Cordless Impact Wrench - Not the Same Tool as Your Cordless Drill

The cordless impact wrench is quickly gaining in popularity among professional mechanics and the hobby mechanic as well. You may be thinking "I already have a cordless drill that I use for impact applications, why do I need a cordless impact wrench as well?". I thought the same thing. The first difference is on the inside. A cordless drill creates continuous in-line torque. A cordless impact wrench employs an internal spring-loaded pulsating cam to create rotational torque. This creates the "impact" force that loosens a nut. It is the equivalent to banging a wrench with a hammer to loosen a rusty nut only a lot faster. Unlike a cordless drill - which creates continuous in-line torque, a cordless impact driver uses an internal spring-loaded pulsating cam and gear mechanism to create rotational torque or the "impact" force.

Another big difference, is the lack of reactionary torque. Reactionary torque is what you experience with your cordless drill. You have to use brute force to keep your drill from spinning the opposite direction in your hand. With a cordless impact wrench, that torque is directed to the nut not your arm. You can easily hold this tool in one hand and let the cordless impact do all the work. No more pushing down on the tool to drive that screw. These tools are also smaller and lighter than a cordless drill. For example a DeWalt cordless impact wrench is about 35% the size of its comparable cordless drill. This feature makes them perfect for those overhead projects and reaching into hard to get to spaces.

The next time your start that big deck project in the backyard, leave the cordless drill in the box and grab your cordless impact wrench. Your arm will thank you at the end of the day.

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Programming Logical Control

Introduction

This article provides a brief introduction into documenting software programs for Programmable Logic Controllers (PLC). Its aim is to provide clear guidance in the program documentation for PLC's.

This article is based on the Ladder Logic format of PLC Programming, but many of the points also related to Instruction list (IL) and Function Block Diagram (FBD).

PLC Programs should be written and documented so that they can be easily maintained and modified by others than those who originally wrote the program. All PLC Programming Editors have increased documentation capabilities including Siemens, Modicon, Allen Bradley and Mitsubishi.

Documenting PLC Software
Early Programmable Logic Controllers had little or no capacity for the documentation of programs. For technicians to understand the logic the program had to be followed from inputs to outputs. This made fault finding or modifications to programs difficult.

As PLC's have developed the programming packages have also improved, allowing for the software to be clearly annotated.

The programming tools available for most PLC's allow for the following documentation.

Rung Title
Rung Comments
Symbols and Symbol Comments.
This article provides a practical guide to using these documentation techniques.

Symbols and Symbol Comments
The purpose of symbolic addressing is to allow the PLC programmer to write the software using meaningful symbols rather than having to remember addresses.

General rules for Input and Output symbols should be to use the tags from Process and Instrumentation Diagrams (P&ID) or electrical drawing references. Where these are not available use of a simple description should be used.

For the above the following could be used.

Symbol address Description
VAC01_STPB I 0.0 Vacuum Pump Start Pushbutton
VAC01_SPPB I 0.1 Vacuum Pump Stop Pushbutton
VAC01 Q 0.0 Vacuum Pump Run
VAC01_TRAL M 1.1 Vacuum Pump Trip Alarm (Latched)
VAC01_AL M 1.1 Vacuum Pump Alarm Latch (Failed to Start/Stop)

Although many program editors can allow for more characters within the symbols it is recommended to keep the symbol short and use the comments to provide further details. Our recommendation is to build the symbols from the blocks of two characters to represent the the meaning and to keep the length less than 10.

The numbers tell a tale of programmable logic controller ( PLCs ) firm entrenchment in control applications. For instance, hardware sales figures for 2001 show $80 million spent for open control (PCbased control), with $1.1 billion being spent on programmable logic controller ( PLCs ) solutions. Even as the trend is for both figures to grow by 2004, programmable logic controllers ( PLCs ) still have a sizable advantage over PCs.

Engineers these days are calling for networking capabilities. A programmable logic controllers ( PLCs ) are now low-cost dedicated controllers. They offer more processing power and have added networking capabilities with other programmable logic controllers ( PLCs ) through serial connections. A micro programmable logic controller ( PLCs ) has an ethernet connection with optional DeviceNet or Profibus modules. So the total system is not just a stand-alone controller, but one that can network to bigger programmable logic controllers ( PLCs ). Also, increased processing speeds allow for any given programmable logic controller ( PLCs ) to do more. Because of these changes, the programmable logic controller ( PLCs ) remains a viable control option.

