This paper introduces the design and manufacturing of a filling machine specifically for granular materials. This machine is engineered to deliver fixed quantities of materials into containers, utilizing a mechanical mechanism that eliminates the need for calibration sensors. The operation employs a quantitatively controlled delivery system through an upright cylindrical vessel, topped with an aperture for material loading. The procedural sequence of the machine is divided into two main stages: the loading stage and the filling stage. During the loading stage, the cylinder aligns with a source tank, allowing material to enter through the top conduit. Following this, the machine transitions to the filling stage, As the machine moves to the filling stage, the linear motion mechanism adjusts the position of the cylinder, closing the upper inlet and revealing the lower outlet at the same time. This port, which remains closed during the loading phase to prevent leakage, is opened to allow the material to effectively unload into an external container, and begin the filling process. The machine’s capability to fill containers up to 500 ml. The discharge of materials is controlled by a single-ended pneumatic piston, ensuring accurate and consistent delivery into containers. The entire process is automated through an Arduino microcontroller, which coordinates two infrared (IR) sensors and a belt drive system, enabling efficient and reliable operations. Furthermore, the machine's design is tailored for accessibility and adaptability, with all components manufacturable via 3D printing within a 200x200 mm build area. The open-source nature of the design and software invites enhancements and adaptations from the broader community, fostering a collaborative environment for ongoing development and innovation in automated filling systems. This systematic and uniform operation of the machine is essential for applications requiring high precision in material filling.

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