing). Also they are pretty much the only ammo a rbg gun can fire which are all almost semi-autos with decent range. I figured this made the ammo types balanced out.~Extras~-The host can select the amount of knex that is used. You could give each team only small amounts so that they use them wisely or give everyone a lot to spam the parts as much as possible.-Fix Mode Basically if any piece is busted off from it's place you are not allowed to reconnect it and must take it out and add a new piece. This requires you to save pieces in case your gun breaks. *-/Medic Mode You can choose one team member to be a medic. They then have to stand by the person for 10 seconds for each health point and if you allow it 30 seconds to revive the person who has second chance perk (which would give them only 10-20% of their entire health so that someone doesn't purposely die to regain more health)-Originality rule. You make it so no one is allowed to use guns on the "banned" list so that we don't see a flood of killerk pistols. You could also make it where they have to build purely their own designs.-Perks (yes I play CoD Too much) Basically each player gets to select one special ability they get for the match. Stopping power would add 1 point of damage to the original damage for each bullet. Martyrdom would let you throw an explosive within meters of yourself when you die. Second Chance would let you lie on the ground shooting your side arm for 10 seconds or whatever your "bleed out" time is set at. In this time you may be revived by a medic. Juggernaut will give you an extra 20% health or so.~Strategies~Alright so here are some things to remember/ take into account/ try out/ blah blah blah/ I'll stop making things up now/ and minute now/ ok I'm done.-You must analyze how much knex the host has given you to make sure you don't accidentally run out half way through building.-Yes bigger ammo means more damage but maybe the bigger pieces are limited? They also take more pieces to make magazines for and need more power for distance.*-Take into account the different ammo types. Rods may be more accurate but you have to make sure they hit the person right to deliver the most damage. Blunt ammo takes up more room but they do the same damage no matter what and can be used in rbg to deliver heavy support fire.-Remember think assembly line. Would it be easier for everyone to make their own guns? It would probably be smarter to have like a couple people make the guns and then another part of the team build a wall or armor for defense.-What kinds of guns should you use? Small guns like pistols generally only use small ammo and thus less damage but you can build more in a small amount of time. Snipers with bigger ammo and longer distances would make awesome weapons when appropriate but take time and pieces. Making support weapons like rubber band powered semi autos offer great support power because they fire fast and have decent power. They take ages to reload and take up many rubber bands so they would be best used in bases with protection. Make sure you have a wide and smart spread of jobs for your teammates. -Setting up mines and making grenades could offer great defensive and offensive support. Throw grenades on charging enemies to make them retreat. The are usually easy to make although the best ones are also rubber band consuming and you'll have a limit to those.-If playing in large areas or better yet, dark areas, it might pay off to have silent weapons so that they don't hear you firing at them.-Set up an explosive environment with knex bombs such as IaC war bombs or DX8 (Compact version coming soon) Suplodies to shoot at to make burst of pieces fly everywhere. Set them up in the middle of the war zone or in areas with a lot of cover to make a no man's land where no one can hide.-Yes if the gun fires shot as in more than one piece of ammo at a time then each piece does the same amount of damage. So if a gun shoots 5 green rods then for each green rod that hits they receive the damage of a green rod. If all 5 hit then they receive 5 points of damage. With the spread of the shot you can dish out a lot of damage on a group of foes. They do usually have short ranges though like real shotguns.-Got any more ideas?Anyways I know there are other guides for things like this but I'll make this just for my game.~Classes~AssaultBasically the ones who get to charge the enemy. They'll fight using generally the "assault" rifles or true shotguns. MedicThe almighty healer of the team. You'll need to protect them. You have the option of giving them the ability to self heal although they cannot fight during this time. They will generally be equipped with light weapons to run around such as pistols and "sub-machine guns" Sometimes can be partnered together with the Support Class.SupportThey usually have the fast firing guns or repeaters with good distance to help suppress the enemies. They usually stay back at base or from a far distance. Sometimes they can be partnered with the Medic class.SniperThis is an obvious class... You hang back either at the base or another sniper point and snipe others. Obviously they are usually equipped with rifles with high power and large calibers. SmithKind of a lowly class. They're in charge of making more weapons and fixing them+your defenses after the building stage is over and the battle has begun. With them being the only ones who can build after the building stage they are more valuable than you think.*DemolitionShotguns and explosives! Basically a more destructive close up version of the support class. Being the pyro-masters they are they can build more explosives with spare parts like the Smith ClassI'll think up other classes later.Personally if I were to be in a battle like this I would probably pick the support class or medic. I'd probably arm myself with the Stg44 and then I'd use the TDS2 or a similar weapon just something small that I can use to defend myself while trying to reload the weapon. I'd probably make a few splody like weapons to lug out.What would you guys be and use? Also what would be your strategies? Most importantly how do you like the idea/would you ever play a game like this? I was just bored and wanted to post this.

Posted by TheDunkis 9 years ago