One trend is towards a so-called hybrid programmable logic controller ( PLCs ). These more common hybrid applications are challenging the capabilities of each control approach. Their number is growing because fewer applications are pure discrete or pure process installations. One example is a programmable logic controller ( PLCs ) on a board with sequence logic-controller functions. It plugs into a PC ISA slot and has the same programming and instruction set as a stand-alone programmable logic controller ( PLCs ). So if you already have a PC on the factory floor, you don't need to buy a programmable logic controller ( PLCs ) in a box, just the board that plugs into the PC. It has a separate power supply so that if the PC crashes, the programmable logic controller ( PLCs ) keeps running. The board also has its own I/O connectors.

Another type of programmable logic controller ( PLCs ) is an industrially hardened gateway device. It comes with a number of ports and can be loaded with a soft programmable logic controller ( PLCs ). It has ethernet, DeviceNet, and serial communications and serves as a bridge between protocols on the factory floor between legacy systems and current systems. For instance, data from serial devices such as bar code scanners can be connected to the gateway and through the soft programmable logic controller ( PLCs ) program.

After more than a decade of articles touting the benefits of PC-based control over a programmable logic controller and predictions of the PLC's demise, this much is clear: both PCs and programmable logic controllers ( PLCs ) have their place in contemporary control systems. In many cases, they will work as a team.

In lower-end process industries such as food plants where the programmable logic controller ( PLCs ) is strongly entrenched, there is little interest in switching to PC-based control. The reason is the programmable logic controller's ( PLCs ) suitability. Sequential logic control provided by a programmable logic controller ( PLCs ) is best suited for round-the-clock operations common in those industries. In particular, a programmable logic controller ( PLCs ) can offer repeatable, reliable control conducive to high-speed, repetitive processes. Dedicated performance and a high level of security are also benefits of a programmable logic controller (PLCs ). The packaging side of a food plant lends itself well to sequential logic control which makes a programmable logic controller ( PLCs ) the best choice for conveying and sorting applications.

Five years ago, the prediction was that PCs were going to take traditional programmable logic controller ( PLCs ) applications by storm. The reason they didn't is that the programmable logic controller ( PLCs ) has continued to be a good, low-cost control option. For instance, a programmable logic controller ( PLCs ) with highspeed counter inputs, loop controls, analog points, and basic math calculations are available in the $200 to $400 range with 100 or more I/O and with options for expansion. On the other hand, even buying an inexpensive PC requires loading software, setting it up, and making sure it's robust enough to not crash.

However, PC-based control has its merits. Specifically, it has greater number-crunching capability, more communication options, and is geared more toward data logging and trending, plant monitoring, report generation, and documentation. The key reasons to switch to PC-based control include networking the control system to higher-level applications such as ERP, handling complex mathematical applications such as vision inspection systems, and connecting to bar-code scanners, in-motion weigh scales, and other devices. In short, most users believe that when data must be transferred from the controller into a database for analysis, the transfer goes more smoothly when the data is already on a PC-based system.

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Dear Office Dweller

The following letter is a composite of feedback from road warriors in the field to the much respected and appreciated office dwellers who occupy the ivory towers, headquarters or maze of cubicles. The office dwellers are the curators of much needed scrolls, documents, data, financial information and other incredibly essential data and processes that enable the organization to function. The road warrior is the tireless face and voice at the front lines of the information supply chain, responsible for maintaining that delicate balance between the vision of the clients and the magic of what really happens behind the curtain.

"Did you get my electronic calendar invitation for our meeting in ten minutes?"

No, I did not get your electronic invitation for the meeting.

I am currently sitting in front of a very important client and giving my undivided attention. The Cell phone is turned to Vibrate and put away to avoid distraction. The laptop computer is turned off and in it's case. I have a pad and paper in front of me to take notes on highlights of our conversation. The client has my complete attention, especially when we are face to face. The client has specific needs and a vision of the future. I need to understand that vision and effectively communicate how our features will meet the needs of the client. When we are together, the client and I, we have one purpose that isolates us from the interruptions of the outside world. Our purpose is to find the best solution for a mutually beneficial business arrangement.

