Device for testing needle position angles on motor and method

Abstract

The invention discloses a device for testing needle position angles on a motor and a method. The method comprises steps of sleeving a rotation shaft in a through hole of a dial; connecting a pointer and the rotation shaft; and measuring rotation angles of the rotation shaft via the cooperation of the pointer and scales. Thus, tedious steps for detecting needle position angles on a motor when the device is installed on a motor head are saved; detection efficiency is greatly improved; and the device can precisely test the difference in angles of needle positions on two motors in the same type produced by different manufactures, thereby correspondingly carrying out angle adjustment.

Description

technical field [0001] The invention belongs to the field of machinery, and relates to a measuring device, in particular to a device and a method for testing the stop position angle of a motor on an electric sewing machine. Background technique [0002] For a long time, in the process of using the electric sewing machine, the angle of the upper stop needle position of the motor is tested after it is installed on the head of the sewing machine, and the distance between the stop position mark of the handwheel rotation and a scale mark next to the handwheel is measured. Probably make an estimate. This method of measurement lacks specific data descriptions. Moreover, it is cumbersome for the motor to be installed on the machine head, and transmission parts such as screws and couplings must be installed. It is necessary to install once to test the up-stop needle position angle of a motor, and at least two times to compare the up-stop needle position angles of two motors. [00...

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Problems solved by technology

[0004] 1. It is impossible to display specific data, and it is difficult to judge the specific angle of difference only by estimation;

[0005] 2. It must be installed on the machine head, the gasket screws must be installed, and the transmission structure of the machine head must be installed. The whole inspection process is cumbersome;

[0006] 3. Due to the different motor technology of different suppliers, at the same time, the motor manufacturer cannot pass the test on the head of the sewing machine when the motor leaves the factory. Therefore, it often causes the angle of the upper stop position of different motor suppliers are also different and difficult to unify

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