Friday, January 20, 2012

Sta-Kon Connectors and Terminals - Easier to install and potential Assured

!±8± Sta-Kon Connectors and Terminals - Easier to install and potential Assured

Sta-Kon connectors and terminals are largely used in separate electronic devices to help them work in excellent order. But finding the right business where you can get the right sized Sta-Kon connectors, Sta-Kon terminals and other electronics plugs &accessories is foremost for the plane functioning of your project.

For great carrying out of electrical systems, it is foremost to get the best quality connectors and terminals. Sta-Kon terminals and connectors are man-made using the quality material to provide you maximum output. They are easy to setup and come in discrete designs along with a funneled final barrel entry for quick wire insertion that minimizes coast loss. This feature allows wire insertion quicker and easier. Chamfering removes wire coast "hang up" and departure upon insertion into the terminal's barrel. You know the loss of even a combine of wire strands can have bad results on electrical efficiency and resistance to mechanical strain.

For plane functioning of device, Sta-Kon components also feature a robust, long-barrel develop with brazed or overlapped seams that withstand crimping without separating (a frequent issue with butted seams on competitor products). This makes sure that your connections don´t experience problems with electrical flow.

Apart from great design, Sta-Kon terminals and connectors are properly plated and insulated to ensure maximum safety. All the parts are put straight through a right process which cleans and smoothes the final of any manufacturing by-products, in general grease, oils and sharp edges. So, when you pick Sta-Kon terminals and connectors you don't have to worry about the quality and finishing of the components.

Besides that, the permissible premise of terminals and connectors is very indispensable to the sufficient carrying out of an electrical system. The accurately installed connector will allow good conductivity straight through the termination. A poor termination results in a high resistance connection and a poor connector premise may cause damage or failure of an entire system.

To make a good termination, there are some points which you should remember. So, before the connector or final is installed on the conductor, remember these things. First, strip the insulation cautiously so as to avert nicking or cutting conductor strands. Strip the insulation to the thorough distance so that the conductors can be fitted fully into the connector barrel; the wire/cable should be visible in the inspection hole of the lug.

If you are finding for specific types of Sta-Kon connectors or Sta-Kon terminals, internet is the ultimate place. There are discrete websites ready that offer broad range of Sta-Kon products that will meet all your specific needs. Today on internet, not only buying electronic hardware parts that you need is suitable and hassle-free, it can also save your money. If you have special requirement or want to place convention order, you can get data with details and pricing by calling the company, or sending an email. In addition, you can also check some thorough Sta-Kon products which are ready to ship immediately.


Sta-Kon Connectors and Terminals - Easier to install and potential Assured

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Monday, January 9, 2012

Electrical Troubleshooting for Stairmaster

!±8± Electrical Troubleshooting for Stairmaster

Stairmaster 4600, 4400, & 4000PT stairclimbers, among the most popular exercise machines sold on the market today, have three electrical components that are responsible for most troubleshooting calls. The Alternator, Diode, and the resistor are the heart and soul of the Stairmaster 4600/4400PT stairclimber and often cause resistance levels to drop creating performance problems.

Tools Needed:

7/16", 3/8", & 1/4" nut drivers. 4" piece of wire with alligator clips attached to each end, and a multi-meter,

Symptom:

The Stairmaster loses all resistance when you step onto the pedals.

Alternator Test:

First, remove the machine from its power source. Then remove the side panels so you have a clear view of the alternator. On the back of the alternator, remove the black wire from the terminal B+ (marked POS). Remove the brown wire from the field terminal. You will need a length of wire 4" long with alligator clips attached to each end of the wire. Attach the wire to the B+ (POS) terminal and the field terminal, step on the machine for 10-15 seconds; if full resistance is present, the alternator has correct current flow. If no resistance is present, the next item to check is the alternator brushes. The brown square plate with two machine screws is the cover to the brushes. Remove the two machine screws with a ¼" nut driver and remove the alternator brushes. There should be ¼" or more of brush, any less and the alternator brushes should be replaced first. If the proper amount of brush is available, replace the alternator.

Diode Test:

Remove the brown wire and diode from the field terminal of the alternator and set the multi-meter to the Ohms setting. Place one lead on each end of the diode, and then reverse the leads. A good diode will indicate a high reading in one direction and a lower reading in the opposite direction. Replace the diode if both readings are high or if both readings are low.

Resistor Test:

Remove one wire from the load resistor and place one lead from the multi-meter, one each threaded post on the resistor. If the multi-meter does not read 0.5 Ohms, replace the resistor. As with any maintenance procedures always consult your owners' manual or seek the advice of a qualified repair technician.