When the meeting is done, I will have to use my notes to draft a comprehensive document that I will send back to the ivory towers. This document must accurately convey the details of our conversation with the needs and vision of the client. It must accurately assess and explain the mutually beneficial business arrangement and establish the covenants or commitments of our conversation. My notes of those critical personal moments shared with the client will become the basis for a thesis that will be drafted many hours later in a hotel room in another city.

That electronic calendar invitation is buried amid two hundred and one other emails, many of which are from other clients. I will ready them all when I sit at my hotel room desk, eat my hotel cookie and drink my single serving hotel room coffee. The hotel has a Jacuzzi, pool and amenities that I will never see. What are the real amenities for a road warrior? high Speed internet connection, clean bed, hot shower and a continental breakfast are what constitute Home Sweet Home.

"Did you get the email with the attached 32MB Video of the receptionist's granddaughter's birthday party, the pictures from the company sponsored bar-Be-Cue, the invitation to have your car washed in the parking lot or the plethora of other emails with embedded cartoons and enormous attachments?"

Some places still define high speed internet connection as a 56k modem or a single wireless router available from the hotel lobby. Hopefully the download will be complete before I finish packing my suitcase in the morning. I can't wait to read the internal company announcement about the hot lunch yesterday, accompanied by the gratuitous oversized images of greasy burgers, fries and pizza slices. I am tempted to send an email with embedded pictures of my bran muffin and banana but fear that the humor will only create another burdensome download to my fellow road warriors. Besides, somebody already beat me to the punch line and responded with a "Reply to All" message to HR that included a social security number and complete medical history. There will be at least ten to fifteen more "Reply to All" messages that simply say "Thank You", but I won't know that until I open them. I have worn the letters off of my delete key.

"Did you read the email that I just sent to you?"

Thank you for the phone call. I am now driving in bumper to bumper traffic with one hand on my cell phone so I can talk to you. In my other hand is a pen, ready to scribble notes on the printed directions that I downloaded from some mapping software three days ago. I know that this call must be really important if you take the time to write the email and then call to make sure that I see it and respond. Where am I?

On the passenger side of the car is a slowly wilting drive-through lunch. A cup of car temperature coffee is perched in the console beside my elbow. I am driving with my knees and trying to avoid that other erratic driver who does not seem to be paying attention to the road or traffic. Was that my exit?

That's right, my cell phone does get messages. I wonder if I can scroll through my messages and read the pinpoint text while simultaneously talking to you about the attached files. Can you hear me? I think that I found the email that you are talking about. Yes, this is the email. Was that a police officer that I just passed? Is it legal to talk on the cell phone while driving in this city? Better not take any chances, I have to hang up for now and call you back. I may not be able to talk on the cell phone, but I don't think that there are any laws about doing email or text messaging on your phone while driving, not yet anyway.

"I just sent you an Instant Message, did you get it?"

Oh, you mean the Instant Message that you sent to ask me if I read the email that you called about while I am trying to drive? Sorry, I missed that one. Calculating route, when possible, please make a legal U-Turn. Oh, it is the agenda for the conference call that started five minutes ago. I need to provide a report and rolling forecast based on the staff meeting today? What meeting?

"Oh, we decided to change that feature three days ago. It is not available anymore."

I see, the features that I just explained to our client are no longer available. The new features will cost three times as much. The meeting that you just scheduled is for me to present how we are going to sell these expensive new features and to provide an updated forecast on the revised revenue. What, it is my turn to present? You do realize that I am hundreds of miles away right now, don't you? No, I can not email my presentation and review it with everyone by phone right now. Why? I have not started the presentation yet. I must have missed the announcement. What's that? Oh, you were not aware of the changes either and there was mp announcement. I understand completely, trust me, I really do.

