# 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)

<div><figure><img src="/files/8NM5MCJY7DCGf2WO7zFj" alt=""><figcaption><p>Syringe + needle assembly used to test liquid handling</p></figcaption></figure> <figure><img src="/files/3MekxPpzjZgWuptlnfVH" alt=""><figcaption><p>Pump Assembly 3d print</p></figcaption></figure> <figure><img src="/files/CgElvP27kDyJFoomdjvN" alt=""><figcaption><p>the syringe + tubing(the tubing should be slightly larger than the syringe nozzle, but this is not the case)</p></figcaption></figure></div>

* 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


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