Archive for May, 2010

Combination Ladders – Mistakes People Make When Using Them

Monday, May 31st, 2010

Combination ladders may seem complicated to the untrained eye, however, this is just because these people don’t know how to use them properly. Combination ladders are simply portable ladders that are capable of being used as a stepladder or as a single or extension ladder. In this article we will examine exactly how it is used as a stepladder, single or extension ladder, and also the proper safety procedure for the combination ladders.

In order to effectively use the combination ladders as a stepladder it is important to keep in mind that this type of ladder requires a completely level ground for setup. Once you have acquired this you should extend all four leg rails and make sure they are fully extended and secure. This must be accomplished in order to prevent tipping the ladder due to overreaching. Remember to work with your body to keep your stance in the middle of the combination ladders.

There is a certain method for setting up the combination ladders for intended use as a single or extension ladder. So many people underestimate the need for this method. The main point to this method is to place it at the proper angles. If it’s not placed at the right angles then it has more of a possibility to sip from where it’s standing or leaning and cause you to fall. It is essential and recommended to place the base of the ladder from the wall or upper support equal to one quarter of the length of the ladder side rails.

In addition to using the proper setup method according to the type of use for the combination ladders you need to fully understand the proper safety procedure for these ladders. A lot of people make the mistake of just jumping on with out knowing the correct safety technique. It is advised that people that will be using the ladder wear rubber soled shoes for better gripping. Also, remember to face the ladder directly when ascending or descending, and don’t stand on the top two steps because you have a higher risk of losing balance.

If you want to know how to use combination ladders it would be helpful to you to examine how others have mistakenly used it so that you may learn from their mistakes. These ladders can be used as a stepladder or single or extension ladder. If you also incorporate the proper safety procedure for using this type of ladder you will expand your knowledge and be more prepared when using them.

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The Most Memorable 1990s Tennis Players (in My Opinion)

Sunday, May 30th, 2010

Modern tennis has gone through many changes, and the 1990s were the years that served as the transition for this. Racquets quickly went from wooden ones to graphite ones, and much more happened as well.

I’d like to take a trip down memory lane by writing about my favorite five 1990s tennis players. These all come down to my personal preferences and they’re not based on merit. Nonetheless, I’ll be curious to see how these compare with yours.

Andre Agassi is a legend, and one of the best to ever play the sport. Not only did he have a major impact on the way the sport was played, but his fashion sense set the trend for so many great tennis clothes and sneakers.

Pete Sampras is thought by some to be the best tennis player in the history of the sport, even better than Roger Federer. How’s that for a bold statement? If you saw the two play a few years ago after Sampras’ retirement, you might be a believer too.

Another great 1990s tennis player was Michael Chang, perhaps my favorite player to ever play the sport. With his mentally tough approach to the sport and never say die attitude, Chang was a hero.

Jim Courier was one of the world’s best for a short time period, and he was absolutely dominant during the few years that he sat atop the rankings. He burned out early like many tennis players do, but he gave us some great matches.

The last player who I’d like to mention is Alex Corretja, a Spanish player who may have been the fastest player I’ve ever seen during his prime. He’s best known for a near win over Pete Sampras at the US Open, but rose to as high as number two in the rankings during the 1990s.

It was hard to narrow this list down to just five, as there are many others I could have mentioned. How do these players compare to yours?

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What Would Woodworking Be Without Clamps?

Thursday, May 27th, 2010

Sometimes we take for granted the very things we cannot live without. Only, on the rare occasion where one of these things is not present do we realize its overwhelming importance to us. Some of these things are crucial to life support like air, gravity, water, food and even, it could be fairly argued, love. Others, while not fatal to us (if missing) are, nonetheless, crucial necessities to life as we know it. An example of this would be ball bearings which are used in cars, trucks, airplanes, ships, motors and machines. Another, to the woodworker, would be clamps, the subject of this present discussion.

I want to point out that woodworking, as we know it, would simply cease to exist without clamps to hold wooden parts together while we are gluing or otherwise fastening them together. It’s not that there is anything in what I have said so far that is news to anyone. It’s simply a matter of being conscious of the value of things that bless us every day of our lives.

