Hi-Flo Air Pump

There are many great open source syringe pump systems out there (e.g. https://github.com/pachterlab/poseidon), but most are usually focused on moving exact quantities of liquids at relatively low flowrates.

I needed a design for moving air at relatively high prescribed flowrates - up to 10 L/min - in order to test some flowrate sensors. So, I made this design!

This design is meant specifically for a pair of these large 300 mL syringes, giving a 0.6L total capacity. https://www.amazon.com/Scientific-Dispensing-Measuring-Refilling-150ml-2pack/dp/B07NZLVMCP/ref=sr_1_7?dchild=1&keywords=300+ml+syringe&qid=1584807616&sr=8-7

It's driven by a Nema 17 Stepper Motor with a GT2 pulley stage. The stage is adjustable and can accommodate a variety of pulley combinations to either increase or decrease the maximum flowrate / maximum pressure ratio.