VIBRATION ANALYSIS

Vibration analysis aids in diagnosing such problems as unbalance, misalignment, bent shaft, bearing defects. In most industrial applications, annoying and damaging vibration must be isolated and eliminated. Major problems can be prevented and minor problems can be diagnosed and treated. Problems can be anticipated and prevented by identifying warning signs. Vibration databases work best if there is regularly scheduled vibration monitoring in order to establish trends and identify trouble spots. In a considerable number of cases, vibration can be reduced by on-site balancing. Virtually all rotating pieces of equipment that have access to the rotating element can be dynamically field balanced. As an integral part of any proactive maintenance program, vibration analysis accurately identifies potentially catastrophic failures and then facilitates the prevention of these failures before they occur. Machines that fail in service can cost, on average, ten times more to repair than if the repair was anticipated and properly scheduled outside of production hours.

DYNAMIC BALANCING

Balancing machines measure the size and angle of vibration. When rotating parts or materials rotate they generate centrifugal forces. Normally the sum of these forces = 0. If they do not, that rotating object will generate noise and vibration. In a working environment, a balanced piece of rotating equipment will rotate around its center line, which is center of gravity. If some form of excess weight (dirt, dust or other substances) is introduced to the unit’s surface, centrifugal forces will cause the center of gravity to shift. The rotating object is being forced to rotate on its center line by the bearings but the centrifugal force is trying to make the component rotate around its center of gravity. This results in unbalance which you see and hear as vibration. It must be determined if the unbalance is within acceptable tolerance or if modifications are needed. Using the latest technology and years of experience, we can determine whether correction is required and what the appropriate method of correction is. Dynamic Balancing reduces maintenance costs and bearing failures.

WINDING ANALYSIS

Electric motors fail, sooner or later, and nearly half of all industrial motor failures result from internal electrical shorts caused by degraded insulation. In order to maximize a motor’s lifespan, the condition of its winding and insulation must be tested regularly. The Baker DX Electric Motor Analyzer provides the industry’s most comprehensive set of tests to analyze a motor’s entire insulation system. It can identify incorrect number of turns, wire gauges or wire material. It also detects open, reversed or unbalanced coils. It can find early indications of insulation weakness and faults in windings, between phases, coil to coil and in groundwall insulation. It can determine if contamination is impacting insulation strength and it can detect problems with motor connections.

CORE LOSS TESTING

Core loss is a significant cause of wasted electrical energy that could result from overheating during operation or during winding burnout or from physical damage. Core loss is second only to copper loss in motor windings in causing motor inefficiency. Core loss testing is the only method of determining if a motor is capable of operating at its rated efficiency after rebuilding. Core loss testing is one of the most important quality assurance tools in the motor repair industry and is virtually a requirement when rewinding a motor. It predicts motor reliability, helps maintain motor efficiency and avoids rework by a damaged core. It identifies motors with damaged cores that should be replaced versus being repaired, reveals repairable problems, verifies the effectiveness of repairs and assists in documenting the repair or quality control process.

HIGHEST QUALITY MATERIALS

We use only the highest quality materials in our motor rewinds/rebuilds. XL-2103 Solventless Polyester Resin is part of a new class of high flash point, very low VOC, solventless polyester resins. It is especially recommended for dip and bake or VPI applications. Ultrashield Plus magnet wire is specifically designed for use in motors that may be subjected to higher voltage spikes present in inverter duty applications. Ultrashield Plus magnet wire has improved voltage endurance and thermal properties, compared to standard NEMA magnet wire, while retaining superior chemical resistance to common solvents and refrigerants.

EASA

The AC Motor Verification and Redesign software provides easy verification of either concentric or lap windings, as well as redesigns with changes in poles/speed, horsepower, frequency or voltage. The software is fully integrated with EASA’s Motor Rewind Database which is ever-expanding online database of more than 250,000 windings. This guarantees that technicians will have access to the most up to date information at all times.

EASA (Electrical Apparatus Service Association) is an international trade organization of more than 1,800 electromechanical sales and service firms in nearly 80 countries. Being a member of EASA provides access to state of the art resources including equipment, materials, technology and training. Doing business with an EASA member assures that your equipment will be repaired to exacting standards using the very latest equipment and techniques.

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