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It has like a little slot where the money goes down, and the money pushes the slot back, it know how much money it is because it measures how far the little slot goes back. or some go by weight.

A bit of research turned up that most modern vending machines use a technology called "electronic signatures" to recognize coins, but that most vendors don't publish the specifics of their systems in order to limit "hacking" or "spoofing".

In addition to size and weight, coins are distinguished by their metal composition. When passed through a small electromagnetic field each coin creates ripples or other disturbances that can be detected and analyzed. Different combinations of size and metal cause distinct patterns when coins are passed through such a field. The distinct pattern of a particular coin is called its electronic signature. If a coin does not match a known set of signatures stored in the vending machine's computer, it's rejected.

One consideration in a coin's design is whether the signature is sufficiently distinct from other coins that are likely to be used. For example, that's the reason that special alloys were developed for the new euro coins introduced in the EU in 2002, and for the "golden" dollar coins used in the U.S.

Older machines did in fact sort coins by size and weight. In fact, the first known vending machine was a water-dispenser built by the ancient Greek mathematician and inventor Hero (or Heron) of Alexandria. It used the weight of the inserted coin to determine how much water to dispense into the purchaser's jug.

Machines built in the 19th century sometimes used size-sorters to filter coins; they would roll down a track with holes arranged in increasing order of size. The smallest-size coins would fall through the first hole, then next-smallest through the second hole, and so on. Anything that didn't match would be rejected. Others added a kind of ski-jump to help sort by weight - as a coin fell down the track it would have to clear gaps based on its forward momentum. A coin that was too heavy or light would fall or overshoot. Of course these methods relied on the purchaser using only specific

sizes of coins, and could easily be fooled.

20th-century machines used still other mechanical means, including magnets. At first they were used just to detect slugs and washers, but as the technology developed manufacturers realized that even though coins are generally non-magnetic, they would still disturb a magnetic field as they passed by. That technology was the direct precursor of modern signature-based coin acceptors.

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2009-03-22 21:03:14
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Q: How does a vending machine know what kind of a coin you put into it?
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How does the vending machine know the difference in money?

It recognizes the type of cion or bill by the ink or kind of metal.

How does a vending machine know what items sell the best?

it has a scanner

How does a vending machine know to give change?

the machine has a calculator and can tell coins apart

How does a vending machine know when to give change?

It has sensors to know what you put in the machine and a calculator to give change to you in coins.

Where can I learn the ins and outs of having my own vending machine business?

It is important to do a great deal of research before starting any business. For a vending machine business, has a good starting guide for people considering vending machine routes. One might also talk to other vending machine operators to get experienced advice. If you don't know any owners, try calling the number on a vending machine to see if anyone will talk to you. Many vending machine businesses are run by individuals rather than large chains, so you might get the owner directly. Before starting a route, be sure to know how well traveled it is and by whom so that you know if you're likely to earn sufficient income from it.

I live in the philadelphia area and I need my standard change machine repaired. Where can I go, they moved to Indiana?

Didnt know if you meant vending machine change machine, cash register etc.. I assumed a standard vending change machine service. Give these folks a try.

looking for used coke vending machine at out of business sale?

I cannot say specifically if I don't know where you are located.

How do the inner mechanics of a vending machine work?

Saw one yesterday. I think this is how it works. Inside the vending machine, the items are organized in some kind of shelves or rack, or whatever you want to call that. Items are organized in that. Next thing we know that there's some kind of "lift" that will work and pick up the thing that you want. The "lift" will move up and down, left to right. and then drop the thing to the box where you pick it up. of course behind the rack of every column of item, you can find some kind of centrifugal stick that will give a force enough to make one item to be pushed into the lift. Well, this is my analysis after seeing an open drink vending machine yesterday.

For so random scavenger hunt where is the bink boot and last script page for beauty boot camp?

the last pink boot is on top of a black vending machine on the set with all the food in it. It is the vending machine near the exit, where there is a door leading into the chicken set. I dont know where the script page is.

Is it illegal to buy from a faulty vending machine that you know is undercharging?

Yes. Although many opportunists would take advantage of the situation you would be stealing.

What if your drink doesn't come out of a vending machine?

Either the machine wasnt filled/loaded properly in which case you just gave Coke a nice donation because there was nothing to vend. or The product is stuck in the machine and generally gets released when someone else tries to vend that product but it may not necessarily be the next vend, it could be two vends later meaning the third person to use the machine will get 3 Cans/bottles depending on which product you were trying to get. Why do I know this? I know it because ive seen a machine being loaded so I know how they work and because we have a Coke vending machine at work which does this all the time.

How does a vending machine know the difference between a dollar bill?

There are special "scanners" that can tell the difference between, say a five and a twenty, just like the human eye can.

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