# Week 9 Update What was Accomplished: * Experimented the capabilities of the newly arrived syringe(by directly inserting liquids into it) * The syringe was able to pump out acetone, photoresist, IPA, and DI consistently * The syringe was not leaking regardless of liquid * However, these liquids can only be consistently pumped WHEN the syringe is directly attached to tubing, and not to a needle(since the liquid flowing through the exit of the needle actually flows onto the surface of the syringe)

Syringe + needle assembly used to test liquid handling

the syringe + tubing(the tubing should be slightly larger than the syringe nozzle, but this is not the case)

* Took measurements of the syringe(since we, and re-designed CAD models accordingly) * The measurement of the syringe hub was different than advertised(around 4mm), in comparison to our 3mm inner diameter syringes * To mitigate this issue, while testing the syringe, a luer lock needle was directly attached onto the syringe, instead of PTFE tubing * 3D printed spin coater container for the lab automation assembly * 3D printed revised CAD components for pump assembly Roadblocks: * Measurements provided by the syringe(as advertised) were inaccurate * Not ALL of the glass syringes are leak proof, so we have to be very careful selecting the right syringe Plans for next week: * Wait for the actual linear actuator motor to arrive to finalize assembly, and compile the code * Order parts for 3-4 additional syringe pumps * 3d print the rest of the spin coater