2012年10月17日星期三

Overcoming A Stalled Sewing Machine Motor

Most of us, live our lives with certain expectations. We expect the light wow gold to turn on when we turn the switch. We expect our cars to go when we press down on the accelerator. So, when we press down on the foot control of our sewing machines we expect the sewing machine to work.

At times, we get to thinking of your sewing machine like a friend or in buy wow weapons a sense like a real person. We talk to it. We touch it. We listen to it. Sometimes, it may appear that our friend is stricken with an infection or disease. This is especially true when we press down on the power and very little happens.

To diagnose the problem, check to make sure everything is properly set up for sewing. The power plug is plugged into a working outlet. Your foot control is plugged in. The power switch is on. Now test the machine again. If when you depress the power pedal, little or nothing happens you may have the problem.

There may be several different problems, but the most common are a motor issue or a binding buy wow weapons issue. To repair sewing machines with this difficulty determine which is the major culprit, turn the hand wheel toward you several times. Feel for any resistance, drag, or binding. Listen for any strange sounds. If the machine moves freely without significant drag or noise, the problem is most likely in the motor.

Sewing machines today have two kinds of motors. The traditional AC motor and the more modern DC Pulse motor operate differently, but can both be wow gold causes of difficulty. More commonly, however, we deal with problem AC motors. If a DC Pulse motor fails, it usually just stops working altogether and needs to be replaced. Very simply, AC motors are composed of an armature, coil windings, and motor brushes. While sewing at slower speeds, carbon deposits develop inside the motor. Wear can eventually ruin the motor brushes. As a result, the motors can gradually lose power and even stop working.

You do not need to be an expert on motors, to understand how deposits of debris can make it more and more difficult for the motor to perform as expected. Over time, the motor loses its ability to work properly and may even fail to turn at all.

A quick and easy solution to this problem is what is known as a motor burn. Since the carbon has developed over a long time of slower sewing, it is sometimes possible to burn off the carbon by running the motor at top speed for several minutes. The carbon heats up and melts away.

Begin by setting the hand wheel to turn without turning the wow gold sewing machine. Then apply full pressure to the foot control. If needed help the motor turn by turning the hand wheel toward you. The motor may gradually get faster, but keep it running several minutes.

Caution: avoid excessive wow items heat or potential sparking. Do not leave the motor unattended.

Sometimes the motor will get really hot, and should be shut down and allowed to cool. Sometimes a motor may begin to smoke. This may be the collected oils inside the motor burning off. Watch it closely and shut down if the smoke does not dissipate quickly. Keep an eye on the machine for sparking. General rule, a little is tolerable, but too much is a fire. Use common sense when attempting to perform a motor burn. Do not run the motor at full force for more than ten minutes at a time.

In some cases, the motor burn does not work. The damage to the motor is too extensive. In such cases, you may remove the motor brushes and replace them. You may disassemble the motor housing and clean away the gunk from the contact points and armature. If you do so, beware. Using solvents in electrical appliances can be extremely dangerous. Before applying electricity to any motor make certain it is 100% dry and free of anything that might ignite, smolder, or otherwise cause harm.
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