BOLTR: Milwaukee Dremel 

frother it’s for armchair science.

REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

You watch these without wearing ear defenders? Shame on you.

Love it

Hey! I'm a pinball fixing dude too and I do exactly the same thing!

I laughed out loud when he said that.

I love Matthias too

Money shot, right there. Lmaof.

Shots fired! xD

Eco Mouse I heard Canadians handle fights with good ole feathered pillows

lol aka bottomless pit of a junk droor....

It's only junk when you give up trying to find the missing whatnot.

aka the black holes

incandescent sucks balls though. Compared to led there like gas lamps

I also steal me some SMD resistors while I am there.

Yep, I'm sure (because it's a perm magnet motor) it's a reverse EMF protection diode

lol, i know, I comment before xD Doug Anderson

+What's the geek eager beaver. rookie AvE mistake there. this guys has PhDs. and not, that's not a STD

Thing is the kind of engineering AvE does is more that of the handsomely paid glorified field tech. But we all love how he puts it there for us laymen. Shame it doesn't make it back to the design side. I suppose thats because field tech types don't put up with office B.S. and if stuff was made skookum as frig, bean counters wouldn't like what it does to sales of replacement units.

Yes mosfets have diodes inside but they are a byproduct of the way mosfets are built. Usually these diodes don't have great performance and if you let that diode do the work the inductive kickback makes its way back to the power source (Like you might blow up the rest of the circuitry if you removed the battery while it was running)

i love my samurai out of the many many vehicles that ive owned its prolly my favorite.

in here fish eater countries samurai is usually known as the WORST dirt bike in existence. good to know that when you hear the word "samurai" as in vehicle you don't need to be afraid of your life.

+DJhartson They're talking about the suv not the dirt bike.....

+Yalvan 88 We have the Samurai's larger sibling, the Tracker/Sidekick in 5 speed and 4x4 form and it is really fun to drive.

same here, im only 12 and i own two. one im using for parts, and the other i want to turbo when im done with school. I'm thinking about dropping at 14 to deliver, i think i'd be fulfilled in life.

The word "trigger" triggers me.

shiconia, how do you cope with the word moist?

you ain't kidden about the tenitus. wow that joker is frequency perfect. but still not as bad as sheetrockers running cut out drillamagiggers against steel studs. holy freaking cow , that's the sound inside the gates of hell👹

just imagine if you owned that thing and used it irl

Lunas Eclipse Tools on work tend to make even more noise. That is my irl experience with these sorts of things.

And look at it today. He’s a brilliant creator of so many types of videos.

that is bad ass

atm thats 500 VB"s

Coalition of Rob, about 7 beers with the ridiculous amount of tax you govt applies.

But did you increase the chooch factor by 7?

1300 xxxx in QLD

+AvE i need that cnc machine for uh ..... SCIENCE !!!

+AvE You should review the dremel equivalent of this grinder (probably the 4200) and compare the differences/quality of manufacturing.

pretty sure 2-4 khz is the frequency we hear the best

Old TVs apparently whine at 15625 Hz

Weak gate driver i assume, mosfet gate charge is a bitch

Motor prob. has a _lot_ of inductance, so higher freq. chopping will not be that efficient (motor acts like a low pass filter). Agree tho that it's super annoying. would not buy.

That and most of the losses in the transistor occur during switching. So higher carrier frequency means more on/off per second means more pixies heating things up per second. The inductance btw. is what makes this thing even work. As long as the power supply (the battery) can provide enough voltage, more inductance is better. The low pass filtering is avoided by using a free-wheeling diode in parallel with the motor windings. Basically: High switching frequencies are possible, but require really expensive high-end transistors. So they just don't do it.

.... and they can save even more money by having to buy fewer of the low end transistors because fewer people will buy the tool when they find out about the annoying noise. Sounds like great logic to me. Some kind of pixie logic no doubt.

