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木工雕刻机设置工件原点是什么？
来源：http://www.jmycnc.com 时间：2021-07-23
木工雕刻机都有的一个机械原点，工件原点和机械原点是两个不同的概念。工件原点就是工件坐标的原点，是为工件尺寸编程确定的原点，一般是工件加工的起始点。工件原点可由编程者选择，它与机械原点的关系由"设置当前点工件原点"确定。
Woodworking engraving machines have a unique mechanical origin. Workpiece origin and mechanical origin are two different concepts. Workpiece origin is the origin of workpiece coordinates. It is the origin programmed for workpiece size. It is generally the starting point of workpiece processing. The origin of the workpiece can be selected by the programmer, and its relationship with the mechanical origin is determined by "setting the origin of the workpiece at the current point".
当我们确定好工件原点以后，无论木工雕刻机运行到工作台的任何一个位置只要选择操作菜单下面的"回工件原点…"选项，刀尖从当前位置以X、Y、Z的顺序自动回到工件原点。为了在回工件原点过程中，刀尖能地通过经过的空间，而不会因为碰到工件、夹具等障碍发生事故
After we determine the workpiece origin, no matter the woodworking engraving machine runs to any position of the workbench, just select the "return to workpiece origin..." option under the operation menu, and the tool tip will automatically return to the workpiece origin in the order of X, y and z from the current position. In order to ensure that the tool tip can safely pass through the passing space in the process of returning to the workpiece origin, without accidents due to obstacles such as workpiece and fixture
所以，回零路径进行如下优化：如果终点Z方向坐标大于起点Z方向坐标，则Z轴先单独进给到Z轴终点位置，然后，X，Y轴联动，到达目的点;如果终点Z方向坐标小于起点Z方向坐标，则X，Y轴先联动到达目的点X，Y坐标，然后，z轴单独进给到z轴终点坐标。
Therefore, the zero return path is optimized as follows: if the z-direction coordinate of the end point is greater than the z-direction coordinate of the start point, the z-axis is fed to the z-axis end point separately, and then the X and Y axes are linked to reach the destination point; If the Z coordinate of the end point is less than the Z coordinate of the start point, the X and Y axes reach the X and Y coordinates of the destination point first, and then the Z axis feeds to the Z axis end coordinate separately.
因为终点的Z坐标往往在工件的加工表面，为了避免刀尖回到工件零点后碰伤工件表面或刀尖，实际上，Z轴不是回到零，而在零点上方的一个偏置值。该值由"木工雕刻机系统参数窗口"的加工参数中的"退刀点"设定。一般该数值可以设置为10毫米。
Because the z-coordinate of the end point is always on the machining surface of the workpiece, in order to avoid the tool tip hitting the workpiece surface or tool tip after returning to the zero point of the workpiece, in fact, the z-axis is not back to zero, but an offset value above the zero point. This value is set by "tool withdrawal point" in the processing parameters of "woodworking engraving machine system parameter window". Generally, this value can be set to 10mm.
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