I once sold off the entire contents of a woodworking shop. I advertised each tool individually. The ads were hardly out when I received a flood of calls from woodworkers looking for clamps. I sold all the clamps I had the first day. It was then, for the first time, that I realized how much every woodworker needs clamps. There as many types of clamps as there are ideas of how to glue wooden parts together into projects.

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Main Features of the CNC Milling Machine

Tuesday, May 25th, 2010

Milling machines are a type of machine tools that were used in machine solid materials. This type of machine has an existing two fundamental forms; the horizontal and the vertical form, the terms was derived from the direction of cutting-tool-spindle.

Different from drill press, where in the work piece is held fixed and the drill is the one to move vertically to make a way to the material, milling too involves movements of the work piece adjacent to the rotating cutter, but it is capable of cutting to cut up the sides along with the tips. The movements of the work pieces and cutters are accurately controlled, usually via the precision ground slides along with the lead-screw or with analogous technology. Milling machines can be operated manually, by mechanical automation or by digital automation via the Computer Numerical Control or CNC.

Almost all CNC milling machinery were controlled by the computer vertical mills having the ability of vertically moving the spindle alongside with Z-axis. With this added point of freedom, it allows the use of die-sinking, engraving functions so as 2.5D surfaces like relief sculptures. Once joined with the neither helping conical tools nor ball-nose cutters, it will surely improve the milling accuracy devoid from impacting the speed, giving the cost-efficient alternatives to the majority of flat-surfaced hand engraving works.

CNC machines are able to survive to almost every form of manual machinery like the horizontal mills. Multi-axis machines are the mainly advanced feature of the CNC milling machine, it was added by two or more axes from the normal three axes, the XYZ.

The horizontal milling machine as well has the C or the Q axis that permits the horizontal mounted work-piece that can be rotated and basically permits the asymmetric along with the eccentric turning. B axis or fifth axis manages the tilting of tools by itself.

Once all of the axes were in union with one another, very complicated geometries are able to be made easily with this kind of machine. However, the ability to program the complicated geometry is beyond the most operators’ ability. For that reason, 5-axis mill machines at all time is programmed by the CAM.

Different types of milling machines and the basic parts

* Box or column mills – a very basic bench-mounted machine which features the head going up and down the column or the box ways.

* Turret or vertical ram mills – usually referred as the Bridgeport-type, with spindles that could be aligned to various positions.

* Knee mill or the knee-and-column mill – this is referred to any machine that the x-y tables are riding up and down the line on vertical adjustable knees.

* C-Frame mills – it features knee and set spindle head which only moves vertically.

* Planer-style mills – this is a large mill that was built like planers with the exception of milling spindle in place with the planning head.

* Floor Mills – it contains a row of rotating tables, along with the horizontal spindle fixed on the set of rails which runs parallel above the table rows. These mills are chiefly converted to Computer Numerical Control.

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Tennis Strings Guide – Choosing the Right Strings For Your Tennis Racket

Monday, May 24th, 2010

The quality of the strings on your racket matters, so make sure that you use this tennis strings guide to help you choose the right one. Technically, tennis strings are available with varying thickness that you can tell from their decreasing gauge numbers.

Reading the gauge

The 15-gauge thickness is the thickest string available, which is around 1.41mm to 1.49mm thick. There is also the thinnest string with a Gauge 19 that measures 1mm to 1.1mm. Every gauge also comes with thinner varieties that are determined from the L that is indicated along with it, which means “light”. A higher gauge is generally thinner and it offers more feel and power, while lower gauge offers durability. Intermediate or beginner rackets are better with 15-Gauge strings while professionals can use 16 to 18 Gauges.

Types of strings based on material

A tennis string guide can classify the types of strings based on their material or construction. In terms of material, tennis strings can be nylon, natural gut, Kevlar, and polyester:

Nylon: fairly affordable and suitable for recreational or casual players.

Natural gut: the most expensive that is constructed from animal intestines. These strings are best for touring professionals but they can easily deteriorate with humidity and water.

