Armature Tester

An armature tester is a practical test. The test is used for locating opens, grounds and shorts in armatures. In order to test for short circuits, the constructer should place the armature directly on the V-block. Next, they should also turn on the current. Using a hacksaw blade or a thin piece of metal, held over the core. The armature will need to be rotated through a complete revolution. A short will be known to be present if the steel strip will become magnetized. It will also vibrate, if this is true. There is a method to find out whether the amature coils are short-circuited. This method consists of cleaning between the commutator. Most of the time, if the thin piece of metal strip will vibrate, then the armature is short-circuited. If this is the case, it will need to be replaced.

Even though there are ways to do an armature tester, they are not always effective for checking for short circuits. Other methods may need to done. Some armatures can be identified by viewing the vibration of a saw blade during the actual testing. This site will be located around the armature. Another method to test for short circuits is by using milliampere contacts. This device should be used on a AC millimeter. The armature stationary should be held in the V-block when testing. The contacts will need to be adjusted and moved around the commutator. This should be done until the viewer can get the highest reading. The armature will need to be turned in order to bring the contacts.

The viewer should be able to read the milliammeter at the exact same time. For most cases, the readings are usually the same and are rarely different. This is also true for the adjacent bars. Most of the time, if the coil is short-circuited, then the milliammerter reading will present itself as almost down to zero.

An armature tester can also be presented to consumers as a testing system. Most of the time, these sytems are automatic. They come with a pass/fail system and were created to test double flyer, odd bar and bar armatures. Resistance testing will be rolled into one automated test instrument. For this sytem, there is no need for scopes or meters. The meters are pre-programmed and are built into the system. The system was created to load the armature directly into the fixture and begins the start test. All of the decisions are made automatically. Each test can be programmed one-by-one. The total test time depends on the actual testing specifications. Usually, when a reject occurs, then the sequence will stop on its own. Viewers can monitor the type of test stop by looking at the video monitor.

Some of the armature tester objects that are performed include resistance test and surge test. The resistance test will read all of the 180 degree resistance readings at each commutator bars. All readings are eventually compared to the low and high resistance limits. When consumers are looking for this type of tester, they should concentrate on the features.