pMulti micropipette

Download the zip files containing the 3D models:

• Micropipette model files.
• Tip ejector models.
• Parking post models.
  • Alternative tool-wings for 8 mm rods are available.

The total amount of each part that should be made is listed in the below and in the BOM.

Here is the complete Bill of materials (, ) for this guide.

Tools and Materials

Tools:

• 3D Printer (x1)
• CNC Lathe (x1)
• Drill (x1)
• 6 mm drill bit (x1)
• M5 Tap (x1)
• Silicone Grease (x1)

Materials:

• 20 mm diameter Delrin stock (x1)
• PLA Filament 1.75mm (x1)

Parts

Parts for OLA's pOne micropipette.

Tool-plate

• M5 x 8 mm Button Head Screw (x3)
• M3 x 16mm Screw (x4)
• M3 Hex Nut (x4)
• pMulti tool-plate N (x1) (source/TOOLPLATE-WEDGE-PIP-N.stl)
• THSL wedge-plate N (x1) (source/THSL-WEDGE-PLATE-BEVEL-M3-COMP.stl)
• M3 x 8mm Conical Head Screw (x3)
• M3 Hex Nut (x3)
• Tool parking wings:
• Parking wing base (x1) (source/TP-PIP-BASE-V2.1.stl)
• Parking wing (x1) (source/TP-JUB-WING-BASE.V3.stl)
• Parking wing (mirrored) (x1) (source/TP-JUB-WING-BASE.V3-MIRROR.stl)
• Parking wing o-ring base (x4) (source/TP-JUB-WING-ORING.V3.stl)
• 6x2 Nitrile O-ring (x4)
• M3 Hex Nut (x6)
• M3 x 16mm Screw (x4)
• M3 x 20mm Screw (x2)

Actuator

Motor:

• NEMA 17 Short Body Stepper Motor (x1)
• NEMA 17 Cable 1000mm (x1)
• pMulti motor base (x1) (source/GIL-MOT-BAS.stl)
• THSL Leadscrew D8xL2 75mm (x1)
• NEMA 17 5-8 Shaft Coupler (x1)
• M3 x 10mm Screw (x4)
• M3 Hex Standoff 10mm (x4)

Linear guide:

• 8x136mm Steel Rod (x2)
• pMulti bottom base (x1) (source/PIP-BASE-LOWER.stl)
• M3 x 10mm Screw (x4)
• M3 Hex Nut (x4)

Endstop:

• MakerBot Endstop (x1)
• MakerBot Endstop Cable 1000mm (x1)
• M3 x 10mm Screw (x2)
• M3 Hex Nut (x2)
• MakerBot endstop rod base (x2) (source/ENDSTOP-BASE-MAKERBOT.stl)

Carriage:

• pMulti actuator carriage (x1) (source/PIP-SUP-CR.stl)
• LM8UU Linear Bearing (x2)
• THSL Anti-Backlash Nut D8xL2 (x1)
• Compression spring 50 mm (x2)
• M3 x 12mm Screw (x2)

Cable management

On the tool side:

• Cable base (8-wire) (x1) (source/PIP-CABLE-BASE-8W.stl)
  • Alternatively, for 4-wire cables, print PIP-CABLE-BASE-4W.stl.
• Zip Ties (x2)
• Cable base rod fixture (x1) (source/PIP-CABLE-BASE-ROD-FIXTURE.stl)
• M3 x 16mm Screw (x2)
• M3 Hex Nut (x2)

To guide the cables to the backpanel:

• Reinforced Bowden Tube 1 meter (x1)
• One of the cable bases, as counted in the backpanel BOM.

Pipette

Tip-holder:

• Multi-fit Tip-holder (x1) (source/PZ0101-COMBINED-V02.step)
• 6x2 Nitrile O-ring (x1)
• pMulti tip-holder stop (x1) (source/PIP-CPL-SHEATH.stl)
• pMulti spring bottom shim (x2) (source/SPRING-WASHER-v2.stl)
• M3 x 25mm Screw (x4)
• M3 Hex Nut (x4)

Tip-holder and spring seats:

• Wide spring version:
  • Compression Spring 17 mm (wide) (x1)
  • pMulti spring top seat (wide) (x1) (source/PIP-SUP-LW.stl)
• Narrow spring version:
  • Compression Spring 17 mm (narrow) (x1)
  • pMulti spring top seat (narrow) (x1) (source/PIP-SUP-LW-ALT.stl)
  • Spring centering shim (x1) (source/PIP-ALT-SPRING-SHIM.stl)

Plunger:

• M4 x 10mm Set screw (x2)
• Dowel pin shaft and magnets version:
  • 50mm Dowel OD6 pin (x1)
  • D6xL2 cylindrical magnet (x4)
  • pMulti shaft holder (magnets) (x1) (source/PIP-SUP-STEM.stl)
• Machined shaft and screw version:
  • pMulti plunger (machined) (x1) (reference model)
  • M4 x 16mm Conical Head Screw (x1) (16 mm thread length, 20 mm total length).
  • pMulti shaft holder (screw) (x1) (source/PIP-SUP-STEM-ALT.stl)

Parking

Tool parking post

• Tool post base (x1) (source/TOOL-POST-5-8mm.stl)
• 5x65mm Steel Rod Beveled (x2)
• M4 Hex Nut (x2)
• M4 x 25mm Screw (x2)
• M4 Washer (x2)

Ejector post:

• 2020 V-Slot Aluminum 380mm (x1), M5 tapped on one end.
• M5 x 20mm Screw (x1)
• 2020 Angle Corner Connector (x2)
• M4 Drop-In Nut 2020 (x2)
• M4 x 10mm Screw (x2)
• M4 Washer (x2)
• Tip ejector fork (x1) (source/PIP-TIP-EJECTOR.V1B.stl)
• M5 x 20mm Screw (x1)
• M5 Washer (x2)
• M5 Hex Nut (x1)