Reasons and repair for big spark of the power tools

Power tools generate sparks large site is mainly copper brush and rotor head due to friction,The main reason is so big spark exhaustion brushes and rotor head copper sheet mill

It caused serious damage.

 

1.The load big big spark, no light load small spark or spark, is caused by load changes show little relationship that the motor can continue to run.But do not let the long motor overload, easy to burn out the motor coil.

2.View the exhaustion of carbon brushes,carbon brushes exhaustion of copper rotor head hurt the most, because of the exhaustion of carbon brushes, wire brushes direct friction sheet copper head on, causing damage to the insulation sheet copper head, rotor nullify .When Brush height less than the original height of 2/ 3 points, should replace the brushes. When the change should be about all changed. Brush consistent pressure.

3.Checkrotor head copper or copper sheets if badly worn out, and view sheet copper head wear serious judgment method is the most direct: big spark, waste carbon brushes, slow speed or even smoke.

4.Also there may be a large spark foreign materials inside the machine, the friction caused by the copper head piece. If the bearing bad entry of foreign matter into the machine casing damage foreign body, foreign body into the external environment and so on.