Laboratory Pipette

thingiverse

Redesign existing pipettes on Thingiverse for 200ul commercial tips usage. The accuracy depends on gear placement; liquids dispense consistently so far. The idea was to replace balloon membrane suction with plunger and tube due to issues retaining siphon pressure. Required items include EPDM, Nitrile o-rings (3 x 7 mm), PEZ spring/similar, lubricant, and commercial tips like Eppendorf. Print at highest settings for plunger, gears, and pipette tube, with 100% infill for the former and 15% for main body. Before assembly, test o-ring fit using water as if it were a syringe. Lubricate them for better function. Assemble by placing pipette tube in main body, adding spring to plunger, inserting gears into top cavity, threading the plunger through the gears with o-rings on its tip, and locking middle o-ring in recesses of plunger's tips. Test spring function and calibration as needed. Modifications include a stronger spring for better performance, and the potential redesign of plunger to fit round springs. This project may benefit DIY biologists or molecular gastronomists.