Kevlar: durable and stiff but are strung with less 10% tension to compensate for the latter trait.

Polyester: durable compared to natural gut but have lower performance, and less power and feel.

Construction

A tennis string guide can also classify the strings according to how they are constructed:

Mono: has surface coatings for durability and are made of single solid fibers.

Ribbon: similar to natural gut but uses ribbons

Multifilament: uses several string materials with polyurethane for impregnation.

CWW: 2 layers of filament with a solid core

CW: and has a solid core with thin filaments and used in tournaments.

Durability and playability

The packages of tennis string usually have durability and playability ratings so make sure to look out for these details and choose one with a suitable balance between these qualities.

Important information

A complete tennis string guide is available PickyGuide, the authority in free consumer advice. Access top-ranked, best-reviewed, and most competitively priced tennis strings in PickyGuide’s recommended products section

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Some Great Exercise Tips To Keep You In Shape For Tennis

Saturday, May 22nd, 2010

As you can see and think tennis is a pretty good sport to do if you are in need of some exercise. It is not a sport that you can just do and then lay around. It is one of those types of sports where when you are playing it you are constantly running and trying to keep up with it. I have played tennis and I know what it takes to play the sport. You do not have to be in top shape to play the sport but if you are going to be actually playing the sport then you need to be able to run quick and get to the ball so you can hit it back. Tennis is a cardio sport and you need to be able to do that in order to play this sport.

If you have the energy to go running or jogging then you have the ability to play a good game of tennis. It is just one of those sports that you need to be able to run and keep up with yourself or your teammate that you are playing tennis with. Running is just part of the game and if you cannot run or jog for at least like 20 to 30 minutes then you are not going to be able to play the game of tennis because it will be too hard on you and you will more then likely get sick. So if you are out of shape then you need to run or jog so that you can get in shape to play the sport.

If you are looking for a nice good powerful swing then you need to work on your abs. you will want your abs to look good and be toned so that you can get a good strong swing. Without a good strong swing in tennis you will not be able to play the sport vigorously so you need to start getting your workout in so you will be able to keep up. If you cannot keep up then you will not be able to stay on the court and your teammate will probably find someone else to start playing with.

Your back muscles will need to be in good shape as well. You will need to basically tone out your whole body in order for yourself to play the sport with style and talent. You will be a whole different player in tennis after you have undergone your transformation. You will be able to play for longer and harder when you are in good shape.

You arms and your legs will be your two main places that you need to keep in shape and keep them doing something everyday. Without your arms and legs you are not a tennis player. After you have toned out everything then you can start to play the sport with fun because you will be able to wing that ball and be able to play the sport.

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How to Make a Miter Saw Table

Thursday, May 20th, 2010

Miter saws can be used in a woodworking shop as a permanently installed tool or on the jobsite as a portable or semi-portable unit. I will discuss the construction of miter saw tables appropriate to both types of installations. The purpose of a miter saw table is two-fold: (1) to elevate the saw to a comfortable working height for the operator and (2) to provide a surface to the left and/or right of the saw for the extension of the fence and to provide support for long materials while being cut. If you have ever tried to cut a 45-degree miter at one end of a 2 x 6 x 12, you know why a miter saw table or roller stand is absolutely required.

Very often, miter saws are used to make repetitive cuts of the same length. Some sort of saw stop comes in handy and greatly speeds production time for this sort of application. A saw stop must mount to something to hold it in place, usually a fence. You can make your own fence out of a very straight piece of wood or metal or you can do as I did and purchase a commercially available moveable stop that slides along an aluminum track that includes a stick-on measuring tape.

PERMANENT SAW TABLE FOR SHOP USE

Since I buy lumber in lengths up to 14 feet long, I decided to build a very long miter saw table in my woodworking shop. You may not have the physical space for this in your shop so you may have to reduce my measurements accordingly. The longer you can build it, the better off it will be for you but any length of saw table is better than no table at all. My miter saw table measures 8 Feet to the left of the saw blade and another 8 feet to the right of the saw blade. This way, I can support the full length of a sheet of plywood on either side.

