Don't leave your lift motor room unlocked!

[Ham549]

Why do you need a brake on the motor when it is a worm gear? Shouldn't the break be on the shiv?

[Oli92Technik]

ow i saw a rope on the left side on the counter weight!! this is maybe the govenor

[Oli92Technik]

where is the gouvenour?

[mrmattandmrchay]

@Oli92Technik Good question, and I don't think there is one in the motor room?? There MUST be one, but I've got to admit I haven't a clue where it is!

The only unidentified object is the black box on the floor at 5:30 on the left. Both lifts have one, but certainly doesn't look like a govenor.

[Oli92Technik]

@mrmattandmrchay Ow ok yes this could be the thing in the black box, you're possible right :D but i don't see any thin ropes in the shaft. it's a lil bit strange... it's a O&K lift? i saw the engine in from england

[LondonKilla]

@mrmattandmrchay In the black box there is simply 2 pulley wheels that divert a rope fixed from the counterweight to the safety gear under the car. If the main ropes were to break the falling car and counterweight pull against 1 another via the rope pulling in the safety gear. Clever hey! :)

[Oli92Technik]

yes thats it, thanks so much!

[TheDaniel500]

Is this the old O&K elevators at tescos?

[mas90009]

Why is this thing so slow?

[MrUNIXman]

Cool motor room, very interesting. I wouldnt be able to get up the ladder anyway to some motor rooms so I don't bother attempting.

[AllyMullinsDJ]

I see on the add on PCB there's binary dip switches. that's an everyday thing for me now although I work with DMX Binary dip switches (check it out on google)

[migette1]

First class video, sure glad that door was open,learnt a lot from it. Keep finding doors open much more interesting than just seeing the lift car. Thanks

[Alu10000]

Well IMHO the resistors are used to start up the motor, and then short circuited to get the full speed at the ratings wrote on the motor, as it can be seen in the diagram in the end of the video. To slow down the car the same procedure is made with the low speed windings. The current used by the motor pass through these resistors, so checking the Vr and the resistors values the current can be calculated, checking if it is in overload. PS: sorry for my bad english.

[DutchElevatorChannel]

Another great video!

[harrihealey02]

1:33 LOVE that motor start up sound. These do look alike to your Sainsbury's motor room video.. Oh I see I was wondering what those sausages were doing in that rack, and very hot they were somone must have been preventing the doors from closing! Oh I wonder why they disconnected the battery to the alarm at 2:51

[Balarick]

@harrihealey02 very fun start up sound. long way down to the point of light.  hoist way lights are very bright.. some elevators have front and rear doors. what does that add to the controller?

[leethomas84]

I think I know where these are, awesome to finally see inside this machine room. The last few times I been where i think this is, the RH lift has had it's grills pulled across the door. I though tthey could be modernising it, but maybe it was just out of order.

[TarzanAndConz]

The little unit next to the PLC at 4:26 is a comms module that connects PLCs of the FX series to each other via RS485. Via a protocol called 'Melsec' you can then share part of the data registers between PLCs. That prevents two lifts going to the same floor on a landing call.

[mrmattandmrchay]

@TarzanAndConz Yes, I remember that unit being a PSU and 485 expansion module.

I don't believe these lifts were ever linked together, or if they are then it's a very simply interface. Both lifts tend to respond to all both calls.

I suppose the PLCs were used when dedicated lift controller PCBs (designed especially for lift control) were not around. The manufactures just upload a configuration, probably designed by themselves. No-one probably gave much attention to detail.

[harrihealey02]

Love the shaft view at 11:03 and counterweight rising!

[harrihealey02]

Around 1:52 you can see the brake level pulling in... and what a Super Torque Trislot Induction Motor that start up sounds like! :D 2:14 would have freaked me out when I first spotted it :O hehe and all the papers left on the wall that is amazing and Stannah maintenance is strage but looks like some added electric chips were from them in here, like to the bottom left at 2:57 at 4:33 wonder what that item on the left was that switched off? And that motor at 5:33 is amazing!

[mrmattandmrchay]

@harrihealey02 Yeah, I know what you mean about the heater at 2:14. 80s equipment was never designed to "look nice" and so to were the lifts (which is why I was once afraid of them).

Not sure what you mean at 4:33? :)

[harrihealey02]

OMG... I'll leave full comment in a minute... LOVE this!!!

[TarzanAndConz]

Any photos of the PCBs or schematics you can post on Flickr?

[mrmattandmrchay]

@TarzanAndConz I will definately be doing this within the next couple of days.

[TarzanAndConz]

Great one, as always!

Nice to see the Mitsubishi PLC being used there as that's the brand i use a lot in projects. I have the successor for the PLC in the video somewhere in a box waiting for a project to use it in.

You are very sucessful in finding unlocked motor rooms, but how many locked ones does it take on average before you find an unlocked one?

[mrmattandmrchay]

@TarzanAndConz Hiya. Yes, I didn't expect to find a PLC in this installation, although it was only fitted in 1995. This building dates back to the early 80s.

Finding an unlocked one, it 'about' 1 in 20 maybe? I don't check every one of them as it depends who i'm with (if anyone). This was was up an iron ladder and must be difficult to fasten while balancing on that ladder and the eng got lazy? That's fine with me! LOL

[agoodm]

Why is there a fan heater in the motor room? I will always remember those space age looking heaters from my first experiences of school

[mrmattandmrchay]

@agoodm Yes! I've put an annotation on that now. I used to see these everywhere in the 80s and early 90s. Wonder what would happen if I turned this one on? Probably burst into flames as probably hasn't been switched on for many years.  I too wonder why a "heater" is here? This is not exactly an office!

[sausageroll95]

Hehehe, love the title, a warning to all lift owners everywhere! xD I knew straight away where this was filmed, I wont say anything though xD

[jaymietreadwell]

2:03 - Keighley

2:20 - Looks like it's been maintained by several different companies - Otis, Stannah, Jackson

The PLCs are from Mitsubishi, and I would say either Stannah or Otis installed them - the smaller one looks like it's for part of a safety circuit

I'm guessing these travel at around 0.5 metres/second

I do like the motor sound though. Nice video :)

[mrmattandmrchay]

@jaymietreadwell Yes, and same machine as the one in my "sainsbury's during demolishion" yt vid (they were kayleigh, and same sound also. They are very slow!

watch?v=Oqi0WX1aYCA