301–310 of 344 posts
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Sure, but then you have to put the counterweight somewhere which would occupy garage floor or wall space. And the counterweight track would have to be enclosed for safety.
It's easy: you dig a deep shaft under the garage and put the counterweight in there. Of course, there may be some cost issues with this solution...
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I once bought a table saw, then watched a YouTube safety video about table saws, and then sold my table saw. I wouldn't even consider owning a lathe. I know my limits, and even the chop saw in the garage gives me the shivers.
If I ever need a table saw I'm getting one of the pricy ones that stops before it chews up your hand[1]. My cousin is a professional furniture maker and lost the tips of 3 fingers to a table saw. It happens quickly. [1] https://m.youtube.com/shorts/vCuLs31fDaQ
The table saw is a great tool, and the safety feature makes sense. Especially for the cabinet saw where the incremental price for a comparable too is not so much - but there are plenty of other power tools that will hurt you just as badly. A router or jointer won't amputate a finger, it will just turn it to hamburger.
No matter the tool, you need to respect it and learn the safety rules.
I had a teacher in high school who was blinded (I think only in one eye) trying to do this repair. You could not pay me enough money to do this repair. >This work is risky, but the risk is comparable to doing your own car repairs, or climbing on the roof of your house to clean your gutters. Notably, "unintentional fall" is the #1 cause of emergency department visits for adults [1], which is why I'd hire a professiona…
I had a teacher in high school who was blinded (I think only in one eye) trying to do this repair. You could not pay me enough money to do this repair. >This work is risky, but the risk is comparable to doing your own car repairs, or climbing on the roof of your house to clean your gutters. Notably, "unintentional fall" is the #1 cause of emergency department visits for adults [1], which is why I'd hire a professiona…
> Notably, "unintentional fall" is the #1 cause of emergency department visits for adults Yes. Until it happens to you, it seems like someone else's problem. I say this as someone who found himself staring at the sky with a concussion and whiplash after the ladder decided to walk out from under me on my concrete walkway. (I'll admit that it was probably my error, but I'll never really know since the ladder took a tri…
Nothing wrong with doing things yourself, but make sure you're following basic safety standards and procedures. And don't do stupid hacks cause the actual tools are expensive. This is how you get injured or killed.
Earlier quoted context omitted.
If I ever need a table saw I'm getting one of the pricy ones that stops before it chews up your hand[1]. My cousin is a professional furniture maker and lost the tips of 3 fingers to a table saw. It happens quickly. [1] https://m.youtube.com/shorts/vCuLs31fDaQ
Wow that was fast, how does that safety system work?
"An oscillator generates a 12-volt, 200-kilohertz (kHz) pulsed electrical signal, which is applied to a small plate on one side of the blade. The signal is transferred to the blade by capacitive coupling. A plate on the other side of the blade picks up the signal and sends it to a threshold detector. If a human contacts the blade, the signal will fall below the threshold. After signal loss for 25 micro seconds (µs), the detector will fire. A tooth on a 10-inch circular blade rotating at 4000 RPM will stay in contact with the approximate width of a fingertip for 100 µs. The 200-kHz signal will have up to 10 pulses during that time, and should be able to detect contact with just one tooth.[4] When the brake activates, a spring pushes an aluminum block into the blade. The block is normally held away from the blade by a wire, but during braking an electric current instantly melts the wire, similar to a fuse blowing."
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A few hundred points accelerating at 1g is still plenty of energy. It also comes with it's own challenges when it comes to releasing it. It also provides a constant force, whereas the force required to raise a garage door linearly decreases the higher it gets. With the consequence that a garage door with a failed motor would slam into its stops over your head rather then into the ground. Followed shortly thereafter b…
Counterweights don’t need to take a straight path to the ground. The force a weight pulls on a surface is based on the tangent.
After seeing that a set of replacement springs from a big box store was under $100 and wouldn't be that hard to do myself, I figured that it would be reasonable to pay an extra $100-200 just to have it done while I was busy with other things.
One guy over the phone tried to convince me that he would need to replace the entire cable system as well and lost any interest after I told him the cables were fine and the spring had failed from fatigue in the hook section where the cable was attached.
Someone else was "dispatched" from a local-sounding number and showed up with out-of-state license plates on his van. He quoted me $800 for the repair. I tried not to be a jerk and told him thanks, but I'll be looking around some more. He then dropped the price to $400, saying he'd do the job for that if he could replace only one spring. After another thanks, but no thanks he became aggressive and said that was a special one-time price that ended when he left my driveway. He later texted me with a $200 dollar price, but by then I had already arranged for someone to do a full conversion to a torsion system for about $500.
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Could it be made of lighter material. Ironic how the garage door is perhaps the most armoured part of a house
Lighter materials that would provide the same level of durability, security, insulation, and fire resistance would be significantly more expensive. No one wants to pay for that.