The saw table is constructed over 2 x 4 framing and contains multiple storage drawers below the table which I use to store small tools and supplies. If you prefer, the space underneath the saw table can be left open for shelf space or lumber storage. I suggest that the top surface be 3/4″ Melamine or Formica over 3/4″ particle board. If you can use the entire 4-foot width of the Melamine or particle board, by all means do so, especially if your miter saw is of the “sliding compound miter” type. As for overall table height, I would suggest that you build the miter saw table so that the top of the table comes to your belt line when standing. This will give you a comfortable working height and still allow you to bend over the table.

There should be a gap cut through saw table top in the area where the saw is to be mounted. This gap must be exactly as wide as the top of your miter saw and must be open to the front of the table. The gap should close behind the top of the miter saw. The saw must be mounted in this gap so that the top of the miter saw table is flush with the top of the saw table. The miter handle must be free to move its full travel in both directions, left to right.

Anticipate the need for this gap as you are framing the underside of your miter saw table because you will need to construct a shelf underneath to support the weight of the miter saw. You might want to make this shelf adjustable in micro increments so that you can get the top of the saw platform exactly flush to the top of the saw table. You can do this with lag screws with washers in sliding slots through the shelf sub-structure and into the table framing. Slightly loosen the lags and tap the table up or down with a rubber hammer before tightening the lags fully. Use a long straightedge in all directions to make sure that the miter saw and the miter saw table are flush with each other. Mount the saw securely to the shelf using lag screws.

Once the miter saw is mounted, you can begin to construct the fence or fences. A simple, inexpensive fence can be constructed using 1 x 4 or 1 x 6 clear fir boards. These boards should be hand selected for straightness and jointed on one edge. One board will be the actual fence and the other will keep it straight from behind. The fence sits with its jointed edge on the saw table top while the back-up board lies flat on the table, behind the fence, with its jointed edge joined to the bottom of the fence.

Before joining the two boards together, slotted holes should be cut into the back-up board for the purpose of mounting and adjusting the fence position on the table top with reference to the fence on the miter saw. These slots should be slightly wider than the shaft diameter of the lag screws you intend to use to mount the fence to the table. Cut a few equally spaced slots in the back-up board perpendicular (at right angle) to the fence. A 2 x 4 joist should be located under the table top, centered underneath the slots in the back-up board. This will give the lag screws something solid to bite into.

Before mounting the fence or fences to the miter saw table top, draw a pencil or chalk line where the front of the fence is to be positioned. Take a long straightedge, lay it flat on the miter saw’s metal table and push one edge of it long the miter saw’s metal fence. Keeping it in this position, draw a pencil line along the table top, out as far as possible. Repeat on the opposite side of the saw if you have tables on both sides of the saw. Extend this pencil line as far as possible.

Place the fence along the pencil line with the end of the wooden fence almost touching the end of miter saw’s metal fence. (Leave a 1/16″ gap between the wooden fence and the metal fence.) Drill appropriately sized holes for the lag screws through the table top and into the 2×4 joist underneath the table top (one for each slot). Screw the fence to the table loosely so that it can be adjusted. Use the long straight edge on the miter saw’s table and on the front of the fence to align the fence perfectly and screw down tightly. Repeat for the other side of the table if there is one.

For the left fence, place a “right to left” reading stick-on measuring tape along the top of the fence. For the right fence, place a “left to right” reading stick-on measuring tape along the top of that fence. Before sticking down, the tapes must be aligned perfectly. The left tape is measuring the distance from the left side of the saw blade teeth and the right tape is measuring the distance from the right side of the saw blade teeth. With a simple wooden fence like this, you can use wooden stop blocks clamped to the fence with C-clamps for repetitive cuts.

A slightly more expensive and far better alternative is to use a metal track or tracks with a flip-up stop and measuring tape built in. Such a device is manufactured by Kreg Tools and is available in 4-foot track lengths that can be butted together to make longer lengths. My miter saw table requires four 4-foot tracks, two for each side of the saw. The track is mounted to the top of the wooden fence you just made. You will have to adjust the height of the wooden fence (2 1/4″+ above the table top) so that the bottom of the flip-up stop clears the table by about 1/16″ in the down position.

