Cool stuff man work on a lot older equipment myself here in the states. Can’t beat the old stuff as long as you have prints and can read the terminals.
An interesting gear-less traction machine 4 V belts with pulleys on the motor and driven sheave. Instead of the more common direct bolting of the driven sheave to the armature. It's the opposite of a bench power tool like a lathe motor on top. A small motor, 6HP however running on 400VAC 3 phase 10 amps per phase.
Probably mid 60’s, in this city they used to pull down buildings and reinstall the elevator in another building, many were originally 500VDC and ran off the tram lines, when this power supply was shut down it was better to convert to AC than to install a rectifier as they were huge and expensive at the time
Nice. Why 4 belts instead of one wide one? I can yhink of some pros 4 seperate belts have and of some cons one wide one has but curious what the real answer is
seperate belts provide more traction from 4 times more wedging area, it is the sides of the belts that move the force as they wedge in the grooves. same as the ropes in the sheave, more ropes generally equals more traction (in a v groove not a rifilled sheave)
There is a door for the control cabinet, it’s just against the wall in the video, as for machine guards these are always presented to the owner as safety improvements to keep people safe, not all of them spend the money however
Cool stuff man work on a lot older equipment myself here in the states. Can’t beat the old stuff as long as you have prints and can read the terminals.
Sometimes we don’t even have that and you have to work things out wire by wire.
Love the sound of electric motors and machines, in general.
I don't understand anything that occurred in this video, but I enjoyed everything that occurred in this video.
Old school relay logic. They look like British GPO relays, but I guess they are not.
Very similar but had bigger air gaps to deal with 100vdc (phone are only 48v)
An interesting gear-less traction machine 4 V belts with pulleys on the motor and driven sheave. Instead of the more common direct bolting of the driven sheave to the armature. It's the opposite of a bench power tool like a lathe motor on top. A small motor, 6HP however running on 400VAC 3 phase 10 amps per phase.
There is a gearbox, the belts drive the worm and brake end
Cool! "... just a few oil leaks... 🙂" How old's that???
Probably mid 60’s, in this city they used to pull down buildings and reinstall the elevator in another building, many were originally 500VDC and ran off the tram lines, when this power supply was shut down it was better to convert to AC than to install a rectifier as they were huge and expensive at the time
Nice. Why 4 belts instead of one wide one? I can yhink of some pros 4 seperate belts have and of some cons one wide one has but curious what the real answer is
Those 4 separate belts were probably more readily available than the single. Especially back then whenever it was manufactured.
@@eastender74 yea that's what I figured!! They're also way easier to put on since you fight 4 smaller bands instead of one big one
seperate belts provide more traction from 4 times more wedging area, it is the sides of the belts that move the force as they wedge in the grooves. same as the ropes in the sheave, more ropes generally equals more traction (in a v groove not a rifilled sheave)
@@liftguy30wellington45 oh that's awesome thank you for explaining!! Didn't know that. Thank you :)
Why is it that all the electrics in lift motor room are not enclosed in cabinets?
There is a door for the control cabinet, it’s just against the wall in the video, as for machine guards these are always presented to the owner as safety improvements to keep people safe, not all of them spend the money however