The well balanced armature would achieve a better motor quality, especially for reducing the noise, so choosing a suitable balancing machine is important.
There are automatical dynamatic balancing machine with adding weight and remove weight type.
For the home appliance motor with a common speed, it is economic and suitable to choose a adding weight type balancer. For the motor with much high speed over 20,000RPM, you may consider a removing weight type balancer for long time use.
There are removing weight type balancing machine with R cutter (for power tool motor balancing),V cutter(for automobile motor such as fuel pump motor, window lifting motor, wiper motor, and drill hole type (alternator,generator motor, shield pump) for different kinds of motors.
Some customer choose R cutter remove weight balancing, and some customer like V cutter,
The R cutter could achieve more armature rotor output, while V cutter is preferred by some respected customer such as Bosch.
For balance the armature, some customer use the adding weight type, while some use the removing weight type? How they choose and decide, If your motor speed is high, such as the power tool motor, you need to use the removing weight type, If your motor is with not high speed, you could use the adding weight type
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