The nice thing about the flip-up stop is that it can be flipped up out of the way without loosing its measurement setting along the measuring tape. If you were making repetitive cuts and you needed to stop to use the saw momentarily for a different kind of cut, you could resume your repetitive cutting immediately without losing any accuracy.

PORTABLE MITER SAW TABLE FOR JOBSITE USE

A jobsite miter saw table is usually made with the saw mounted to the extreme right end of the table. I have found that most miter saw manufacturers make their metal table surfaces so that they are 3 1/2″ above the table on which the saw is resting. A very straight, milled 4 x 4 (3 1/2″ x 3 1/2″) can be mounted onto the table top, almost abutting the left side of the metal table of the saw. The 4 x 4 should extend out the full length of the supporting table to the left and be mounted to the supporting table.

A fence can be attached to the back side of the 4 x 4. Use a 1 x 6 or 1 x 8 clear fir board for this purpose. As in the permanent table above, the front of the fence must align perfectly with the miter saw’s metal fence. If a wider support surface is needed, a second 4 x 4 can be mounted directly in front of the one with the fence attached to it. A Kreg Trak system with a flip-up stop can also be used on this portable miter saw table. Just make sure the wooden fence is ripped to the proper height to allow the flip-up stop to clear the table by 1/16″. (Fence is 2 1/4″ + above the top of the 4 x 4.)

As for the support table, I have used a plastic fold-up table from Costco. They come in various sizes to suit your particular need. Or, you can make your own table out of 2 x 4’s and 3/4″ plywood. Design it so that the legs can fold up for transportation and storage.

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The Cat Gut Myth and Tennis Strings

Wednesday, May 19th, 2010

Strings are often the least appreciated piece of equipment in tennis. In fact, understanding the importance of the strings you put in a racket is almost as important as the racket itself! It is possible to make an inexpensive racket play great by putting high quality strings in it. Contrarily, it is also possible to turn an expensive racket into a piece of junk by putting cheap strings in it. This article will focus on the basic characteristics of strings and what they mean for playability.

Most tennis specialty stores can recommend an appropriate string for beginners. Usually the more expensive the string, the better the quality. In the past, natural “cat” gut string (which is actually made from cow, not cat gut) gave the best combination of power, control, and spin; in fact, many professional players still use natural gut because of these qualities. However, because it is difficult to make, and string with, it is usually very expensive and outside the price range of most recreational players. It also tends to break quicker than most synthetic guts, and does not handle inclement weather as well. Fortunately, nowadays there are countless synthetic gut strings that rival most natural gut in terms of playability. Simply take a look at any tennis equipment website and notice how many options there are for strings!

This brings us to the next point – string gauge. Strings come in several different gauges, or thicknesses. The usual range is from 15 to 18, with 18 gauge being the thinnest. In general the thinner the string, the better the playability (control, spin, power, etc.); however, thinner strings tend to break quicker, which may mean that you are getting your racket re-strung more often than you’d like. On the flip side, 15 gauge string doesn’t break as quickly, but it generally has worse playability. Most beginning players do not break strings that often so I recommend stringing with a high quality 17 gauge synthetic gut string (or even natural gut if you can afford it!).

Now what? The next question is what tension to string at. Tension is a way of describing string “tightness”. A very tightly strung racket will play with lots of control, but very little power. A loosely strung racket will play with more power, but at the expense of control. You can think of string tension like a trampoline. If the trampoline is very tight you will not bounce as high as a loose trampoline. A good rule of thumb is to string your racket in the middle of the recommended range (this is usually printed somewhere on the throat of the racket). When you go to play, if the strings feel too tight string them looser, if the ball is “trampolining” off the racket then next time string it tighter.

