Adjustable Volume Straw Pipette

thingiverse

This pipette boasts adjustable volume, making it a valuable addition to any wet lab. It accommodates various settings while still being accurate enough for low-precision tasks. To operate, use two thumb nuts for controlling upper and lower stops. Assemble the device with components like an elastic balloon membrane (from a kids' balloon), a spring (Pez dispenser), tape, and a drinking straw. Print all necessary parts: the upper body, lower body, plunger, and two thumb gears. For optimal performance, use the provided spring, but it may work without it due to the balloon's elasticity. Follow the attached photos for assembly instructions, and remember that this design is tailored for a specific straw diameter; further options can be provided upon request. The printing settings are 0.1mm layer height with 15% fill for non-plunger parts and 100% fill for the plunger. Check out this video demo: http://youtu.be/N2Ax4OGokGM