It may be possible that the cord incorrectly on a certain few of these units. It may have ben a situation that the main operator on the station had the afternoon off and the relief operator was not sure how to assemble the cord and made a few incorrectly, but these units went to the market anyway. It would be interesting to see if a dryer purchased somewhere else with a different produciton date would have the same assembly method.
I've noticed the same problem not only with cables, but with the connectors, too, on most consumer electronics equipment such as laptop AC power supplies and various types of displays. Especially for expensive display connectors, we wish we could find replacement connectors to save money, but will probably have to replace the entire cable assembly.
Amclaussen wrote: "At least, a few appliances have cord reels buit into the body of the appliance, which if properly designed and implemmented, will prolong the cord life at least an order of magnitude."
Ahh, but these are subject to a different problem. When done using the appliance, the user tugs the cord enough to releasethe rachet pawl, then releases it. The reel winds with accelerating speed (angular velocity ramps up and effective reel diameter increases as the cord fills the spool) until it is suddenly stopped as the plug hits the housing. This is a great mechanical way to rip the plug from the end of the cord--even better than yanking the cord to remove the plug from the wall outlet.
I had to instruct my late wife to hold the plug and let it slowly feed into the canister vacuum cleaner.
Amclaussen also wrote"If an internal cord reel is not feasible, the designer should at least design the apparauts with the best arrangement of "hooks" to store the cord around the apparatus together with a proper cord attachment and orientation to the body that avoids sharp folds or creases, while providing a neat and practical way to store the cord between uses."
Ahh, yes. These are used on upright vacuum cleaners. Often the anchor point of the cord is not aligned with the hook loop, so there's a sharp cord bend by design. A good feature is that the top hook swivels so you don't need to unwind the cord a loop at a time--just swivel the hook and pull all the cord off. Most folks don't realize that you should wind the cord in a figure 8, crossing over center with every turm. This avoids putting twists in the cord, so that when you drop it off, it falls uncoiled.
I SECOND that emotion! This is especially true in the present time since "smart" phones & EVF digital cameras proliferate to the nth degree. In so many instances of these blogs, while it may be fundamentally clear to the author in describing the problem / fix, when translated into text, there is a lack of clarity. Certain small details are almost always ommitted, but they hold the key to a complete understanding of the situation. There should be an easy method to solve this dilemma.
Cables have always been a problem. They are probablt the most abused item on any device using electricity.
I have miles of somewhat expensive audio cable. The only way that I wrap these cables is the "so called" Firemans wrap, which prevents putting a twist into the cable. Not only does this reduce the damage, but it also means that the cable will lay flat on the ground without a twist in them. I have had to replair very few cables since I started this.
Cables on corded tools and appliances take the most abuse. People wrap them tight without any concern about the tight corners. However, this is more of a problem today than it was 20 years ago. The cable jackets are generally less pliable than they used to be. Vinyl jackets cause the most trouble as when they get cool, they stiffen up and crack. Where they crack is usually where the conductors break. I have repaired many curling irons and hair dryers for my daughters and almost without fail, the problem stems from where the vinyl jacket has become damaged. I started replacing the cable with HEATER cord and found that the cables lasted much longer. Still, proper wrapping would make the cables last much longer.
However, power supply DC cables for laptops seem to fail all the time these days. HP for one has decided that a doubly shielded cable is the answer. These cables fail within a year or so. Even if the owner is careful with how the cables are wrapped, the shields tend to break, or, the inner core, which is about 22Ga snaps. The connectors for the cable are not available at any electronics supplier that I have found, so either the suppli must be replaced, or the connector cut off, stripped of it's connector body, and the wires re-connected to the actual connector. I use a RUBBER BNC slip on strain releast to protect the electrical connections from further damage.
I've seen all kinds of cords fail sooner than later in many kinds of devices.
One thing they all had in common is the Lack of Design/Bad Design of the cord entry to the device or the lack of means to properly store the cord, which causes the cord damage, more than dumb people pulling the cord to disconnect it. At least, a few appliances have cord reels buit into the body of the appliance, which if properly designed and implemmented, will prolong the cord life at least an order of magnitude. If an internal cord reel is not feasible, the designer should at least design the apparauts with the best arrangement of "hooks" to store the cord around the apparatus together with a proper cord attachment and orientation to the body that avoids sharp folds or creases, while providing a neat and practical way to store the cord between uses. This is a matter not only of proper, ergonomic design, but affects safety too. Amclaussen.
I share your frustration with people's behavior. I worked at a shop where the other technicians liked to wrap the test leads tightly around the test meter, causing a sharp bend at the plug-in connector. Every time I used the meter I cautioned them they were going to break the leads and get a false no-voltage reading. I always tested a known hot first when I used that meter, and one day that proved one of the test leads had broken. Even after that, the other technicians still wrapped the leads tightly around the meter.
Linear guides are one of the most important components required for the design of automated or computer-controlled equipment. Aluminum profile extrusions, used for these guides, can enable designed-in functional features.
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