Sometimes it takes several rounds of trial and error to figure out which type of string and what tension feels best. Experiment with different types of strings and tensions until you find a combination that works for you. Some strings are grooved and help players develop more spin; others are softer and provide more “feel”, etc. It is also recommended that you re-string your racket as many times per year as you play during the week (ie: if you play 2 times per week you would re-string your racket at least 2 times per year). If you are serious about playing good tennis string your racket much more often than this to ensure that your strings are always fresh and at the appropriate tension. This will make learning the game more enjoyable!

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Stop Missing! Use the "Half of the Half" Technique

Tuesday, May 18th, 2010

Consistency is about playing within your abilities. Many players try to hit shots that are just too good. Aiming at the lines, or trying to thread a winner past a doubles player at the net are two examples of trying to be too good. One of the easiest ways to dramatically improve your consistency, and decrease your error rate is to practice aiming for the “half-of-the-half”.

What I want you to do is imagine a tennis court. Divide the court into two halves (ie: deuce and ad sides). Now mentally draw a line down the middle of each half court. Every time you hit a tennis ball aim at this imaginary line. This is referred to as aiming at the “half-of-the-half”.

The benefits of aiming at this imaginary line is that if you “miss” there are two possible results: you’ll hit a great shot (ie: one that is closer to the line), or your shot will be neutral (ie: towards the middle of the court). Neither of which is a horrible outcome. Contrarily, if you aimed for the line, the probability of hitting the ball out is much higher. Professionals are good enough that they can shrink the court even more by dividing it into further halves. In other words, their margin for error is much lower. For beginners and intermediates the larger the margin of error the better.

This technique is also very useful if you are playing poorly. If your shots are missing by a lot, increase the size of the court by aiming at more realistic targets. Some days you may have to aim every ball right down the middle of the court, other days at the “half-of-the-half”, and other days you may be in the “zone” and you’ll be able to aim shots directly at the lines.

Practice dividing the court using imaginary lines to help you pinpoint your accuracy. The “half-of-the-half” is just one simple example to drastically improve your consistency.

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Why You Must Have a Pre-Serve Routine in Tennis

Sunday, May 16th, 2010

The serve is considered by most tennis experts to be the most important shot in the game of tennis.

After all, if you can serve well and hold your serve during a match then you cannot lose, or at the very least you will end up in a tie-break situation.

It is also the one and only shot in the game that you have total control over.

Unlike every other shot and situation that occurs during a tennis match where you are reacting to the shot of your opponent, the serve is the first shot of every point and as such gives an opportunity to the server to deliver the ball in a manner that totally suits them.

The direction, the pace, the spin etc. is totally at the mercy of and is the decision of the server and no one else.

It is for this reason alone that you should make full use of this fact and develop a delivery that can at least put you in the driving seat for the point if you don’t manage to hit an ace or unreturnable delivery.

The big thing that most players overlook is the fact that just as the physical actions that make up the serve itself need to be practised, so do the physical and mental elements that surround the preparation of the shot in order to maximise it’s effectiveness.

This means the development of a physical and mental pre-shot routine to help you reproduce the best serve you can again and again and again and again.

All of the top players use pre-serve routines before every serve. This ranges from the very simple ball bouncing of Roger Federer to the complex almost compulsive sock, hair and pants adjusting routine of Rafa Nadal.

Just as no two players have the same forehands and backhands or indeed service actions, there are also differences between all the players in regard to their physical pre-serve routines even though they all will share some fundamentals such as:

I. Taking up of a comfortable stance.

II. Ball bouncing and/or some kind of regulated motion for rhythm.

III. Visually honing in on the target area.

The same can also be said of the mental pre-serve preparation, where important elements include:

I. Positive decision making about where to hit the serve.

II. Deciding what type of serve to hit.

III. Visualisation of the balls flight to the target.

After that it is just a matter of letting go and trusting yourself. The worst mistake you can make is to try to push or guide the ball to the target.

So, try to develop a pre-serve routine for yourself that you are comfortable with that fits in with your personality, learning type and game style. This will help it to become more natural and therefore reproducible in stressful situations.

Practise it every time you serve (even when you are just practising), so that it becomes automatic and this will ensure that when you need it most, your serve will be the one thing you can count on for success.

Make it count – remember this shot is 100% down to you!

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