Position controlling method, position controlling device and electric tool containing the device

Abstract

A position control method, position control device and electric tool with this position control device, the position control device has the general-purpose motor (13), actuating unit (20), which connected with the general-purpose motor (13) to fulfill the position switching, a pulse generator (10), for generating the variable pulse signals; processing (11) unit, for continuous collecting and processing the pulse signals and generating the relevant pulse width modulation signals; circuit (12) for connecting the processing unit and general-purpose motor, which output the pulse width modulation signal to the general-purpose motor (13), which receive and fulfill the pulse width modulation signal to drive the actuating unit (20) and fulfill the position switching, this position control device may realize the precision open-loop control of position switching in real-time.

Description

technical field [0001] The present invention relates to a position control method, a control device and an electric tool including the device, in particular, the present invention relates to an open-loop control method, a control device and an open-loop control method that uses a common motor to realize stepping and continuous transformation of the position, and a control device including the device. of electric tools. Background technique [0002] In many occasions, the position change of moving parts will require a relatively fast movement and a relatively slow movement to meet the movement requirements. This type of movement includes the conversion control and adjustment of angle and displacement, etc., such as the power tool miter saw turntable Rotation, arm swing, etc. Specifically, if a workpiece needs to be cut along a 30-degree bevel, it is necessary to swing the swing arm to form a 30-degree angle with the turntable. The usual method is to first swing it from 0 deg...

AI Technical Summary

Problems solved by technology

This kind of manual operation of the swing arm is not only inconvenient to operate, time-consuming and labor-intensive, but also the low precision will lead to inaccurate position control and reduction of machining accuracy.

[0003] In order to improve the control accuracy, servo motors are also used, such as Chinese Patent No. 1253866, but the manufacturing cost of using servo motors to achieve precise position control is quite high, which is not conducive to popularization and application in non-numerical control fields.

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