Understanding CNC

Understanding CNC

Have you ever asked yourself how machines in a factory know exactly when to stop making the parts they’re supposed to make? Well, this is all because of Computer Numerical Control (CNC). But to understand CNC, you have to know what Numerical Control (NC) is.

HISTORY

NC machines were first introduced after the 2nd world war as mass production became the trend. These machines were given a set of instructions in punched cards. However, these machines were hard-wired and their parameters were difficult to change.

These NC machines still required a great deal of human intervention. To illustrate this point, try to take a look at a drill press. A lot of actions have to be taken in order to manufacture a product. The process is actually so complicated that a person has to do something almost every step of the production process. This created an avenue for errors to take place as the likelihood of fatigue increased with the quantity growth.

CNC then came into the picture when computers were introduced. Punched cards were replaced by floppy disks, cables, and other software transfer media. This made it easier to manage and edit data.

Production and manufacturing were revolutionized by the increased automation of CNC machines. These machines allowed a degree of added control over the quality and consistency of the components that were manufactured without any additional strain on the operators. This reduced the frequency of errors and allowed the operators time to perform additional tasks. Furthermore, this automation allowed a greater degree of flexibility in the way components are held in the manufacturing process.

With the advent of Computer Aided Manufacturing (CAM), even programming CNC machines is a snap. These programs actually take the bulk of the programming process to make the operation less tedious. However, to be an effective programmer of CNC machines, you have to know what the machine you’re working on will be doing. That is why machinists are often the best people for the job.

The ease that the machines provide is hinged heavily on the quality of the machine. Low-cost CNC machines oftentimes have many functions that have to be manually activated. High-cost machines, however, are almost fully automated. The operator only has to load or unload workpieces. Once the cycle has been initiated, the operator just has to sit back and watch for any malfunctions. The stress on the operator is so low that some even complain of boredom in the middle of a cycle.

CODING

The programming language that CNC uses is called a G-Code. These codes actually position the parts and do the work. To be able to have a machine work properly, you have to input the correct variables such as axes, reference points, the machine accessories, and whatnot. Every machine has a different set of variables so you have to be careful to take note of the differences.

Aside from the G-Code, logical commands or parametric programming can be used to make the process more time-efficient. This type of programming language shortens lengthy programs with incremental passes. A loop can also be programmed thereby removing the need for coding repetitions.

Because of these features, parametric programming is more efficient than CAM. It allows users to directly and efficiently make performance adjustments. It also allows extensions to the functionality of the machine it is running on.

And that makes CNC.

What are Vitamin Supplements?

What are Vitamin Supplements?

Everybody needs vitamins for the body to function properly
and to stay healthy, among other things. The foods that we
eat are the most common sources of the vitamins that our
body absorbs.

Each food contains a particular vitamin and the amount of
vitamins we get depends on how much we eat of that
particular food. But more often than not, the vitamins that
they provide simply aren’t enough. That is why we need to
take in vitamin supplements.

As its name suggests, a vitamin supplement adds the
necessary vitamins to a person’s diet for the normal
function of the body.

More so, these supplements are needed by people who are
deficient in a particular vitamin because of a kind of diet
that they are taking (as in the case of vegetarians) or
their present condition (such as in pregnant women).

Some of the most common vitamins found in supplements are
vitamins A, B1, B2, B3, B6 and C, among others. These
vitamins are sold in a variety of forms such as capsules,
tablets or gels.

It is said that each form has its set of advantages over
the others in terms of effectiveness in delivering the
vitamins to the body. Their differences will be discussed
in another article.

All in all, vitamin supplements can help us become stronger
and live healthier lives by providing us with the essential
vitamins that we may not be getting from the foods that we
eat.

Just a tablet per day can produce great results on our
bodies if we take them.

