MoCap System Related 3D Print Designs

DigitalStages

I started this discussion in order to keep a designing process in one place, so we can share modifications and different approaches together.
At the moment, I am working on a design for the current Beta-Tester KCeptor sensor.
It has reached a Beta Version, although I need to implement a light pipe for the LED still.
Here the designs (created in OpenScad)

DigitalStages

Shutdown Button Script for Raspberry Pi

https://github.com/scruss/shutdown_button

longer than 3 seconds will reset
longer than 5 seconds will shutdown
you can change the pin (default:27) in the script. I use pin 20.

You need to install python3-gpiozero first.

This will help you to assure save shutdown without using ssh.

daylanKifky

interesting, It would be nice to include a shutdown button in future versions of the Hub

DigitalStages

I finished the designs, and printed all parts for 15 sensors and a RPi Hub case.
Please use it and modify it to your liking, it is published under cc-by-sa 4.0 license.

https://gitlab.com/DigitalStages/chordata-utilities

Flavia

Hello DigitalStages , I'm Flavia, the Social Media Manager of Chordata Motion. Amazing result the one you got! I published your work on our social media channels. Feel free to share it!

NakedRabbit

Hi, DigitalStages !

I love the work you did here, especially for the hub, and I would absolutely love to use something like this. I'm not an expert in 3D printing, so please be gentle with me, but I cannot print your files without terrible overhang problems.

I have a Prusa-clone from Folgertech, and am using pretty bog-standard PLA filament. But several of the pieces have a kind of "platform" that is a few millimeters off the table, resulting in a big pile of spaghetti when I print. I've tried flipping them around, but there is always SOME angle that will result in a giant overhang with nothing underneath.

Should I be printing these with supports? I don't know how to do that, but I guess I could try. Do you have printer settings you used that might help? Do I need a better printer?

Thanks for your good work!

PrestonJ

DigitalStages Thanks so much for this information on 3D printing cases. I've found a local computer company to handle the 3D printing for me. They asked what is the scale. I've told them the size of the beta tester circuit boards I have. Does the STL file need any scaling to fit them or are they already 1 to 1 in scale with no needed adjustment? They also asked me what material to use and are assuming I will pick "pla for cost and ease of printing". What material did you use to print yours with?

daylanKifky

😍😍
They look great! I love the color-coded labels.
I'm also curious to see your complete fixing setup. How are you fixing the cases to the body?

Thanks for sharing them, but I'm getting a 404 when trying to look at the repository. Perhaps it's set as private?

DigitalStages

Hi, I am terribly sorry about this huge time delay. I was consumed by other projects, so I did not recognize the messages. Thanks for your feedback.

To the first question of @daylanKifky about fixing the cases to the body:
Yesterday, I finished the work on the stripe system I developed (Photos below). Thanks to my mum, I could make this happen.

I will create a report with sizes and parts you will need, which I am going to add to the existing gitlab project mentioned above.

@NakedRabbit , you asked me about printer settings. Please can you upload some picture to let me see the problems?
The case parts (base and lid) for kceptor sensors need to be printed both on its head. Always think "flat side is bottom". Turn the parts upside down. Use Rotate>>X>>180 in Slic3r...no fillings...only support underneath each slit on the base part.

Side note: I now have activated all notifications possible, so I hopefully get your answers soon after you post it. Again, sorry for the delay.

NakedRabbit

Thanks for the response, @DigitalStages! But yes, it's been long enough I just designed my own case. Nowhere near as nice as yours. My problem was that I do not understand printing with supports very well!

DigitalStages

@PrestonJ
I use Slic3r to generate the gcode for the prints. You do not need to scale up because of shrinking. I attached the photo below, which shows the support added to the print. You can use File>>Import Config From GCode File to get all settings. I used a Ultimaker Standard with a 0.4 Nozzle printing with PLA.

@NakedRabbit
Thanks, and sorry again. Yes, the support is often trial and error procedure. At the moment, I struggle to get an easy to remove support for my large printer using a 1mm Nozzle.
Like mentioned above, you can use the gcode of the repository to get all settings. You might need to change the printer settings itself (e.g. size of printing space) in order to adjust to your printer. But otherwise, it should work. I did not try it myself thou.
Comments, how and if it worked is much appreciated.

Cheers

PrestonJ

@DigitalStages I have someone who is going to print me the boxes. He said he is making them a bit robust with a 50% infill rather than the 20% he normally prints. Do you know what was your infill in printing yours and were you happy with the results? From what I can see of the photos, they look strong. And does a 50% infill sound ok. I don't want them to get too dense. I'm attaching them to my suit with velcro. Or does a 50% vs. 20% infill probably not make much difference in the density and weight.

DigitalStages

Hi PrestonJ. You can use Slic3r by importing all configurations via "Import config from GCode File". Then you can check on all settings I used for it. In this case I even used 10%, which makes the base of the case somewhat lighter. I think the most important part is time and material.
You actually could import the configuration onto the imported STL file, and change it accordingly to your printer and material settings.
Hope this helps