So, we have a new company strategy and a new corporate direction. We have decided to reinvent ourselves. There will be a big meeting to unveil our new business plan and assigned goals. I got it. What's that? Oh, I need to submit my presentation on how I will achieve those goals and my plan must be sent before the close of business today. I'm sorry, you are breaking up. It must be a bad connection because I am close to the airport now. I do not know if you can hear me, but if you can then I want to you know that I will be boarding a plane soon and will call you again later from another city to find out what you are trying to tell me. Better yet, send an email.

"I bet you really enjoy those frequent flyer miles."

You really have no idea how much I look forward to taking my vacation, at home. After several weeks on the road and a different hotel room every night, I look forward to my own bed, the one that I picked out and paid for. These days we need to arrive at the airport at least two hours before the scheduled flight. This is not productive time. Imagine spending one quarter of your eight hour day in the office standing in line with your shoes in your hand. There is a line to check in, a line to go through security and a line at to board the plane. When you arrive, stand in line to collect your luggage and another line to get your rental car. Of course, you can bypass the line to collect your luggage if you do not travel with toothpaste, shaving cream, deodorant, any gels or liquids. You can identify those fellow passengers who have elected to expedite the cattle car processing by jettisoning their personal toiletries. It would be impolite to discuss how you can identify these passengers, just trust me on this one, you can.

Working on the computer on a tray table is only effective if you the proportionate arms of a Tyrannosaurus Rex and if the individual in front of you is incapable of reclining. More than likely, you will be staring at the liver pots in the bald patch on the top of the head in front of you for hours. Remember to bring large bills in exact change to pay for your wedge of wet cheese, two individually wrapped crackers and box of sixteen fabulous handpicked raisins. Ask for a receipt so you can expense your mid-air snack and then pay for the aisle or window seat next to you so you can claim it as entertainment expense if the snack is over your approved per diem.

If you fly as often as I do then you also get the benefit of memorizing the dialogue from abbreviated movies that you would not pay to see in the theatres. Of course, the bad language, violence and parental guidance scenes are all removed to make the movies safe for general audiences. Needless to say, we will never see Ozzy Osbourne on the eight inch monitors. Would you like to hear us recite the complete dialogue from "Coal Miner's Daughter" or "Vanity Fair"?

"You must hate your job."

On the contrary, I love it. The travel, the schedule, the hours and the inconveniences are sacrifices that must be made in the pursuit of a passion. Road warriors do not travel for the excitement of hotels, or for frequent flyer miles or because we enjoy the restaurants. The travel and time are a means to an end, and that end is something much more meaningful and personal. If you were to talk to us, really talk to us for a few hours, you would learn that the real passion is for family. For some road warriors that pursuit of accomplishment means a better life for a spouse or children at home. Every day away from home is a personal sacrifice that is an investment for the ones that are left behind. For other road warriors, the family is defined as the coworkers in the ivory towers. For these people it is the professional family and the success of the organization that keeps the fire burning within. For some other road warriors the extended family includes a special personal relationship with clients, and a true dedication to help each customer achieve their individual aspirations. For the vast majority of road warriors it is a combination of all of these things, the family at home, the family at work and the extended client family on the road.

We make sacrifices, but we are thankful to have the chance to do it and grateful to the people in the ivory tower. office dwellers are a source of constant support and amusement, for this we salute you

Sincerely,

Your Devoted Road Warrior in the Field

______________________________________________________

Words of Wisdom

"Do Not Disturb signs should be written in the language of the hotel maids." - Tim Bedore

"The path to our destination is not always a straight one. We go down the wrong road, we get lost, we turn back. Maybe it doesn't matter which road we embark on. Maybe what matters is that we embark." - Barbara Hall, Northern Exposure

"The road that we travel may be long and arduous, full of many challenges. Yet it is the same road that leads back home and that is never too far." - John Mehrmann, Executive Blueprints Inc

______________________________________________________

About the Author: John Mehrmann is a freelance writer and President of Executive Blueprints Inc., an organization devoted to improving business practices and developing human capital

John Mehrmann is an author, speaker and industry expert with Executive Blueprints Inc. http://www.ExecutiveBlueprints.com

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Managing Stress on the Golf Course to Improve Your Game

golf involves stress and at times, this stress can be detrimental to your game. It may influence your behavior in negative ways and get you into a negative thinking process, which only deters your skills. Remember that a certain amount of stress is needed to facilitate your performance but too much stress can manifest itself in negative ways. Players need to learn how to objectively assess their levels of vulnerability to stress and how to set up appropriate strategies to compensate them.

