Our printer has 3 solenoids, but other printers only one. This part is the most important item to keep intact to make this project work. Next is the other side of the printer. This side is where the active cooling (oxygen providing) solution to the printer can be found, as well as the connections and high voltage contact points for the toner cartridge. Remove these items also. By removing the top we can dig in further and find the laser unit as well as more wiring that needs to be removed. The toner cartridge should be removed at this point if you havent done so already.
AmazonBasics 8-Sheet Cross-Cut Paper and Credit Card Shredder
First: to remove anything we dont need so we have space to mod stuff. Laser printers have many high-heat-generating surfaces in them capable of acting as an ignition source (as my representation friend learned the hard way a 600 mistake ouch). The best practice is to remove all non essential parts if possible. So we started with the basics. We have removed the rear access panel and points fuser in the printer. The fuser is where the toner is bonded to the paper. This occurs under high heat. If fine paper pieces were able to accumulate, there would be a fire for sure. Next up, we will be removing the side panels from the unit. There are a few components to locate and remove: any form of computer processing unit, power supplies, and in this case the stepped motors, as they would be impractical to get running independently on a budget. Items we want to watch for and keep are items like relays and solenoids.
This is basically nothing more than a glorified led flasher, but instead of leds, we will be driving the solenoids in the printer with its output. The speed of the flash (or drive-rate in this case) can be hard set via resistor, capacitor or variable. After some tinkering with a bread board, we chose a basic circuit to drive the solenoids for a feed rate that doesnt overload the paper shredder. We built redundant circuits to control the solenoids on the upper tray and lower tray independently, thus allowing for independent feed rates as well. Disassembly and Preparation: Screwdrivers at the ready! This section is meant to be somewhat conceptual as you likely wont be working with the same printer. Even so, the concepts are really universal in all printers: rollers moving paper, and relays or solenoids feeding the paper into the rollers. We liked this printer because it has a lot of room to work with, as well as being generic enough looking to be cool for the task at hand. The main goal of the teardown is 2-fold.
The paper Shredder (Qty 2 i tried many, many paper shredders out there before i found one i was satisfied with. Believe it or not, i chose a 15 shredder from Wal-Mart in the end. The aurora 5 Sheet Strip-Cut Paper Shredder was the fastest paper shredder I could put my hands. It has only a strip type cutter in it, but thats good enough for what our needs. It also sports thermal overload protection on the motor and will shut itself down before unsafe conditions are met. Not to mention when we are done with the shredder, or it wares out we can return it back to wal-Mart, and there highly trained staff will most likely take it back and refund our money. The solenoid controller: The solenoid controller is the key to this unit.
Paper Shredders home office Electricals - ryman
The motor: For simplicitys sake in this build we will be replacing the existing main drive motor in the printer. The reasoning behind this is the original motor is a stepped motor and it would take longer, and cost more in parts to build a controller for it than it would to replace the motor outright with an ac motor. This motor is actually scavenged from an additional paper shredder that we will be using in this build. The drive shaft of this motor is a worm gear that matched the gearing where the original one had been mounted. As the cost of this motor is the price of the paper shredder, we will it.00. The dc power Supply: One of the reasons for our choice of the printer we choose (excluding the free price tag) was the existing mechanics and the simplicity of operation.
The down side is that we will be stripping all the existing electronics out of the unit, excluding 3 solenoids. We will need a dc based power supply at about 5V to power these units. It just so happened that I had a samsung brick.75v dc just lying around. I really like the shape health and size of this transformer because it is thin enough to be hidden inside the side cowls of the existing space. These transformers are used in all sorts of electronic components and are readily available on ebay for.00.
Most of the time spent (and a good portion of the fun) is actually tearing the printer apart so as to address any potential heat sources and therefore any potential fire hazards (we will still make sure you get to play with fire later). The parts for this build are readily available through several means. We will list the sources and prices for all the parts below. The Printer: This is ultimately the main part of this build. In this build we will be using the xerox 3450/B this is a very capable laser printer at 25 Pages Per Minute.
