That is one serious design fault. How can it be in service and how can it be type approved? I’ve heard that chinese companies sometimes fake CE markings, they pretent to be adhering to the conformity regulations but they actually don’t. This lift has that “Aliexpress” quality to it in regards to product safety. I.e. no safety at all. It is absolutely horrible that systems are becoming increasingly dependent on software, that whole Silicon Valley mentality “we fix it with the next firmware update” gives me shivers. I’ve read stories on the software engineering practices at Tesla and I fear that the same software engineering mentality creeps in on safety critical systems. Imagine if lift logic was developed like the GoPro firmware, it would crash all the time!🥶
I'm sure that's why so many lift accidents happen in China. There are improper safety systems which lead to lifts suddenly free falling into the roof while people are getting on. Just because they decided to cheap out/avoid regulations and protocol.
Oof... How software safety killed 3 people Therac-25 had no hardware safety and relied on buggy software. Older machines did have these safety features.
holy shit. that is a serious issue. reminds me of a local company we took over when it went bankrupt: HiQuaLift (ironic, yea) when you turned on the car top inspection, it would still respond to a floor call. i was lucky to have tested the car top stop button before, because that scared the shit out of me. we took all of the lifts with that type controller out of service immediately, until we found a solution for this problem. that can get someone killed. eventually, we let the inspection switch toggle a relay in the controller cabinet, that cut the main lead for the landing call buttons, rendering them unusable.
Loved the diagragm and explanation of the safety relay. I binge your videos but don't know anything about the relays or electric systems involved in lifts, so this is great!. Have you ever seen the Secret Life of Machines episode on lifts? I highly recommened the series to anyone interested in mechanics / machinery.
Question : What if youre inside a elevator/lift and then the safety circuit is broken and youre stuck between to floors? Would there be anyway to get out of here? Let's assume this is an even older lift that didn't got it's emergency phone lines modernized , what would then happen?
If the safety circuit is broken the lift can not move apart from if it is part of the pre-door procedure. There is no way of getting out of a lift if the inner door is locked, or if it is unlocked and you can't reach the rollers.
@@benolifts btw how do you reach the door rollers on euro doors when trapped? (when you have no friend with you) You said in your "detailed look at an ecodisc" vid that you always should check the car top controls before going surfing in automatic.
@@CrazyPlayer-pf2hv In the worst case scenario you would have to climb the shaft. Be careful of the door edges with your hands as they can be like knifes and cut your skin.
The same lift was at Prosper Plaza, a place in Bucharest. When safety bypassing and doing what you did there, it does the same thing. In March 2022, the place burned down, and finally, that piece of shit lift was finally removed! Hope they install a better lift, like a KONE or a Schindler.
Pre door logic used to be common with the relay controlled lifts. I remember one where the brake was not coming on and the lift was ocilating with an almost 2 foot amplitude. What amazed me was that people were still using it, jumping in and out. I informed the building caretaker who turned it off from the keyswitch in the car. I half expected the caretaker to get the rise of his life however the brake came on with the key.
I need to do more tests to find out exactly what is happening. On inspection the lift stops gently using the VF when you let go of the buttons. This is always a bad sign. Also sometimes it shoots upwards unexpectedly.
@@nelsonahlvik6650 Most likely a lot less interesting; the governor would trip before it could overspeed. Or it could change direction and start going up because counterweight.
"Damn, this is taking forever" "Hang on i've got just the thing" *INTENSE SAFETY BREAKING INTENSIFIES* "WHAT ARE YOU DOING?!?" *ding* Floor 3... Doors opening, lift going up "There we go"
Lifts definitely have a 6 monthly independent insurance inspection 2 near me were took out of service for 6 weeks during Covid as they couldn’t get them out to them.
Bruh not only the elevator safety is broken, but also something about the fact that it even speeds up almost twice its limit before stopping. XD Honestly, i when i realized about the speed, i was hoping to see you guys do the same, but on the way down, for the governor to trip. Also, because of this, i think it would be good idea to invent two way governor, just for this specific purpose of it going over its speed limit going up.
@@rsx-797drivelineinstitute8 It's dangerous because when the safety is broken, it should stop immediately. As seen here it took over 3 seconds which is too long.
safety circuit wouldn't necessarily stop him getting crushed, also lift shafts are usually much taller than a person ontop the lift at the highest floor. This is probably clickbait as there are several asian news networks that often lie and try to dumb us down with lifts.
@@jakewynn I live in the same city and it was viral everywhere. It's not a recent news but just told in the comment section. He was repairing the top part where his leg was outside and hip parts were inside due to which he got crushed by the ceiling wall and the elevator which resulted in his death. Cant be a clickbait because saw the dead body and the incident in our national news .
This elevator's safety system is badly designed - if the software crashes while the elevator goes in either direction, the cabin will just keep going. There are many videos of elevator CCTV footage showing such software failure in action. This could potentially the elevator to overshoot the top, or bottom floor, possibly injuring passengers. There's at least one such incident, which happened in 2014. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WrvsfP1PxYk.html - take a note on the floor indicator being stuck at -2 level for a bit until the software realizes the elevator has lost its position, indicated by the dashes on the display.
That video you linked to was not a software faliure. That was a break failiure causing the lift to shoot upwards. This happened because the counterweight weighs about 50% the weight of a fully loaded car, so if there was only one person in the lift, the counterweight would be heavier, so it would fall downwards which would pull the lift upwards. All the other videos you mentioned were probably due to the same reason. The likleyhood of that being caused by software is next to impossible, since it would need to be lacking a proper safety circuit AND have crappy software. Also the lift in that video was going way above it's top speed, which software could bot cause unless it was somhow able to control the brake directly.
Omg Im surprized that omega hasent gotten sued to hell yet because if I was an engineer working on these and I got my hand chopped off Id break absolute hell with them with the casted stump where my hand used to be
I think cheap lifts from China should be banned, because cheap Chinese lifts are most likely absolute shit. Imagine a safety circuit that when it is broken, it makes the lift shoot up before I guess the e-brakes are applied and the lift is stopped.
Oy, hindi kailangan mag-surf ng mga generic lifts dito sa isang tower sa United Kingdom? Talagang hindi pa rin bayaran ng tuition fee, ha? May mga Tiktokers pa kamo!