Hi, my drill here failed me. I mean it runs but look Okay, see it stops running as soon as you try to drill with it I took all my tools somewhere and needed to do some major fix and started to drill into concrete and it went like Kept shutting down on me and like a caveman I took my drill bits and started hammering and chipping away at concrete For an hour before making a one-inch deep hole breaking three drill bits in the process In hindsight, maybe I should have run to some hardware store and bought a new drill for like $150 with that kind of money. I would have happily performed Cavemanship for an hour. Come on, man Perhaps I should be nicer to them. I mean it did work for a long time and drilled many holes into concrete and stuff and still half works But they didn't pay me to be nice.
I paid them for this to work. You know who paid me though? My lovely sponsor Brilliant!
Brilliant always drills knowledge into your brain reliably through their thousands of interactive lessons. Start learning for free using my link brilliant.org slash electroboom. More at the end. Okay, let's see what's wrong with it.
It's not truly dead, so there is hope. I would buy a new one if smoke and flames had come out of it, but it seems it works fine if I try to drill soft stuff with it, like a piece of wood. See? Don't hold sh** in your hand when you are trying to drill it. But if I engage the hammer mold, it shuts down.
So it's useless against drilling into concretes and rocks or hard stuff. I'm just happy I'm a content creator. Even when your tools break, you can still make content out of it.
My guess is perhaps hammering draws too much current and maybe the battery is aged too much that the battery voltage drops too far down Shutting down. I do have another battery though. It's the same age But it's very unlikely for two batteries to fail the same way.
Nope, also shuts down Maybe it's the drill itself. Maybe the motor is toast and draws too much current and triggers some over current protection circuit. I can load the motor to draw excess current. I got rock burned by a drill. What nonsense.
I don't think it's over current. It only happens when it's hammering. It's probably vibration then. See when you place the drill in hammer mode if it has it, then it's like jack hammers the bit back and forth into the hard surface trying to break pieces of it off. Absolutely necessary for drilling into concrete and such.
But makes a ton of vibrations. Then perhaps there is something loose in there that disconnects under vibration. Oh, let's take a 12 volt lead acid battery and smash the drill with it.
Ha! There you go! There is definitely something loose in there.
Let's open it up. This should go too. Okay, how do you open this now?
Okay, I have to cut the label in half. Jerry knife. Hey, we are open! Look at this beauty! This tiny brushless DC motor drives the whole thing.
This is super strong and This is the driver circuit for the motor that is completely potted So I assume the vibration doesn't do much on this circuit And this is like a gas pedal for it that you can adjust their speed with and of course the battery And there is a ton of gears in there to slow down the high rpm of the motor into a low speed strong torque And with this switch you can select your gear for lower or higher torque I mean dang man if you have a broken drill like this with functional bits and pieces You can make a car out of it with gas pedal and everything Let's hope we can figure out what's loose in there so we won't have to pay 150 dollars for it Oh! As soon as I wiggle the motor, it turns off. I think I should take the whole thing off of this thing.
It's like a RoboCop taken out of its shell. Perhaps it's these wires? Something about these wires is disconnecting. Damn it, these are all glued on.
Yes, we try to cut the glue off. Maybe I can heat it up and loosen it. Come on loosen up I don't want to melt the connector itself. I don't think it's hot glue, but it is loose.
There we go Some sort of silicon. Get out connector. There we are Is it perhaps one of the wires broken off or maybe this connector solder joints broke off from the board? Let's feel these wires see some of them stretch meaning that the copper inside is broken and the jacket is stretching. This one feels solid solid solid.
This one seems broken. There you go. What this one?
Ah this one is broken too. I guess we try to solder these wires back somehow You know these wires are typically for the Hall FX sensors that a brushless DC motor needs to know the location of the rotor for proper what do you call it? accommodation?
accumulation? Condensation? It's synchronized Things you forget for no reason DC motor structure commutation my god Anyway, I explained how a brushless DC motor works in my... That was a brushed motor. I made another video on...
Well, that was AC motors too. Sh**! I didn't make any videos on brushless DC motors! There is always future.
Anyway, like a regular brushed DC motor, the brushless DC motors need to be commutated properly. And for that, there are Hall effect sensors in there, and these wires belong to the Hall effect sensors. We just solder them back...
somehow. We try to expose the wire copper and the contacts on the connector. In the meantime maybe it's not a bad idea to disconnect the battery.
I'm starting to need glasses. When we solder these back together we just have to make sure we don't accidentally touch them together or bad things could happen. Well these are soldered back. Now the question is will it function without a problem?
I guess... We check the continuity first make sure these two are not shorted. No, they're good. Plug the connector back in connect the battery and Let's smash it $150 in my pocket. Now to make sure these contacts won't touch each other in the future and won't break under vibration We hot glue very nicely between them and all the wires Connect everything together hard so they won't break off easily.
I goopity goop everything together Oops, my goopity goop doesn't fit in there now, does it? Make it a tad slimmer Shove everything in without breaking anything Again, is everything still good? Perfect! This goes on that first, this goes in there somehow. I think I have to turn this a bit so gears Engage.
Maybe I can turn it on like this Oh, there you go! Engage! Now I close it up.
It's in one piece again! Hopefully it'll last forever. Okay, ready?
The battery test Hammer test HAHAHA! And they said I couldn't fix anything right! HAHA!
I guess now we know what's the weakest part of this drill, or any drill or device for that matter, which is the thinnest wires and traces that can break easily under vibration. I would try to protect those thin wires better if I was the designer. And I would try to protect the thin wires in my brain if I were you.
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