Pulsed laser-based micro-texturing induces topographical and chemical modifications on surfaces that yield beneficial properties such as anti-microbial effect, micro-hydrodynamic bearing, and surface hardening. These properties find a multitude of applications in surface treatment and tribology. However, laser texturing of free form surfaces is a cost and effort-intensive process, specifically medical implants or ergonomically designed tools/devices. Such components often require numerically controlled 3 or 5 axes machines and sophisticated computer-aided manufacturing (CAM) software for precise tool movement. In this manuscript, the authors have designed, fabricated, and validated a jerk-free, cost-effective Stewart platform that works in tandem with an existing laser machining setup. A microcontroller and stepper motor based linear actuators were used to orient and translate the six degrees-of-freedom (DoF) platform. A customized computer program helped maneuver the workpieces (medical implants) for the micro texturing of the 3D surface profiles. As laser irradiation demands a time-invariant focal length for effective ablation, the platform maintains the focal length from the galvo-scanner of the laser machine to the workpiece while maneuvering the workpiece throughout the texture trajectory. To estimate the smoothness of the platform during motion, vibrational parameters were also measured and analyzed. Such cost-effective platforms may find applications in free form texturing in non-contact mode of machining as well as in metrology. Texturing was performed successfully on implants freeform surface with an average diameter of ~35–40 μm and depth of ~15–20 μm.

基于脉冲激光的微纹理在表面上诱导形貌和化学改性，从而产生有益的特性，例如抗微生物作用、微流体动力轴承和表面硬化。这些特性在表面处理和摩擦学中有多种应用。然而，自由曲面的激光纹理化是一个成本高、工作量大的过程，特别是医疗植入物或符合人体工程学设计的工具/设备。此类部件通常需要数控 3 轴或 5 轴机器和复杂的计算机辅助制造 (CAM) 软件，以实现精确的刀具移动。在这份手稿中，作者设计、制造和验证了一个无冲击、具有成本效益的 Stewart 平台，该平台与现有的激光加工装置协同工作。基于微控制器和步进电机的线性致动器用于定位和平移六自由度 (DoF) 平台。定制的计算机程序帮助操纵工件（医疗植入物）以对 3D 表面轮廓进行微纹理化。由于激光照射需要时不变的焦距才能进行有效的烧蚀，因此该平台在整个纹理轨迹中操纵工件的同时，保持了从激光机的振镜扫描仪到工件的焦距。为了估计运动过程中平台的平滑度，还测量和分析了振动参数。这种具有成本效益的平台可以在非接触式加工模式和计量学中的自由形式纹理中找到应用。