The M-GON40-L Lower Metric Goniometric Stage rotates an object about an axis, which is unobstructed by the stage itself, located over the center of the top platform. GON Series Goniometric Rotation Stages use an actuator-driven precision dovetail slide and are spring-loaded to reduce the backlash commonly found in similar worm-gear driven stages. The spring-loaded design has the additional advantage of interchangeable actuators which allow selection of adjustment sensitivities from a variety of actuators such as precision adjustment screws, differential micrometers, or motorized actuators. Like-sized GON Series stages can be used alone or stacked. In a stacked configuration, the axes of rotation will intersect with each other for orthogonal motion about a common point in space. The M-GON40-L Goniometric Stages has ±5° of rotational motion when used with a 13 mm travel actuator. The motion on goniometric stages can be securely locked using a hex screw on the side of the stage.

M-GON40-L较低的度规测角阶段旋转的一个轴，这是不受阻碍的阶段本身，位于顶部平台的中心。多边形系列测角旋转级采用执行机构驱动的精密燕尾滑块，采用弹簧加载，以减少蜗轮驱动级常见的齿隙。弹簧加载的设计具有可互换执行机构的额外优点，可从各种执行机构(如精密调整螺钉、差动千分尺或电动执行机构)中选择调整灵敏度。类似尺寸的多边形系列台阶可以单独使用，也可以堆叠使用。在堆叠结构中，旋转轴会相交于空间中一个公共点的正交运动。的M-GON40-L测向阶段±5°的旋转运动时使用13毫米旅行致动器。在测角阶段的运动可以安全地锁定使用六角螺丝在舞台侧面。