1957 Express elevator 2AC shaft

[@LiftsInQLD]

Your videos are awesome! 😃 You'd be surprised how much I'm learning about those units you've posted on your channel. I've seen a little bit of Schindler & Otis machines around and about thanks to technicians, but your videos really do go into detail as to the inner workings of these. As I'm over the ocean in Australia, I don't have that much knowledge regarding Express lifts, for example, so it's always good to see how things vary.

[@philipcollins3849]

I remember back in the day no top of car inspection just a toggle stop switch and no shaft lights

[@liftguy30]

@@philipcollins3849 still plenty out there just like that, some still don’t have pit stop switches

[@philipcollins3849]

Maybe insurance companies are more stringent in the uk or less in NZ

[@liftguy30]

@@philipcollins3849 insurance in this country are not interested in elevators, completely opposite of the UK etc

[@elevatorsinnz]

I’ve filmed that one! I know because of the motor. That one is nice

[@Lift.Tracker]

Why is it that this one has 5 inductor switches compared to the usual 3 if it only runs at two-speed?

[@liftguy30]

@Lift.Tracker ZS does the counting (two pulses per floor) 2US and 2DS does the change over point from high speed to slow speed, and 1US and IDS do the stopping depending on direction

[@Lift.Tracker]

@ I see. So is it because it’s such an old model that they hadn’t integrated both up and down slowing and stopping into 1 inductor, making it have just 3 in total?

[@liftguy30]

@Lift.Tracker correct, to do so required a lot more relay logic and if you had short floors you may need the slowing steps too close together or even overlapping which wouldn’t be possible with only one inductor per direction. Most also had a “2S” inductor for door zone, this one didn’t as the original doors had a retiring cam to unlock them, so the door open circuit was integrated with the lock relays so unless relays “41” and “42” (locks) dropped the doors would not open, so when the doors were modernised I had to install an optical switch to run a door zone otherwise the lift would open the doors wherever it stopped (and potentially rip the landing pickups off if in the wrong place).