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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/>
