无需改装硬件，用软件实现桌面数控机的分度旋转加工
A Software-Only Post-Processor for Indexed Rotary Machining on GRBL-Based CNCs
- 开发纯软件后处理器，将平面路径转为离散旋转步进
- 可在不改固件情况下实现分度旋转，支持多面工件制作
- 适合教育、创客空间等低成本场景快速原型制作
价格实惠的桌面级数控路由器广泛应用于教学、原型制作和创客空间，但多数缺少回转轴，限制了对旋转对称或多面工件的加工。现有方案通常需要硬件改造、更换控制器或使用商业CAM软件，增加成本与复杂性。本文提出一种仅基于软件的框架，实现基于GRBL的数控机的分度回转加工。通过自定义后处理器将平面刀具路径转换为离散的旋转步骤，并通过浏览器界面执行。尽管无法达到连续4轴加工效果，该方法仅需标准现成机械结构即可实现多轴加工，无需修改固件。该框架有效降低了技术与资金门槛，拓展了教室、创客空间及小型车间对多轴加工的可及性，支持实践学习与快速原型设计。
原文摘要 · Abstract (English)
Affordable desktop CNC routers are common in education, prototyping, and makerspaces, but most lack a rotary axis, limiting fabrication of rotationally symmetric or multi-sided parts. Existing solutions often require hardware retrofits, alternative controllers, or commercial CAM software, raising cost and complexity. This work presents a software-only framework for indexed rotary machining on GRBL-based CNCs. A custom post-processor converts planar toolpaths into discrete rotary steps, executed through a browser-based interface. While not equivalent to continuous 4-axis machining, the method enables practical rotary-axis fabrication using only standard, off-the-shelf mechanics, without firmware modification. By reducing technical and financial barriers, the framework expands access to multi-axis machining in classrooms, makerspaces, and small workshops, supporting hands-on learning and rapid prototyping.
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