A bunch of years ago (summer 2000 or 2001) I participated in the splicing of the Superstar chair at Killington and that winter a became very aware of where the splice was and it seemed to be rather uneven and I was wondering if anybody had information on whethere the splice flattens out over time or whether it stays rough like that. By the way participating in the making the splice and putting it back together was a real treat for any of you that haven't done it.
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Splicing
Started by Guest_skisox34_*, Oct 16 2006 08:07 AM
9 replies to this topic
#2
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Posted 17 October 2006 - 04:48 AM
What do you mean by 'uneven'? It could be that the tucks are high, the tails may have been wrapped to where they're bigger than the core they replace, etc. The splice area does not 'flatten out', either; if anything changed in the splice area once it was under tension I have a feeling something would be wrong. Norm- any thoughts from a pro?
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#3
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Posted 17 October 2006 - 05:11 AM
liftmech, on Oct 17 2006, 08:48 AM, said:
What do you mean by 'uneven'? It could be that the tucks are high, the tails may have been wrapped to where they're bigger than the core they replace, etc. The splice area does not 'flatten out', either; if anything changed in the splice area once it was under tension I have a feeling something would be wrong. Norm- any thoughts from a pro?
Depending on the splicer, the rope age, weather on the day of splicing even the rope type you can end up with high stranding in the splice area as well as rough tucks, while they do not always look good if there is no abnormal movement in the tucks all should be ok.
Has anyone out there had anything to do with Fatzer ropes that have the yoda material in the valleys?
#4 Guest_skisox34_*
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Posted 17 October 2006 - 08:04 AM
ya sorry i meant rough, not uneven. Since it was a detach lift I was also wondering whether a rough splice if a grip tried to attach itself there whether there was a chance it would fail?
#6
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Posted 17 October 2006 - 10:16 AM
ccslider, on Oct 17 2006, 12:43 PM, said:
What are you experiencing?
Not really experiencing anything, just wondering if anyone else has any experience with this material.
The new tram system in Toronto at the airport has this rope being useed in a jigback configuration and there was some initial problems with the yoda material staying in at the splice area.
The Fatzer splicer had some trouble with this, Norm reworked it and they are having better luck. just wondering if this configuration is being used in other applications? Wondering about how this material would work in a skilift application, and if the cost would be worth the benifits of this style rope, better yet what would be the benifits?
I know why it was used in Toronto, does anyone think it would be worthwhile to use it around, lets say a mountain village? On some of the big ropes the white noise can be high.
#7
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Posted 17 October 2006 - 10:40 AM
The only other jota rope being used in north america that I know of is the gondola system at Telluride. There is more info in an other thread from about a year ago
A slightly larger tuck can cause rope position fults when a grip clamps directly on it but grips are desgned to handel this
A slightly larger tuck can cause rope position fults when a grip clamps directly on it but grips are desgned to handel this
#8
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Posted 17 October 2006 - 02:07 PM
what I mean is the bulge in the rope at the tuck some times causes the grip to hit the grip position switches, I have seen this happen on flyer a few times when I ran that lift. Excessively large people loaded on one chair can get the rope position switch to trip too, under the right conditions.
#10
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Posted 25 October 2006 - 07:24 PM
The ropes with the JOTA inserts are application specific. They are currently primarily used on airport people movers due to the high speeds and the need for a quiet, vibration free rope. The jury is still out on its use for ski areas. Telluride has three ropes with earlier jota designs and unfortunately, the jota inserts broke at the neck locations in the valley rather rapidly. Once a length of jota is out, rope vibration increases. An interesting observation while testing ropes electromagneticly, the overall majority of jota damage occurrs 200 to 300 meters ahead of the splice area. With conventional detachable ropes, higher vibration is also noticed in this area as well. My theory is that strand irregulaties throughout the rope length migrate to the splice area where they can't go any further due to the tucks. In extreme cases (such as improper installation) splice proplems soon develop.
The correct name for the rope is Performa and the jota inserts are derived from the greek letter "I" which is JOTA because of the "I" shape of the insert.
At Telluride, there was a dramatic decrease in sheave wear when the Performa ropes went into service and with newer designs, this type of rope will have benifits for specific ropeway installations.
The splicing is very difficult, but I'll save that for a later discussion.
The correct name for the rope is Performa and the jota inserts are derived from the greek letter "I" which is JOTA because of the "I" shape of the insert.
At Telluride, there was a dramatic decrease in sheave wear when the Performa ropes went into service and with newer designs, this type of rope will have benifits for specific ropeway installations.
The splicing is very difficult, but I'll save that for a later discussion.
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