Inline Peristaltic Pump for Nema 17 Stepper by ractorIII

Last crawled date: 3 years, 4 months ago

tested and operational - to see in action, follow @earlyamericanrobotpottery on instagram.
This is an inline peristaltic pump designed to be controlled with a NEMA 17 stepper for the conveying and deposition of liquid slurries. All printable components printed solid in ABS on a Taz 6 3d printer - some components have to be machined. I was able to cut the shafts and pins in my own shop but outsourced the end bushings to be machined in brass (.stl files included but plastic will not be satisfactory).
The pump uses a series of bearings on eccentric spacers to sequentially compress silicone tubing. I use commonly available silicone catheter tubing (1/8" ID 1/4" OD) - making it appropriate for conveying a wide array of materials, including food.
This model is designed with a cleated bottom mount and 2 mounting holes spaced 20mm apart for mounting inline with 40mm aluminum extrusion.
Additional Requirements:
M3 screws and Hex Nuts, a variety of lengths
M3 thermal inserts
2 mm rod - used to key the eccentric spacers to each other and to the end bushings
0.25" stainless shaft
2 x Brass end bushings* - I had mine machined but they could be printed in brass through shapeways (.stl file is included but printing in plastic will not be strong enough)
M3 tap and set screws for the brass end bushings
2 x end bushing bearings (16mm x 28mm x 7mm)
8 x actuator bearings (12mm x 21mm x 5mm)
6.35mm to 5mm flexible coupler
The lower cleat mount and nema17 motor mount are provided here as courtesy