Arc welding machines and stick welders have been around for many, many years. According to wikipedia.com the first recorded use of an arc welding machine was way back in the early 1800's.

Slowly over time the development of the stick welder and arc welding machine were greatly improved. The evolution of mankind demanded better ways of joining metal together.

Anyone who has even remotly looked into welding has most likely heard of, or seen an arc welding machine.

To understand the stick welder you need to understand that you are dealing with electricity. All electricity that is supplied to your workshop, shed, garage or house is what is called AC power.

AC power is short for "alternating current". In english this means that the power coming out of your wall socket will go from positive (+), to negative (-) really fast over a short amount of time.


In my country of Australia we are on 240volt AC power at 50Hz. So this means that my power will go up to 240V positive, then back down to negative 240V at 50Hz. Hz is Hertz, which means that the power will go from +240V to -240V at 50times per second. Pretty quick huh!

On a side note this is why the light bulbs in you house do not flicker, as the change from positive to negative is so fast. But if the Hz was only say 5 instead of 50 you would probably see the light globe flicker on, off, on, off.

The majority are DC output.

DC is direct current. That is the power does not go up and down like a wave but rather in just a straight line.

This gives us a consistent current power source of DC power which is ideal for arc welding.
Here is a video that I did about Arc Welding Machines and their basic setup.

It is much easier for me to show you in a video rather than you having to read through page after page of welding information.

In the video I show two different types of arc welding machines. The first machine is the type of welder that you would buy from the local hardware store for a hundred or so dollars.

The second machine is a more heavy duty industrial machine that is physically bigger and will offer more power output for bigger welds, and it has a higher duty cycle. The second machine has a high voltage output option as well.

In the video I go over how to attatch the welding leads, how to adjust the welding power output, and how to put the electrode into the "stinger".

click here to watch the video

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Truck bed covers are often referred to Tonneau covers. "Tonneau" is a French for "cover" and since the 1970s has been used to describe the cover that goes over the pickup truck's bed. This cover is used to protect the contents of the bed from wind and rain, and to secure it away from thieves. But the benefits not only stop there. They can improve the look of your truck and improve the drag on your vehicle, saving you gas.

When the truck bed is uncovered it pulls the air downwards which is poor aerodynamics and means when you are traveling at high speed there will a lot of drag on your truck. The noise associated with this drag can be very loud. By covering your bed, a truck bed cover can reduce the drag and associated noise meaning that your truck will consume less gas when you are on a long trip consisting of high speeds like on a highway or freeway.

Truck bed covers come in three different types.

Hard truck bed covers are made from fiberglass, hard plastic or aluminum. These types of covers are typically smooth and are colored the same as the truck itself. Most are hinged so that you just need to lift up one end to get access to whatever is in the tray. These are the most expensive types of covers.

Soft truck covers are made from toughened fabric like material and have bows to keep their shape under snow and water. They attach to the truck tray with snaps, Velcro or a groove and tongue system. Some can be rolled up or others are hinged lid models.

Retractable bed covers are a popular choice. When you need access to the tray they roll up inside a canister that sits at the back of truck.

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SET UP

Use care when handling cylinders. A hoist or other equipment must be used for heavier items.

1. Place cylinder on test stand.

2. Install correct fittings into ports.

3. Attach hoses to ports.

4. Set relief valve to operating pressure of cylinder.


STANDARD TEST

Make sure that the relief valve is set for the appropriate level. Fill cylinder with oil by alternately introducing oil into the extend and retract ports. Inspect all parts of the cylinder for leaks or damage.

5. Fully extend rod.

6. Check extend length to print.

7. Wipe rod.

8. Inspect rod for scratches or other damage.

9. Fully retract.

10. Check retracted length to print.

11. Pressurize retract/rod end port to relief pressure and hold.

12. Check for leaks around rod seal, head seal, port welds.

PISTON BYPASS INSPECTION

This test is to determine whether oil is leaking past the piston seals. Such a leak would allow the cylinder to drift while in operation.

13. Check for bypass over piston.

1. Disconnect hose from extend/base port (while retract/rod port is still pressurized).
2. Check for oil flow from extend/base port (should be none).
3. Reconnect hose to extend/base port.

14. Fully extend and pressurize extend/base port to relief pressure and hold.

15. Check for leaks around base and port welds.

16. Check for bypass over piston.

1. Disconnect hose from retract/rod end port.
2. Check for oil flow from retract/rod end port (should be none).
3. Reconnect hose to retract/rod end port.

COMPLETE TEST

Clean up and send to paint booth.

17. Fully retract with air pressure only.

18. Remove hoses and fittings.

19. Turn cylinder over to drain excess oil.

20. Plug ports.

21. Stamp with inspector number when complete and satisfactory.

22. Complete test report.

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