The Main Reason Of Failure Hammer(a)
Post Time: 2016-07-13
The main reason of failure hammer
Hammer fault is divided into open circuit, short circuit, grounding, rotor commutation spark big ring
The most likely cause of breaking off the power line, in which the line handle point of the most common, followed by the base of the plug. Such disconnection has a feature that is in use when hammer occurs when breaking through the phenomenon of power line measured with a multimeter resistance profile, as long as the root of moving power lines, multimeter reading will change.
Switch bad situation a lot, switch with a multimeter to check the well.
Brush poor contact may also cause disconnection, open carbon brush cover, to observe the end face of the carbon brush, if good contact is smooth, pitting is bad.
Electrical disconnection detection, open the carbon brush cover, and lead were measured with a multimeter the resistance of the brush holder, if infinite it may be broken or the stator and the stator carbon seat lead blown. Multimeter table pen put commutator on the rotor, the rotor is rotated slowly, a large reading changes hands, so that the rotor may be a short circuit or open circuit.
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