Electrical Troubleshooting for Stairmaster

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Wednesday, January 4, 2012

Aviation Electrical Wire

!±8± Aviation Electrical Wire

Aircraft service imposes severe environmental conditions on electric wire. To assure satisfactory service, inspect the wire at regular intervals for abrasions, defective insulation, condition of terminal posts, and buildup of corrosion under or around swaged terminals. When replacing copper wire with aluminium wire, increase the gauge of the wire two sizes.

Voltage Drop in Electrical Wire.

The voltage drop in the main power wires from the generation source or the battery to the bus should not exceed 2 percent of the regulated voltage, when the generator is carrying rated current or the battery is being discharged at the 5-minute rate.

Resistance.

The resistance of the current return path through the aircraft structure is always considered negligible. However, this is based on the assumption that adequate bonding of the structure or a special electric current return path has been provided which is capable of carrying the required electric current with a negligible voltage drop. A resistance measurement of.005 ohms from ground point of the generator or battery to ground terminal of any electrical device may be considered satisfactory. Another satisfactory method of determining circuit resistance is to check the voltage drop across the circuit. If the voltage drop does not exceed the limit established by the aircraft or product manufacturer, the resistance value for the circuit may be considered satisfactory. When using the voltage drop method of checking a circuit, maintain the input voltage at a constant value.
It should be noted that the No. 14 wire should not be used if any portion of its 100-foot length is to be confined in conduit, large bundles, or locations of high ambient temperature.

Aircraft electrical wire or aircraft quality wire.

Correct wire selection is dependent upon knowledge of current requirements, operating temperatures, and environmental conditions involved in the particular installation. Copper conductors are coated to prevent oxidation and to facilitate soldering. Tinned copper wire or aluminium wire is generally used in installations where operating temperatures do not exceed 221* F. (105* C.). Silvercoated copper wire is used where temperatures do not exceed 392* F. (200* Nickel-coated copper wire is used for temperatures up to 500* F. (260* C.). Nickel-coated wire is more difficult to solder than tinned or silver-coated wire, but with proper techniques, satisfactory connections can be made.

Electrical cable Insulation.

Polyvinylchloride (PVC) is a common insulation, used as PVC cable sleeving competing with Vidaflex cable sleeving and PTFE sleeving. It has good insulating properties and is self-extinguishing after the flame source is removed. Normal operating temperatures are limited to 221* F. (105* C.). Silicone rubber is rated at 392* F. (200* C.), is highly flexible, and self-extinguishing except in vertical runs. PTFE sleeving Fluorocarbon (polytetra-fluoroethylene) is widely used as high-temperature insulation. It will not burn, but will vaporize when exposed to flame. It is resistant to most fluids. FEP cable Fluorocarbon (fluorinated ethylene propolene) is rated at 392° F. (200° C.) but will melt at higher temperatures. Other properties of FEP are similar to TFE.

Thermal and Abrasion Resistant Materials.

Glass braid has good thermal and abrasion qualities but moisture absorption is high. Asbestos and other minerals provide high temperature and flame resistance, but are highly absorbent. Moisture absorption is reduced by use of silicone rubber, TFE, or other saturants. Nylon is widely used in low-temperature wires for abrasion and fluid resistance. Polyimide, a new material, has excellent thermal and abrasion resistant characteristics.

Electrical wire selection.

Select wire for structural and environmental characteristics. Wire normally used for chassis wiring, in enclosed areas, or in compact wire harnesses protected by moulded or braided coverings usually has low abrasion resistance. Wire used to interconnect units, or in long, open runs as airframe wire, is designed to withstand normal aircraft environment without sleeving, jacketing, or other protection. Care must be taken in making all installations because no wire insulation or jacketing will withstand continuous scuffing or abrasion.

In order to select the correct size of electric wire for equipment, two major requirements must be met:

(1) The size must be sufficient to prevent an excessive voltage drop while carrying the required current over the required distance.

(2) The size must be sufficient to prevent overheating of the wire while carrying the required current.

For the selection of wire we must know:

(1) the length in feet of the actual wire "run" from the bus to the equipment;

(2) the number of amperes of current it must carry;

(3) the amount of voltage drop permitted; and

(4) whether the current carried will be intermittent (maximum 2 minutes) or continuous, and if continuous, whether it is a single wire in free air, in a conduit, or in a bundle.

Assume that we wish to install a 50-foot length of wire from the bus to the equipment in a 28-volt system. We are permitted a 1-volt drop for continuous operation.


Aviation Electrical Wire

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