Micro Peristaltic Pump

thingiverse

Micro Peristaltic Pump\nThis is a ~1.5" peristaltic pump designed for use with 1/8" tubing. Standard aquarium tubing can be used, but Tygon tubing is the preferred choice.\nIncluded are two versions: a 2.25" version for use with 1/4" tubing and .4mm nozzles, and another suitable for .4mm nozzles.\nPrint Settings\nPrinter: \nPowerspec 3D Ultra\nRafts: No\nSupports: No\nResolution: .2mm nozzle, .1mm layer for version A, .4mm nozzle, .2mm layer for version B\nInfill: 25%\n\nPost-Printing\nRequired Materials\nTo build this pump you will need\n1/8" PVC Tubing for version A and 1/4" PVC tubing for version B. You can purchase Tygon tubing at Amazon.\nSolarbotics GM23 Geared Pager Motor, available at Solarbotics.com\n3x 1/2" 2-56 screws, obtainable at McMaster.com\nAssembly Instructions\nStep 1 - 3D Printing\nPrint the 1/8" or 1/4" design based on the tubing you will be using. We used a Powerspec 3D Ultra printer with the following settings:\nVersion A: PLA material, 200C nozzle temperature, 60C hotbed temperature, .2mm nozzle diameter, .1mm layer height, 25% infill, and 90mm/s print speed.\nVersion B: PLA material, 200C nozzle temperature, 60C hotbed temperature, .4mm nozzle diameter, .2mm layer height, 25% infill, and 90mm/s print speed.\nStep 2 - Break in the Gearing\nTo break in the gearing, insert a 7.75mm hex bit into a power drill and run it for several minutes to wear down the tight design created by 3D printing.\nStep 3 - Insert the Tygon Tubing\nMove the gears by hand until one of the holes is exposed. Pull a good length of tubing through that hole, then slowly turn the gears while feeding the tubing down along the track. Once you reach the other side, push the end of the tubing through the hole and pull out the excess length.\nStep 4 - Install the Solarbotics Gear Motor 23\nInsert the GM23 into the pump housing, secure it with a cover using 3x 1/2" 2-56 screws. Attach the motor drive gear to the shaft of the motor, which should fit snugly and require some force.\nStep 5 - Attach Pump Drive Gear\nApply epoxy or super glue to one end of the drive shaft and press it into the large pump gear. Do the same for the center gear in the pump housing. Ensure the large pump gear is aligned with the motor drive gear, then let the adhesive dry.\nStep 6 - Admire your 3D printed peristaltic pump!\nCongratulations! Your pump is now complete and ready to use. Attach some wires to the motor and a 100uF ceramic capacitor between the leads, then hook it up to your motor driver and you're ready to go.\nHow I Designed This\nI based my design on Emmetts geared bearing, which can be found at Thingiverse.com. I used Rhinoceros 3D and the GearGen script available for it. The process took place over four separate iterations of the design, and I plan to update this section in the future with more details.