Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

DIYbio Orbital Shaker V 1.0

by ProgressTH Nov 8, 2017
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anyone else has a problem with the Shaker_MotionLinks.stl?

I made the 3D model in SketchUp and exported it from there. I use an older version of Cura for my Thai 3D printer (ExtraBot). Not sure if any of this info helps.

I repaired the STL with Materialise Magics and Tinkercad - everything's okay :)

Have you considered submitting this to the NIH 3D Print Exchange (https://3dprint.nih.gov/) as well ? It would be a good fit there, as the folks who run the exchange have published on efforts to utilize 3D printing in the lab: https://www.ncbi.nlm.nih.gov/pubmed/27197798. There's even a specific category dedicated to 3D printable custom labware and instruments: https://3dprint.nih.gov/discover?terms=&field_model_category_tag_tid%5B%5D=93&field_model_license_nid=All&sort_by=created&sort_order=DESC&items_per_page=24

I never heard of this before. I will definitely check it out and thanks for sharing. Your build looks really great.

Great project. Is this a NEMA14 motor being used? Do you have a part # for the motor, or any other specifications?

It is this exact stepper: https://www.gravitechthai.com/product_detail.php?d=209

It is a 12v stepper. On the label is reads: Mercury Motor, SM-42BYG011-25 1.8° 45/2016

I used this driver: https://www.gravitechthai.com/product_detail.php?d=864

Hope that helps, let me know if you have any other questions.

Thanks for this info. I have parts in hand now and am planning to start assembly. Any chance a wiring diagram is available? What are you using for the motor power supply?

Edit: It also appears that the top plate is missing from the list of STL files available for download?
Edit2: I was able to extract the missing top plate STL file from the Sketchup file, all set on that front for now.

I just uploaded the wiring diagram above. I would highly recommend researching Arduino-Stepper diagrams and Arduino-Stepper-Potentiometer diagrams online and double-checking everything because I'm not an electrical engineer. Trace the wires very carefully.

The image attached here is the basic stepper setup I always use for all stepper projects first before moving on to more additions.

The power supply is a 12 volt 1 amp wall adapter.

One other quick electronics update: I was able to get everything wired up and working initially using this schematic from Pololu: https://a.pololu-files.com/picture/0J4232.600.png?f2f6269e0a80c41f0a5147915106aa55. After seeing your schematic which lets the Micro Pro use the same 12V as the motor, I rewired and tested again. I think there may be a small error in the wiring diagram that was uploaded, as it has the SLEEP pin of the 8825 connected to GND. In this configuration, I was not able to get the motor working. When I put SLEEP back to VCC from the microcontroller with pin 1 of the potentiometer and the RESET line, everything works as expected.

Looking forward to getting everything assembled and tested now that the electronics are ready to go!

thank you for the feedback, I really appreciate it. I will check the diagram a second time and make sure. I managed to burn out an Arduino the first time around because of poor wiring and would like to save others that headache.

Thank you very much for the quick reply! I wasn't aware the Pro Micro could be powered via the same 12V power source using the RAW pin and was planning to add a 5V regulator to power it. This simplifies things! For anyone else curious, the Pro Micro hookup guide has this information as well that I missed: https://learn.sparkfun.com/tutorials/pro-micro--fio-v3-hookup-guide

Amazing! next project for me. Thanks!