DIY electric motor collector restoration
Posted: Mon Feb 17, 2025 4:52 am
The best way to adjust carbon brushes is to use a homemade lapping device. The lapping device is a shaft with sandpaper attached to it. The easiest way is to make the shaft from wood with a diameter equal to the diameter of the commutator, turning the workpiece on a lathe. A metal rod is inserted tightly along the axis inside the shaft. The device is attached to the chuck of an electric drill, the drill is turned on, and the brushes are brought to the rotating sandpaper wheel.
The adjustment should be done carefully, periodically applying the brushes to the rotor collector to check their clearance.
After grinding the brushes to the commutator, it is recommended to check the correct fastening of the brush holders before installation. The brush holders are set to neutral during factory installation, which hong kong telegram data minimizes sparking on the commutator. If there are no factory marks, then the adjustment of the brush holder installation is performed by moving the brush holder in the direction opposite to the rotor rotation until the formation of a minimum spark.
The brushes should not dangle in the brush holder, but should be pressed tightly against the collector lamellas.
The pressing force is regulated by springs in the brush holder.
Sparking of a faulty collector
Increased sparking on the rotor collector may occur due to a short circuit of the anchor, breakage of the anchor coils, short circuit of the windings on the anchor body. All these faults are eliminated only during a major overhaul of the rotor.
Most household appliances (vacuum cleaners, washing machines, meat grinders, hair dryers, tools, etc.) use a collector electric motor. Like any unit, it can fail. Repair of collector electric motors can be done at home, without the help of specialists. To do this, it is enough to know what they are and have at least a minimum of experience.
The adjustment should be done carefully, periodically applying the brushes to the rotor collector to check their clearance.
After grinding the brushes to the commutator, it is recommended to check the correct fastening of the brush holders before installation. The brush holders are set to neutral during factory installation, which hong kong telegram data minimizes sparking on the commutator. If there are no factory marks, then the adjustment of the brush holder installation is performed by moving the brush holder in the direction opposite to the rotor rotation until the formation of a minimum spark.
The brushes should not dangle in the brush holder, but should be pressed tightly against the collector lamellas.
The pressing force is regulated by springs in the brush holder.
Sparking of a faulty collector
Increased sparking on the rotor collector may occur due to a short circuit of the anchor, breakage of the anchor coils, short circuit of the windings on the anchor body. All these faults are eliminated only during a major overhaul of the rotor.
Most household appliances (vacuum cleaners, washing machines, meat grinders, hair dryers, tools, etc.) use a collector electric motor. Like any unit, it can fail. Repair of collector electric motors can be done at home, without the help of specialists. To do this, it is enough to know what they are and have at least a minimum of experience.