16 replies to this topic

[SkiLiftsRock]

Hello, I have a few questions on some of the meanings for these indicators.

Lift Specs:
Dopp CTEC. HSQ UNI-M version 2

Picture 1: What does C.F Z.F, Synchron Fault, and Rope Impulse stand for? Also Would anyone know what the test switch tests?

Picture 2: How does the lift count Daily Trips? What is making the trips? Also is you were to push the light test button what would happen?
Picture 3 Stop Circuit: What do these terms mean: Carriage Limit, Overcurrent Hydraulic Motor, Fault Safety Valve, PC Low Voltage, Watch Dog, Overcurrent Clutches, and Rail.
Picture 4 E-Stop Circuit: Bullwheel Position, Grip Gauge fwd. rev., Maintenance Lock Out, and Anti Collision System.
Picture 5 Service Stop Circuit: Grounding Rod, { Fuse Failure, Chair Spacing, and Stow.

(Also Would anyone know how the conveyor systems speed works? To me it looks like there is only one motor that runs the system.How do you get the speed of the wheels a chair enters and exits a terminal. Is there more than one motor? Are all the tires hooked together?)

Thanks for reading and all of the information you have to share. :)

Attached File(s)

•  pic-00001.jpg (22.28K)
  Number of downloads: 129
•  Daily Trips-Total Trips-Light Test.jpg (25.87K)
  Number of downloads: 154
•  Stop Circut.jpg (388.42K)
  Number of downloads: 130
•  Emergency Stop Circut.jpg (395.36K)
  Number of downloads: 111
•  Service Stop Circut.jpg (357.13K)
  Number of downloads: 81

This post has been edited by SkiLiftsRock: 10 November 2010 - 04:18 PM

[liftmech]

I'll go backwards. Conveyor systems-- the tires-- are indeed hooked together. No, there's no motor. The tires have pulleys attached to their axles which have different sizes, and belts connecting each tire to the two around it. Since the pulleys are different sizes, the tires all turn at slightly different speeds so as to speed up or slow down the chair. The tire banks are powered off the rope via a set of belts that connect a pair of haul rope sheaves to a set of tires.

Service Stop circuit: the grounding rod is attached to the haul rope in the event of a lightning storm to provide a path for lightning that doesn't include the bullwheel bearings.you wouldn't want it clamped there if you're running the lift, so there's a switch on the storage hook that confirms the rod is off the rope. Fuse Failure is just that; there are fuses protecting the various circuits and they are monitored by the system. Chair Spacing is any time the carriers are too close together. Stow is only applicable in terminals that can store carriers and I'm not certain how it applies to even those. (I'll ask our resident DoppelDude today).

E-Stop circuit: Bullwheel position is a switch that breaks if the bullwheel moves out of what for any reason, such as its mainshaft or bearings failing. Grip gauge monitors the position of the grip on the rope as it leaves the terminal; if the grip isn't fully closed on the rope it trips. Maintenance Lockout is a switch in each terminal that allows me to keep the lift from turning if I'm working on it. Anti-Collision is the system that monitors chair spacing in the terminal; since the chairs aren't on the rope there is a possibility for them to quit moving on a flat tire and have the chair behind run into them. This fault requires you to look at the main anti-collision board to see which zone the affected chair is stuck in.

I'll answer more later, need to go move grips. Joy.

[SkiLiftsRock]

Thanks for that info.

On the conveyor system, has there ever been a tine where a belt broke or the tire popped? If that happened would the lift stop?

[SuperRat]

SkiLiftsRock, on 31 July 2010 - 10:55 PM, said:

Picture 1: What does C.F Z.F, Synchron Fault, and Rope Impulse stand for? Also Would anyone know what the test switch tests?

I'll go for picture 1: These all have to due with the Anti-Collision (A/C) System which monitors the chairs in the terminal and stops the lift if it detects a problem.

A rope impulse is the measure of distance, there is a sheave in the terminal with proximity switches that counts revolutions of the sheave, the same way a bicycle computer works. The computers count impulses to measure distance. A system of proximity switches divide the terminal into zones. The grips trigger the switches as they enter and exit the zones allowing the computer to count the number of impulses it takes to pass through a zone and to locate the chair locations relative to each other.

So... C.F. stands for Counter Fault, meaning a chair took too long to exit a zone which could mean a broken belt, flat tire or some obstruction. Z.F. stands for Zone Fault meaning not enough empty zones between two chairs which could mean a spacing problem.

Synchron Fault is caused by a disagreement between the two redundant lift CPUs.

Belts sometime break but loose belts are more common in my experience. Flat tires are a problem too occasionally but a quick and easy problem to fix. The A/C system is designed to react to these problems. Its also possible for a mechanic to monitor the zone impulses manually to detect problems early. The "Zone Select" dial in Pic 1 allows you to look at the individual zones as the chairs pass. If you know the normal (tight belts & firm tires) number of impulses for each zone you can find zones with early problems by finding high numbers.

[SkiLiftsRock]

That all sounds very interesting. Thanks a lot :)

[SkiLiftsRock]

Anyone else can keep posting too. The information is appreciated :-)

[Skier123]

I'm fairly certain that the light test button simply turns on every single inidicator until it is released.