Malicious Advertising

Malicious Advertising

Advertising is a necessary irritant in the world today. You can’t drive down the street without coming across an ad, either a billboard suspended over a road or a large poster plastered down the side of a bus. If you walk into a shopping centre it doesn’t matter where you look, you see an advertisement of some kind. Even the tables in the food court now have ads embedded in them, and on my last trip to Melbourne I noticed that they were starting to embed flat screen TVs into the tables to deliver the full commercial experience to your meal. If you jump on the Internet you have to contend with pop-ups and banner ads, with some advertising agents being ruthless enough to write malicious code that embeds the ad into your computer so that you still receive the pop-ups even when you’re not at the original site.
In the past, pop-ups and banner ads have been easy enough to avoid with the right software installed (incidentally, am I the only one who finds pop-up ads that advertise pop-up blockers tremendously amusing?) but now the software developers have worked their way around that little problem. The solution was simple; sell advertising space in your software, not just on your web page.
As much as I like to complain about this new idea, it does come with a significant upside. These days, not all Shareware applications drop out after a limited period of use, nor do they constantly remind you to register. Having ads in the software provides the application developers with the necessary funding to live but leaves the user free from having to pay to use the software. It ends up being in the developer’s best interest to ensure that the user continues to use the software for as long as possible, because that means an increased income. In my opinion this was a brilliant idea, and I wholeheartedly supported it until they started building unblockable pop-ups into the software.
The gaming world is getting in on the act as well, which could be both positive and negative. The Internet provides the functionality for games to constantly update the virtual world with new billboards, TV ads, clothing and so on, keeping the content fresh and the ads current. From an advertising standpoint it’s an amazing idea, people are spending less and less time watching TV and more and more time immersed in virtual worlds. The interactive nature of the ads means that they will remain in a player’s mind for a lot longer than the TV ad break that can be walked away from, flicked over or simply ignored. The game developers on the other hand now have an added source of income, meaning that they can take more risks without the fear of losing money.
Advertising in games is not a new idea, the soft drink ‘7-Up’ created a game many years ago called ‘Cool Spot’, which had the player controlling a red dot with sunglasses in his quest to collect 7-Up logos. The game was remarkably solid, leaving the players to enjoy the game while still getting its message across. I played it a long time ago as a child, but I still remember how much fun it was and exactly what product it was pushing. Pepsi released a Playstation game called ‘Pepsi Man’ that involved a blue and white striped super-hero running around collecting cans of Pepsi. Red Bull got in on the game with ‘Wipeout’ featuring ‘Red Bull’ banners and a loading screen bearing the phrase “Increase your reaction time with Red Bull”. ‘Worms 3D’ featured Red Bull as a power up. ‘Crazy Taxi’ had customers jump in the player’s taxi and holler “Take me to KFC!” or any of the numerous other licensed locations in the game. ‘True Crime’ had the characters dressed in ‘Puma’ attire, with the main character changing his outfits several times throughout the game. Until now I’ve always thought that the ads in games were amusing and, so long as they didn’t interfere with the playing of the game, I was all for them. However, there are new ideas afoot that seem set to change my mind.
The main problem I have with ads in games now is the same as my issue with Pay TV. You’re shelling out a lot of money for a product (new games being sold for upwards of .00 U.S.) and you’re still getting ads. If developers are going to start flooding my entertainment with advertising, I’d like to see a significant drop in the price of games.
The other big issue is that of spyware. Until now, spyware has been a hated part of existence. This malicious software digs its way into your system and collects information about you: your Internet surfing habits, the contents of your hard drive(s) and even the unblocked ports available on your computer. This has lead to the necessity of loading a system with anti-spyware utilities to run alongside the pop-up killers, anti-virus programs, firewalls, registry guards and whatever other protective measures a paranoid PC user has to implement. Now paradoxically, someone has had the ‘fantastic’ idea of building spyware into software, and games in particular.
In the future the games that you’ve just paid such a high price for will sit there monitoring you in the background, watching your every virtual move. Then they can target ads that are more likely to have an impact on you based on the contents of your hard drive or your Internet surfing habits. The best part about it is that as soon as you click ‘I Agree’ and install the software, it becomes legitimate and you’ve agreed for them to access information about you. Many software products already feature clauses in their license agreements that have the user permitting the developers to collect ‘anonymous information in order to provide the customer with a better experience’. The other part of this that irks me is the fact that I’m going to have to have my computer connected to the Internet and chew through my download limit just to play a single-player game.
In the end, I suppose that there’s no way to avoid advertising in our current world. Having it implemented into software and games was simply the next logical step. I suspect that I will be looking to download the inevitable ‘Ad Blocker’ cracks that I imagine will appear shortly after the wholesale introduction of advertising into the gaming industry, but I do believe that with appropriate tact and respect for privacy, advertising could turn out to be a positive addition to the interactive experience.