It is important to remember that the grandest quality of the true achiever is persistence. This often means fighting off discouragement and difficult times and in playing through slumps in performance.

There are several strategies that may be helpful in assisting you to maintain a standard of confidence and a winning attitude. They are balance, positive thinking, respect, vision, goal setting, commitment to continued improvement, and character.

OK, so how do you make it happen? Instead of getting mad when you play a bad shot, stay calm, remember everyone makes mistakes, if we did not, there would be no professional golf we would all be playing to the standards of Phil Mickleson, Tiger Woods et.al. Dont beat yourself up about it, even if you have a really bad round. You know you are better than that, the next time you will play better. A more difficult technique is visualization, many top sportspeople can and do visualise themselves performing well.

When goal setting, set realistic targets, beware of pointless and low targets, but be aware of your ability when setting high targets. If you dont achieve them, think why? Maybe they were not realistic. Maybe there are too many other things in your life right now. Avoid using them to generate negative thoughts, you didnt reach a target it is not the end of the world!

Yoga for golfers can help you to improve your concentration and also helps with anger control. This will help you to keep things in perspective out on the golf course. A yoga for golfers dvd would make an ideal gift for yourself, or for the golfer in your life. Having the instruction on dvd means that you can go over the techniques as many times as you want. It will pay for itself financially and out on the golf course very quickly and you can practice the exercises whenever you feel like it. It is like having a portable golf yoga guru!

So, with your improved mental attitude, you should find that you can enjoy your golf better even when having a bad round. But please remember, a little stress can add that winning edge to your game, just try to get the balance right!

Visit Think and Reach Par for a yoga for golf DVD, or maybe treat yourself or the golfer in your life to a golf birthday gift like the body golf series.

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Lose Weight and Gain Good Health with Hoodia Gordonii

All of us should take good care of our health. Do not let obesity or overweight destroy your life.

Yes, obesity can ruin your life, since it can bring other illnesses and complications that can harm your health. The worse thing is that severe obesity can lead to death.

It may sound frightening but it is true, so before it actually happens to you, you have to start finding a way or ways to fight obesity and overweight.

There are plenty of ways that can make you lose weight and to have good health. obesity is cause by too much calories that are coming in the body rather than those are being burned out from the body. So you have to find ways that can help you burn out some calories.

Eating healthy is a good way to lose weight. You have to look at the foods you eat. You have to take foods that possess the right nutrients that are needed by the body. Eating right amount of fruits and vegetable is helpful for the body. Reduce sodas and pastas. Avoid fatty foods and with too much sugar.

Physical activities and exercises are also important in losing weight. You have to have healthy lifestyle by eating healthy and exercising. It is better to spend 30 minutes of your spare time in doing walking, running, jogging, dancing, going to the gym, aerobics, biking, swimming and a lot more. It is wiser to choose those that can make you enjoy and have fun. Make sure to do it daily.

Taking medicines in losing weight can be done as well. Prescribed medicines can make you lose weight but it can bring risks in having adverse reactions that can harm you or give you discomfort which make dieters move away and look for another alternatives.

There are plenty of healthy alternatives that dieters can make use by adding it with healthy eating and exercises. One of the popular healthy alternatives is hoodia gordonii. hoodia gordonii can be found in Kalahari Desert and it is a cactus-like plant that has an active molecule that works by telling the brain think that you are already full and have eaten, so it is an effective way to make you lose weight. It even aids you to be more active since it will increase your stamina and this is also important in losing weight.

This cactus-like plant was used by San people when they go out for traveling and long hunting. They chew it in order for them to suppress their hunger and thirst. It was proven that it really works since it have been part of their lives, it really had suppressed their hunger and thirst for long period of time.

So if you want to lose weight, you have to eat healthy, do proper exercises and take hoodia gordonii. But make sure to take hoodia gordoii as specified by the label and by the manufacturer in order to get the best results.

Eliza Maledevic Ayson

http://www.primeherbal.com/hoodia

Eliza Maledevic writes for http://jump2top.com - SEO Company

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