Fred Flintstone If you're buying a cheap tool, you won't complain about the sounds it makes. High-end inverters use much higher switching frequencies, but the transistors that are the most efficient at those high frequencies are just really expensive.

what was the point of hiding it back then? He talks about Makita all the time?

you gotta look up the datasheet for the lady in question, should have the proper operating temperatures there.

tr0n is correct. Due to this fact, fuck them, go somewhere you want to go. I find that actually does have real world success. They seem to want a man who knows what he wants. Strangely, you being assertive that this is what you desire is what they seem to desire.

you ask and expect an actual answer? you fool!

If your avatar is accurate, this video might be good for inspiration.

lol bunch of dumbasses cant understand sarcasm, like anyone knows the awnser to that...

has to be aviation... ask me how i know.

GUNS please let it be guns, Wait fireworks, food, priests.

Good enough AND its equivalent weight or more in paperwork. I would love to see the building holding the documents for an aircraft carrier. They probably still have to be on paper.

Your obtaining a Festool commercial?

That clearly says more about you then us.

You part of the elite

+MorRobots ?

Nope! I don't google over priced wood working tools enough to get pegged by the algorithm..

i agree completely. i have trouble with the debri getting into my eyes, hair, and mouth. i have a dremmel 3000. but not one of those new ones with the chip board at the back. and i had to get to the tirac chip on the speed control to clean it cause it would skip to full power. and now it doesnt fit right together anymore. the rotor grinds against the other bit now. send help. its misaligned now :(

just add a simple h block between motor and board. plus the required push/hold switch to engage direction. super easy.... But is there room in the case?

it really is that loud, it works great though.

I have a migraine right now and had to turn the volume down when it was running or I was bleeding out my ears and eyes...

i recoment Ears Audio Tool Kit on google chrome. i use it to deess all of my interconnected tubes.

they really sound just like that, dreadful noise and tool in my opinion I would rather use a rotozip.

Weird. Couldn't they just increase the carrier frequency beyond the audible range?

PhattyMo It's nice that they stuck with that arrangement both on SMD's as well as through-hole power packages (TO220, TO247 etc)

I memorized GDS, just say it a thousand times in your head... GDS, GDS, GDS, *G* ate *D* rain *S* ource... GDS.

Good Day Sir

Yeah, I thought it might be there for air flow reasons too. But it looks pretty dodgy as far as those kinds of reasons go. They could have come up with a design intentionally that looks a little better. Hence the inherent doubt that there was intent behind that at all... It was my first thought too though, "Maybe...".

I mean I get that it's ugly, but it's not exactly a visible part unless you got the battery out. No real point in putting holes in a casting as that makes it more expensive to clean n' machine, so why not just some basic right angley bits. But yeah. It's a maybe. I figure if my robo-penis vape-a-ma-tron 9000 has vent holes, other battery things of similar wattage might as well too.

It looks to me like that can't be a mistake. Someone would have to go out of their way to build that notch in the CAD model. Is it not some kind of relief for a matching notch on the battery or something?

That's a good point. It could add stability/prevent twisting.

ikr, he's always talking about shit deWalt cordless screwdrivers, but i would like to see him test the blue Bosch 18v line

If someone buys him a Bosch, I'm sure he'll do it. AvE doesn't get many freebies given to him by manufacturers, for obvious reasons.

i'll get new tools in january, guess i could send him the cordless hammer drill and the normal one but i dont know yet :D

+inthefade we go through tools quite quick. I would take them and send them but I'm skint. UK to Canada shipping ain't cheap. the Chargers go Kaput quite quick~100-200 cycles. the battery drills last~ 6-12months with a couple of brush changes.

What the hell are you doing to it :O mine last 2 years until i get new oney anyways :D

No. What would the need a boost converter for? Also there's no inductor for that. My guess is that they use the second MOSFET as a switchable freewheeling "diode". I don't know what current the motor draws, but considering they picked 200A continuous current MOSFETs it will be quite alot. When switching off, the freewheling diode will have to take the full motor current. Even a Schottky diode can have quite a substantial forward voltage at high currents. Times that by the current and you easily get to a point where the diode will have to dissipate a hundred Watts every time the PWM switches off the motor. The on resistance of the MOSFET on the other hand is a few mOhms (and they still mounted it on a heat sink).