[liftmech]

Quote

Picture 3 Stop Circuit: What do these terms mean: Carriage Limit, Overcurrent Hydraulic Motor, Fault Safety Valve, PC Low Voltage, Watch Dog, Overcurrent Clutches, and Rail.

Carriage limit-- The lift's haul rope is tensioned by way of a bullwheel mounted on a set of carriage rails. The rails are long enough to allow the rope to be pulled tight. one doesn't want the carriage too tight or too loose, so there are carriage limit switches both in front and behind the carriage.

Overcurrent hydraulic motor-- The tensioning on these lifts is done with hydraulic rams. The pump motor can work too hard, say if its filter is plugged, so the overcurrent monitors if the motor is drawing too much power.

Fault safety valve-- There are several valves on the tension system which allow you to test the system, move the rams forward or back, or block them off entirely. Every one of these valves has a switch to ensure they are in the correct position.

PC low voltage-- The lift's computer runs on 24 volts; if the voltage is too low it has issues.

Watch Dog-- As far as I know most if not all of the relays in the system have an extra set of contacts that feed into the watchdog circuit; if one of these relays is energised but the function it controls still doesn't work the watchdog fault trips. I'm not totally positive this is it, but that's how I remember it.

Overcurrent clutches-- the clutches on the conveyor system are also 24 volts, and if they draw too much they can be damaged.

Rail-- The parking rail has several switches that monitor its position. this way one can't forget to close the rail after taking a chair off.

[SkiLiftsRock]

Does anyone know what the trips counter counts? (Picture 2)

[Keymech]

SkiLiftsRock, on 10 August 2010 - 01:54 PM, said:

Does anyone know what the trips counter counts? (Picture 2)

How many grips have left the terminal

[SkiLiftsRock]

Keymech, on 10 August 2010 - 02:31 PM, said:

How many grips have left the terminal

Thanks

[Counterweight]

I think a "Fuse Fault" refers to the Velocity fuses on the Hydraulic tension system. This fault will not stop the lift of a Doppelmayr. You should unload the lift because you have lost dynamic tensioning.

liftmech, on 01 August 2010 - 04:05 AM, said:

I'll go backwards. Conveyor systems-- the tires-- are indeed hooked together. No, there's no motor. The tires have pulleys attached to their axles which have different sizes, and belts connecting each tire to the two around it. Since the pulleys are different sizes, the tires all turn at slightly different speeds so as to speed up or slow down the chair. The tire banks are powered off the rope via a set of belts that connect a pair of haul rope sheaves to a set of tires.

Service Stop circuit: the grounding rod is attached to the haul rope in the event of a lightning storm to provide a path for lightning that doesn't include the bullwheel bearings.you wouldn't want it clamped there if you're running the lift, so there's a switch on the storage hook that confirms the rod is off the rope. Fuse Failure is just that; there are fuses protecting the various circuits and they are monitored by the system. Chair Spacing is any time the carriers are too close together. Stow is only applicable in terminals that can store carriers and I'm not certain how it applies to even those. (I'll ask our resident DoppelDude today).

E-Stop circuit: Bullwheel position is a switch that breaks if the bullwheel moves out of what for any reason, such as its mainshaft or bearings failing. Grip gauge monitors the position of the grip on the rope as it leaves the terminal; if the grip isn't fully closed on the rope it trips. Maintenance Lockout is a switch in each terminal that allows me to keep the lift from turning if I'm working on it. Anti-Collision is the system that monitors chair spacing in the terminal; since the chairs aren't on the rope there is a possibility for them to quit moving on a flat tire and have the chair behind run into them. This fault requires you to look at the main anti-collision board to see which zone the affected chair is stuck in.

I'll answer more later, need to go move grips. Joy.

[SkiLiftsRock]

Well, thats good to know. If it wont stop the lift then will an alarm go off will the lift slow down? This sounds easy to fix, I could be wrong though....

This post has been edited by SkiLiftsRock: 01 January 2011 - 09:48 PM

[not really a liftie]

Here is a list of all the fault annuciations and their cause  Doppel Lift Fault Annunciations.pdf (369.33K)
Number of downloads: 56 on our 1997 Doppelmayr Detach, not sure what vintage your lift is but most of these should apply.

[SkiLiftsRock]

not really a liftie, on 03 January 2011 - 09:00 AM, said:

Here is a list of all the fault annuciations and their cause Doppel Lift Fault Annunciations.pdf on our 1997 Doppelmayr Detach, not sure what vintage your lift is but most of these should apply.

Thanks for that :) It will give me something to read. I am not sure what you mean by vintage. Are there any more documents like that on the fourm? I can't seem to find them.

[not really a liftie]

Vintage would refer to what year your doppelmayr detach would have been manufactured..... The document is something we came up with at our ski area so Lift Ops would be able to have a little more information to relay to Lift Maintenance when calling in a "lift down". Not sure if there are other similar documents on the site but feel free to search...

[SkiLiftsRock]

not really a liftie, on 03 January 2011 - 09:09 PM, said:

Vintage would refer to what year your doppelmayr detach would have been manufactured..... The document is something we came up with at our ski area so Lift Ops would be able to have a little more information to relay to Lift Maintenance when calling in a "lift down". Not sure if there are other similar documents on the site but feel free to search...

Well, this lift was installed in 1996. Thats a nice document that the resort put together. I see how that could be helpful. I'll keep looking around for more things similar. Thanks :)