So I've been stuck with doing the inventory clerk's job and have to inventory a pile of hydraulic hose and copper cable on reels. Seems easy enough. Pull the hose / cable off and measure it right? Wrong - 500' spools of 1" 2 braid 3000 PSI hose weighs a lot and there isn't a winder in the building. The obvious answer is to use math. I've checked a couple of calculators on line and the answers don't match with the result. In one case the error was around 30% under the actual. (actual was 235', estimated was 165 or something like that)
The basics -
determination of the amount of material for a single layer of material is pretty straight forward,
info needed is diameter and number of wraps that the hose/cable or whatever makes on a single pass across the reel.
The complications start on the subsequent passes.
the diameter changes & therefore so does the length per layer, the material may or may not nest within itself & therefore require a factor to account for the nesting.
This one is way off...
http://www.ingersollrandproducts.com/...ing/winches/drum.htm
Basic brief of the problem
https://www.quabbin.com/...pacity-reel-or-spool
This one says it's doing one thing, but really it's doing another.
http://www.handymath.com/...len.cgi?submit=Entry
The basics -
determination of the amount of material for a single layer of material is pretty straight forward,
info needed is diameter and number of wraps that the hose/cable or whatever makes on a single pass across the reel.
The complications start on the subsequent passes.
the diameter changes & therefore so does the length per layer, the material may or may not nest within itself & therefore require a factor to account for the nesting.
This one is way off...
http://www.ingersollrandproducts.com/...ing/winches/drum.htm
Basic brief of the problem
https://www.quabbin.com/...pacity-reel-or-spool
This one says it's doing one thing, but really it's doing another.
http://www.handymath.com/...len.cgi?submit=Entry