1210 How To Use A Paper Shredder In A Generator

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[@TinyMaths]

I've actually got a stripped down shredder with its gearbox sat right here under my desk and was looking to see how I can make use of it. I just moved house and on my way back and forth between homes, as per usual, I had my eye out for junked tech; I saw this shredder just sitting there outside someone's house, just left there outside their wall on the pavement. The top was taken off and placed inside the bucket part for the shredded paper; so I took the top part (heavy as hell it was) and once I got it back to my new home last night I did a tear down. I'm keeping your video in my DIY playlist for later reference. Glad I found your channel.

[@samhorowitz7593]

This is an EXCELLENT suggestion! Thank you for this! I'm trying to find as many ways to recover old gear boxes as possible this one is great!

[@jonnyswalk_7]

Just like the “build scenes” on the old A-TEAM tv series 😉 - Thanks Rob 👏

[@chrishayes5755]

love that bearing removal tip! I was going to try to make a bearing jaw puller but thought.. "hmm there must be an easy way!"

[@ThinkingandTinkering]

lol - glad it helped mate

[@Kiyarose3999]

Yes a very sturdy gear box, perfect for a Micro VAWT or Hydro.

[@ThinkingandTinkering]

Yes indeed!

[@AndreaDingbatt]

Hehe, I'm just about to sneak into Hubby's home office.... Lol! Awesome idea Rob, Thank You so much!! Andrea, Jasper and George the Pigeon. XxX.

[@ThinkingandTinkering]

lol - make sure he is not watching lol

[@ezequieladrianminniti6252]

That's exactly the way to go.. 12W just from hand cranking.. image a big rose turbine turning that mechanism at low speeds and high torque continuously.. you are getting there rob!! hehe good vid!

[@ThinkingandTinkering]

awesome mate - cheers

[@scotttovey]

I have an old working paper shredder sitting in a box somewhere. I don't know why I hang on to stuff like I do, but now I have a project I can toy with.

[@ThinkingandTinkering]

always worth hanging on to stuff mate lol

[@kreynolds1123]

An induction motor can be made to generate AC. But it's field coils need to be excited at a frequency below it's driven rpm×(poles/2). The source of excitation can be a capacitor, or an ac source that that accept reactive current such as the grid. So if exciting frequency = 50 hz that's 3000 cycles a second. If an induction motor has 2 poles, the rpm need to be greater than 3000 rpm, or greater than 3600 rpm if the exciting frequency is 60 hz. If the generator is externally excited, it will magnetize the rotor. But if the generator is self excited with a capacitor, residual magnetism is generally sufficient to get it generating, but if not, briefly bumping one coil with current from a battery will get your self excited induction generator generating AC power. Note: AC reactive power fed to an induction generator is technically not consumed. It's like the energy in a water wave bouncing off a wall, and reflected back, while the spinning rotor and the induced current in it due to negative slip generate a rotating magnetic field that in turn cuts the field coils at the exciting frequency, thus bumps the voltage up, that in turn pushes more current and power back to the source, which in turn allows one to draw off some AC power.

[@Teknopottu]

Rob made a video about this. Nice for you to put it in written form with added info. Hope he used more induction motors as generators.

[@kreynolds1123]

@@Teknopottu A difficulty for DIY with induction generators and wind is that wind is variable which would require changing the excitation frequency, or require using a cvt transmission to gear up or down so as to keep the induction generator spinning 5-10% faster than its synchronous speed.

[@Teknopottu]

@@kreynolds1123 That is true. Hand cranking and pedaling on the other hand would be more useful when talking about keeping the right RPM's.

[@ThinkingandTinkering]

I did make a vid on this mate but thanks for adding it

[@ambersmith6517]

Rob is the king of this stuff a great scientist and professor but a induction motor makes a far better generator than a dc motor or any other motor i have found with simple tools you can turn down the rotor to give enough room to epoxy neodymium magnets on to the rotor you spin the rotor on its own bearings by using both motor end case caps leaving out the center the part with the coils you can use a grinder to cut down the rotor while you spin the rotor with a motor drill or what ever a file and sandpaper would work also no lathe needed for perfect out come many smaller magnets works much better than large ones because the magnets need to be epoxied over the iron part of the rotor no magnets over the aluminum part three phase is the very best motors for this but any induction motor will work great the magnets dont have to be really thick i think the iron core of the rotor is being magnetized by the coils still when done this way but not sure i have had great unbelievable results with 4mm thick neodymium motor magnets epoxied end to end side by side along the iron only of the rotor on a 2hp 3 phase motor two fingers just rocking or spining the shaft will light resistive light bulbs like in a microwave or large flood led bulbs i have tried all motors and induction have by far been better than all the others the 3 phase being the best for very low speed no gear box generator the iron part of the rotor is slanted not parallel on the best ones your magnets should cover all the iron part of rotor and none of the aluminum if possible north south north south

[@ThinkingandTinkering]

I am going to do something on induction motors - I have already made a couple of vids about drill them out for neos

[@docsharp87]

Marvelous video my friend!

