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The main factors causing spindle imbalance in CNC machine tools are the types of imbalance

1. & Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp; The main factors causing machine tool spindle imbalance

L & Nbsp& Nbsp; The spindle design has asymmetry< Br/>
L & Nbsp& Nbsp; Uneven distribution of spindle material< Br/>
L & Nbsp& Nbsp; There are errors in the process of spindle machining and assembly< Br/>
L & Nbsp& Nbsp; Unbalanced tool structure or wear< Br/>


2.  Types of spindle unbalance

1)   Static imbalance
The imbalance of the spindle is only in a state where it deviates from the axis direction at the center of gravity G< Br/>


Using a vector Us that passes through the center of gravity G of the spindle; Represent< Br/>
2)   Couple imbalance

It is the line connecting the imbalance of the spindle and the axis at the center of gravity G  In an intersecting state, the imbalance of the axis of rotation forms a couple of forces around the center of gravity< Br/>


The imbalance of the couple is represented by a pair of vectors Um of the same size but opposite direction< Br/>
3)   Dynamic imbalance
It is a state where the axis is neither parallel nor intersecting with the line connecting the unbalance of the spindle< Br/>


Can be equivalent to a static unbalance quantity Us that is not in the same plane; And an unbalanced amount Um with a force couple< Br/>
4)   Quasi static imbalance

It is a special case of dynamic unbalance, where the line connecting the main axis unbalance and the axis is at the center of gravity G  An unbalanced state where a point intersects outside. It can be equivalent to a static unbalance and a couple unbalance in the same plane< Br/>