Simple Syringe Pump

thingiverse

There are numerous syringe pump designs waiting for you on Thingiverse - simply do a search! Most of these designs are incredibly capable and can be adapted for various syringe sizes, yet they frequently demand numerous vitamins such as guide rods and bearings. My objective was to design a syringe pump specifically for a 10ml syringe that requires a bare minimum of vitamins. Here is the result. The Instructions will walk you through assembling the pump and highlight other essential details. The FreeCAD design files will soon be available on GitHub. Use this in conjunction with my Simple Servo Valve (now live) to build a continuous flow system from a source to a destination. Update 3/3/18: You can now find the Simple Servo Valve on Thingiverse at https://www.thingiverse.com/thing:867862 Per your request, I'm including the FreeCAD files here. If needed, FreeCAD allows for converting these files into STEP format and possibly others. Since I don't have a direct means of testing these converted files, that process remains up to others. To assemble this project: 1. Print one of each component, except the rails - you'll need two. 2. The carriage printed with support worked seamlessly well. However, the nut hole can be quite challenging to clean out due to its small size. Nonetheless, it leaves a nearly flawless opening that's perfect for inserting an M8 nut. In addition to printing the provided parts: 1. You will also need an M8 nut (for securing the carriage). 2. A 120mm long piece of M8 threaded rod. 3. Four 10mm x M3 screws to secure the motor. 4. Eight 20mm x M3 screws to secure the frame. 5. Four 12mm x M3 screws for attaching the clamps. 6. One 10ml syringe is essential, naturally. 7. A NEMA 17 stepper motor will be your drive. 8. To join the stepper with the carriage, a shaft coupling of some type is needed - I detail this here: https://hackaday.io/project/3794/logs For using an M3 tap: * Threading requires you to bore holes into the rails, carriage, and clamps in the syringe holder. Follow along through the images as they clearly demonstrate the steps for assembling the device. As I'm powering my pump using a Teensy 2 (Arduino clone), a 5V source, a stepper driver, and an external power supply (to keep everything stable), feel free to explore further if this sparks your interest!