[@synchro-dentally1965]

Thanks for the video RMS. Excellent tips. Thank you! ps Just a heads up but I just noticed some cripto bots on this comment section promoting eachother. I doubt most of your viewers will go for the bait. I hope YT will start cracking down on them.

[@ThinkingandTinkering]

cheers mate - I will ban them if I see them - a while ago it was a sex channels!! oh my lol

[@tomikoski5124]

@@ThinkingandTinkering Or maybe they were your fans, hot stuff!

[@McRootbeer]

I wonder how the mag assisted flux motor would do as a generator? Wouldn't you be able to tune the output by varying the power in the electromagnets? Effectively an electronic gearing system that can be tuned to either low speed high torque or high speed low torque based on the output of your turbine or whatever provides power. Or am I missing something?

[@ThinkingandTinkering]

that is a really interesting question mate - I will give it some thought

[@jpsimon206]

I think it's worth mentioning that if the gearbox you are using is a worm and wheel design, this cannot be back fed. I just think it's important to note because so many gear boxes work off of this design.

[@ThinkingandTinkering]

that is a really good point mate - thanks for mentioning it

[@percyv5868]

120V* 80mA= 96W..... a nice project .... powerbanks nowadays easily reach 80W- 120W .... no hasle when the power goes down.... a 10W Led bulb is super bright and can get you through the night... without doing exercise with a wrench ....

[@markgeurts258]

80mili amps = 0.08Ampere x 120 = 9,6watt. I think that Robert meant 0.8Amp istead of Miliamps :P

[@Teknopottu]

@@markgeurts258 80 milliamps is what he meant. 96W with hand cranking would be quite hard.

[@ThinkingandTinkering]

9.6W mate - 60W is about all a person can generate from arm strength alone - and that would be gong at it!

[@quantumenergysolutions9128]

Cheers as always! I'm constructing a diy 30 divide urea dry grafoil hho cell , you are a star will let you know how it goes!

[@ThinkingandTinkering]

please do mate

[@angelusmendez5084]

Awesome! 👏👏👏

[@ThinkingandTinkering]

cheers mate

[@adrianevans8304]

sounds like something off crocodile dundee lol sending out a phone call 👍😊👍⚡️

[@christophersparks2646]

YOUR A FREAKING GENIUS!!!!!!!:):):)

[@ThinkingandTinkering]

lol - wow - cheers mate

[@m_IDEX]

This is a Fellowes 220i shredder. I helped design this baby. One of my earliest paper shredder projects. How do you think the cutters are locked on to the tube?

[@ThinkingandTinkering]

oh wow - pleased to meet you mate - press fit I am guessing

[@m_IDEX]

​@@ThinkingandTinkering pleased to meet you too. I love your videos. We expand the tube with a carbide ball thus locking cutters in place. Sometimes if we over-expand the tube, some cutters explode in a rather spectacular fashion 😊

[@michaeln6531]

That is one Hot cup of Coffee!

[@ThinkingandTinkering]

yep!

[@David_Mash]

Which episode talks about the benefits of torque versus RPM when generating

[@stevetobias4890]

A buck converter on that would give you about 8 amps at 12 volts. Very useful power.

[@ThinkingandTinkering]

it is quite a lot of power from hand cranking that's for sure

[@danielade9694]

Since the inside piece has no coil why not work instead of magnets into it by cutting the inner piece to allow magnets to fit and you can turn it into a generator that way

[@thomasmoore4576]

I bet that thing would really crank it out if you put one of those starter Motors on it for a car

[@ThinkingandTinkering]

for sure mate

[@woodlandsdel]

Why not a cordless drill? Has the DC motor and 2-speed gearbox. Plus comes in a variety of voltages.

[@ThinkingandTinkering]

for sure - but shredders also work

[@kanapki4368]

You shoulda just popped some capacitors on the induction motor an make it an induction generator, that would of been way more interesting than you just sticking an dc motor on it :(

[@Teknopottu]

The power needed to spin motor like that under load would be much more than you can spin with your hand. But yeah, it would be great to see Rob use more induction motors with capacitors.

[@ThinkingandTinkering]

nice idea mate - cheers