Matthias Popp and I are considering attaching a pressure sensor to a syringe with position feedback and using the syringe at various plunger speeds (i.e., pressure vs. position curves at several different velocities) (idea courtesy of Simon Stier and looks like Hamilton does something similar). For context:
opened 04:03AM - 08 Jan 25 UTC
https://hasanyone.com/?id=f2572055
Talking with @MatPopp,
Using Science Ju… bilee and performing optical microscopy and viscosity measurements.
Possibly machining a hole into the Science Jubilee plate to make room to attach the OpenFlexure delta stage microscope (reflection version) underneath for imaging the slurry from the bottom of a wellplate, where the wellplate is moved around via a press fitted 3D printed attachment into one of the wells near the center of the well plate (maybe with some adhesive for robustness).
Using a pressure sensor connected to a syringe at various plunger speeds as a proxy measure for viscosity.
## Microscope
We also considered a custom attachment to a glass slide to enable pickup and having the microscope near one of the corners of the Science Jubilee (i.e., without machining a hole into the build plate), but drop casting into a wellplate and moving it around may be simpler to implement.
Attaching the delta stage as a science jubilee tool might be a bit unwieldy in terms of size, but it's not overly heavy. It would probably leave room for one or two other tools (possibly an ultrasonicator and/or a doctor blade).
Rather than machining a hole into the Science Jubilee build plate, creating a standoff plate to raise the vials and the well plate (or perhaps just making a base for the wellplate and vial stand that's really tall), and putting the microscope and anything else required directly on the build plate is another option. There just needs to be enough XY clearance relative to the cross bar and the tool.
Stacking wellplates and moving them with the fake tip procedure mentioned above is an option.
## Viscosity
https://hasanyone.com/?id=1b242604
##
There was mention on the discord forum about possible difficulty with calibration with too much weight on the build plate. Maybe not a big deal if we don't need high XY precision. Not sure how much center of gravity will affect things either. For sure need to be careful to keep the weight towards the end with the two rods instead of the two corners nearest the sides with the the single rod, since too much pressure on those corners can tip the build plate.
Many of the suggestions and comments in https://chatgpt.com/share/677df81f-13a8-8006-8817-51b40cad70ce seem reasonable to me. Use of a glass slide where the slurry has been spread may prove more informative than the well plates, similarly coating the slurry onto aluminum foil and using the microscope as a science jubilee tool would allow for inspection in the as-coated state.
Always consider that the build plate moves in the Z-direction (not the toolhead), so for example, having the microscope down low to the desk wouldn't work (it would have to either already be very high up, and have lateral clearance so the build plate doesn't hit it and it doesn't interfere with the cross-bar, or move with the build plate itself).
Heated/vacuum drying may be difficult to implement. An ultrasonic probe would be especially helpful with the water-based slurries it would seem.
Making the feet of Science Jubilee much taller would reduce the chances of having a tall item that's fixtured underneath the build plate crash into the desk. Raising Science Jubilee up too tall could also pose problems though.
- Let's add equipment monitoring #11
- Let's add temperature/humidity/pressure measurement #13
- We'll need a scale nearby with RS232 control, probably the full autotrickler #113, maybe x3 (carbon black, binder, active material), in which case we'd need to order 2 more, and possibly separate A&D scales (0.1 mg resolution)
- Four point probe measurements would be nice [[transcript](https://chatgpt.com/share/677ed249-6808-8006-8c8a-33e204634475)], but probably out of scope for the current tests
- Glass slides (or something similarly rigid) with aluminum foil already attached to it might be a nice way to have the slurry coated without worrying as much about refreshing Al foil
Some related literature:
Velasco, P. Q.; Low, K. Y. A.; Leong, C. J.; Ng, W. T.; Qiu, S.; Jhunjhunwala, S.; Li, B.; Qian, A.; Hippalgaonkar, K.; Cheng, J. J. W. Optimization of Liquid Handling Parameters for Viscous Liquid Transfers with Pipetting Robots, a “Sticky Situation.” Digital Discovery 2024 , 3 (5), 1011–1020. Optimization of liquid handling parameters for viscous liquid transfers with pipetting robots, a “sticky situation” - Digital Discovery (RSC Publishing) .
Soh, B. W.; Chitre, A.; Lee, W. Y.; Bash, D.; Kumar, J. N.; Hippalgaonkar, K. Automated Pipetting Robot for Proxy High-Throughput Viscometry of Newtonian Fluids. Digital Discovery 2023 , 2 (2), 481–488. Automated pipetting robot for proxy high-throughput viscometry of Newtonian fluids - Digital Discovery (RSC Publishing) .
Chen, J.; Mo, Y. Wireless Electrochemical Reactor for Accelerated Exploratory Study of Electroorganic Synthesis. ACS Cent. Sci. 2023 , 9 (9), 1820–1826. https://doi.org/10.1021/acscentsci.3c00856 .
Cherkasov, N.; Baldwin, S.; Gibbons, G. J.; Isakov, D. Monitoring Chemistry In Situ with a Smart Stirrer: A Magnetic Stirrer Bar with an Integrated Process Monitoring System. ACS Sens. 2020 , 5 (8), 2497–2502. https://doi.org/10.1021/acssensors.0c00720 .
Derrick, J. M.; Golub, M.; Shrivastav, V. R.; Zhang, J. A Low-Cost Affordable Viscometer Design for Experimental Fluid Viscosity Verification and Drag Coefficient Calculation; 2018.
Rabani, A.; Challis, R. A Low-Cost Viscometer Based on a Permanent Magnet Dc Motor. Meas. Sci. Technol. 2013 , 24 (3), 035304. Radware Bot Manager Captcha .
cc @FrantzLD @jeff.watchorn @OwenMelville @nipun.0092 @ @RogviZiskason @loppe35 @krisgambhir
1 Like