The lower tray is capable of 500 sheets of paper in both letter and legal sizes. The upper tray is a multi-purpose tray capable of 100 sheets, and is better with thicker materials. The printer retails new for about 500.00 usd, but ebay and refurbished units can range from 200 400. Now, due to time and budget constraints we passed on some of the features we wanted to use from the printer. For instance using the toner cartridge to limit the number of pages shredded and force you to buy a new shredder cartridge, every 50K pages. Or perhaps a printer bios upgrade to even print at all after 250,000 pages.
Paper Shredders, home office - office depot OfficeMax
The ultimate paper jam. About the same time i decided to see if I could find an automatic bulk paper shredder solution for him. Sure enough I was able to find some options, but they ranged from. Obviously that wouldnt do for the creative-minded geek. So after some brainstorming and a lightning strike or two, i had the idea to modify the remnants of the laser printer to fill the role. As this is going to be a volume based solution we needed a robust and well built paper feed mechanism, essay and a solid feed rate. Xerox has built their reputation on the quality and performance of their printers. Of course, with a reputation like empire that, what self respecting modder wouldnt jump at the opportunity to apply a personal spin to it? This is really a relatively simple build.
But sometimes raw unadulterated ignorance can foster ideas just as grand. The idea for this project actually came to me by a mix of forests creativity, and the common ID10T Error. My good friend mike owns a quickly growing software development firm. He also has a mountain of sensitive documents that seems to grow as quickly as his business, piling up next to his paper shredder. Being a small business owner he prints all of his documents in house. Generally speaking ceos and small business owners are not always the most technical of people, so the concept that a laser printer gets hot is not always in the forefront of their minds. After attempting to use a new special plastic based paper, the printer feeding in sheet after sheet and not returning a single sheet, he realized there might be a problem. Upon closer inspection several pages of this special paper had melted in the printer and completely destroyed.
is smoothly taken in with the built-in variable speed motor. The operating noise of new model is reduced from 63 dB of the conventional model.8 db, or equivalent to that of multifunction devices. Time for another flaming monstrosity. How about nice xerox laser printer converted to a high volume automatic paper shredder? This project was featured on 8/3/05 on toms hardwares how to section. Now, here it is, un-cut and un-molested by the toms Hardware editors in all its sarcastic glory! Overview: They say that creativity is the mother of invention.
Because the cutter blades stab the paper in various ways, the paper is torn into pieces of different shapes and sizes. Irring, the torn pieces of paper are stirred. This process reduces the possibility of documents being recovered and read again. Ushing, the pieces of paper are sent to the exit duct in a circular motion, and then crushed by the compressor screw. This tightly compresses the pieces of paper together as moisture in the paper evaporates due to the friction-induced heat caused essay by the paper being crushed by the screw, while the fibers that remain around the edges of the pieces of paper become entangled together. As a result, the torn paper can be easily and efficiently collected, stored and transported, because this compression process prevents the scattering of paper and reduces the volume of paper. 1: Trust-Eco 1500, trust-Eco 1500 (Small-footprint model with built-in collection box).
M: Pocket Resume: Appstore for Android
Office document security has recently attracted much attention in response to many cases of great information leakage. When conventional straight-cut shredders are used to dispose of paper documents containing confidential information, most of the shredded paper is incinerated and therefore cannot be recycled. Fuji xerox has developed a unique "tear and crush" system for its shredders that helps to ensure both the security of documents and the recycling of paper in paper document disposal. In our "tear and crush" system, paper is torn into small pieces instead of simply being cut, thereby leaving the paper fibers intact and not cut off. This makes it easier to recycle paper and enables the effective use of paper that was previously processed as burnable rubbish. 1.Tearing up, as shown in Fig. 1, the star-shaped sharp cutter blades puncture the paper from both the front and rear sides. The paper is then torn up as the blades rotate at a different speed. This process is repeated to gradually tear the paper into smaller pieces.