How hard can it be to put some kind of electronic limiter on a power tool so if you over-stress it, it doesn't consume enough current to melt the coils?
I assume something like this must be done on electric cars, or instead of stalling the engine, you'd wreck the motor.
How hard can it be to put some kind of electronic limiter on a power tool so if you over-stress it, it doesn't consume enough current to melt the coils?
I assume something like this must be done on electric cars, or instead of stalling the engine, you'd wreck the motor.
I had a Yellow & black device once Worx or somesuch.
I stalled it "sort of"
One's wrist forms a perfect albeit painful mechanical fuse :-(
I suppose right handed people have a slight advantage, but drilling with the left hand on the grip ansures that the drill isn't pulled away, it's pushed into your hand.
I'm not talking about little cordless drills, I mean mains powered tools of around a kilowatt. Even if they're cheap, surely these sensors are a fraction of the price of the whole tool, and you'd get so many less warranty returns.
If you have the time and around £60-00, you could buy an overload and JB to keep it in. I think a standard 3 phase overload will work without a contactor and there is some adjustment for FLC.
It would want two of the channels wiring in series for single phase though.
Thermal fuses are fast acting and cheap, a none rewireable from ebay cost me around a pound for 20, they are good although you would have to dsimantle the tool to see if it could be placed in proximity to the field coils.
I've never tried jamming a blade. The drill has a torque setting. But they will all stop with prolonged use. And have to be let cool down. I'm sure that would annoy some pros, but fine for my DIY.
P.S. one of my cats looks like she's having an orgasm rolling around in freshly cut concrete dust. That's gonna take her a while to clean out of her fur....
P.S. one of my cats looks like she's having an orgasm rolling around in freshly cut concrete dust. That's gonna take her a while to clean out of her fur....
A motor can suffer quite a bit of damage during the standard human reaction speed.
Plus there's working it slightly harder than it's designed for. Unless you have a very powerful tool that can easily cope with everything, you're bound to push it just a little bit too far sometimes. You bought a tool for job X, then use it for job Y a few months later, when you really needed something stronger. If the thing just cut out or limited it's own power, there'd be no problem.
You can buy professional power tools with that sort of protection, or you can buy much cheaper DIY tools without it. My Metabo SDS drill has it, but it cost well over £300.
Vastly more expensive power controller than the light dimmer used as a speed control in DIY power tools.
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