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Question:

What is the change of the hand drill with positive and negative turns?

What is the change of the hand drill with positive and negative turns?

Answer:

Did you ask 12V, DC or 220V? The direct current is with the switch tube, just at the back of the motor. I opened it. He's attached to an aluminum piece
It is very convenient to control the attachment of the master winding to control the steering, especially when the self tapping thread is tight or loose, and it is very easy to use.
The electric torch is a kind of serial excitation winding motor, and its positive and reverse is through the double knife and double throw steering switch, changing the position of two carbon brushes. Equivalent to changing the phase sequence so that the motor is reversing.

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