PWM control of a DC motor is basically a buck converter, sticking a mosfet across the flyback diode get you to a synchronous buck so you don't have the loss from the diode voltage

superdau There could be several reasons: 1) There is no feedback sensor on that motor and battery voltage drops with drain. So either you have to account for battery voltage and current in calculating duty cycle necessary or you use a boost to prop up voltage to a specific value and keep it there. 2) Higher voltage -> smaller current -> less plated copper, thinner wires and less conductive heating. It makes sense to boost voltage near beefy battery connectors to drop the current down the line. MOSFET current rating does not indicate the actual current used. They may have picked them for spike currents only and I doubts it's higher than 50A avg. But beefier MOSFETs are also slower, so that would explain a Schottky. MOSFET is not a replacement for a Schottky - the body diode is waaaay too slow and you'll need to actively drive the gate with voltage sensor, i.e. you need an active rectifier. That seems like a lot of work.

the drive for the second fet is simple, the controller just toggles between turning the two fets on, the diode handles the small dead time between the two fets being on

Toggling the two FETs at large currents requires a gate driver both charging and discharging each gate. And the larger the MOSFET the larger the gate capacitance, so you'd need a beefy driver at each. You might be right about dead time.

Sidney Beach as opposed to smart fella? Lol

Why would anyone *not* want to advertise on Storytime with Uncle AvE?

i dont see what they could do youtube technically has not done anything wrong its their platform they can chose what to monetize and what to not

+Robert Willgens People seem to be misunderstanding the issue. RU-vid has always given advertisers the option to opt out of advertising on 'questionable' videos that deal with subjexts like sex, rape, drugs, etc. They do this automatically by looking at the tags and the title of the video, and curse words here also happen to get a video flagged under this category. If less people are willing to advertise on your video, of course you are going to make *less* money off of it. The only reason this is an issue is because of RU-vid's quiet enforcement of it without warning content producers.

What do you mean?

+UndeadKieran I'm saying that as far as I know, videos are flagged so that advertisers can opt out of advertising on them only if they contain curse words or controversial subjects in their tags.

It's midnight on west coast

I thought the same thing

I'm on the east coast, yet I'm confused what he is doing to us?

Because he lives in the middle of no-where Canada and trees don't have the a WIFI signal, so he has to pull out his sled dogs and mush his way to the nearest paved road, then hitch hike to the closest McDonald's to use their WIFI to upload his videos, and even then it probably takes 12 hours to upload it.

Mike Stromecki OMG this is a historic day, another CanadEHn has found this video, which happens to have been made by another CanadEhn. The odds of such a thing happening, which until now have been believed to be astronomically impossible. Just a few examples of the overwhelming challenges that had to be overcome to make this miracle possible, you have somehow despite being separated by 1,000's and 1,000's of miles (oops i mean millions upon millions of kilometers) of nothing but vast frozen ancient pine tree forests. Despite you being buried under 100's of feet (oops i mean 50 meters) of snow. Have miraculously managed to find another CanadEHn's video. I am impressed to say the least sir, and thank you for allowing me to witness the impossible, well done sir, well done. My one regret is not having used this opportunity to buy a lotto ticket, I would be the wealthiest human to ever live. Oh well maybe next time ;-) :-P :-(

+ShadowBanned good thinking. looks like a nice Makita.

It looks like the normal Makita logo to me.

Called "product displacement" technically he can have to pay licensing fees to have their logo in his video if they don't like what he says.

@AvE, can you do a video featuring all of the tools you bothered to engrave your own name on? Assumably, those are the ones you don't want to part with - unless those are just more expensive and you don't want to dip into your beer fund to replace.

Subscribed.