Sunday, February 21, 2016

Design and build a spin coater

I describe how I designed and built a spincoater, and how you can use a similar motor control system in your own projects.

Firmware with I2C and Arduino library
https://www.bluerobotics.com/forums/topic/blueesc-firmware-compatible-with-afro-slim-20a-esc/

Compile instructions
http://lunarflow.com/index.php?topic=7.0

Flash tool to download firmware (and other helpful features)
http://lazyzero.de/en/modellbau/kkmulticopterflashtool

Arduino code and assembly for motor ESC
https://drive.google.com/drive/folders/0B4YXWiqYWB99UFNheWt1Nk5pX1k?resourcekey=0-Kx0efz61YNwD96beDcuIjA&usp=sharing

https://en.wikipedia.org/wiki/Spin_coating
at

11 comments:

  1. Stephen EatonFebruary 23, 2016 at 1:36 AM

    Thanks for this, very timely for me as I was just about to do a similar speed controller for a my wolfgang spindle for my PCB CNC. This has given me some great ideas.

    ReplyDelete
  2. Ian RandomFebruary 23, 2016 at 2:22 AM

    I needed something like this years ago. I was trying to make my own magnetic stirrer and used a muffin fan with a magnetic on it that was popular on the web.

    ReplyDelete
  3. Carla-LouMarch 2, 2016 at 1:47 AM

    Hello, thanks for all your works.
    I'm a french student on enginering and I actually work about liquid lens.
    I have saw your video and researchs, and I would like to exchange with you to deep my project.
    I would be very thankful and happy. I give you my email : fiorucci.carla06@gmail.com (I don't find yours)
    Thank you. Carla Fiorucci

    ReplyDelete
  4. dreggoryMay 18, 2016 at 7:44 PM

    would you mind explaining what the method is to tune the PID for say, a different motor?

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    Replies
    1. Ben KrasnowMay 19, 2016 at 7:54 PM

      There are a lot of different methods, but this is generally what I do: Set P=I=D=0, then increase P until the system oscillates when given a step change in a reasonable range. Set P to 70% of this value. Then, increase I until the system oscillates, then set to 70% of this value. Then, increase D until overshoot is reasonable or eliminated.

      Delete
  5. UnknownAugust 6, 2016 at 9:07 AM

    Hey Ben, very nice project. I will try to replicate, so would you mind to give the specs of the stuff you used... like the motor? Regards,

    ReplyDelete
  6. UnknownApril 18, 2017 at 5:08 PM

    Hi Ben, nice project. Could you please provide specs on the motor and esc used?

    Best regards,

    Troy

    ReplyDelete
  7. UnknownJuly 2, 2017 at 11:20 PM

    Hi Ben, could you please give the firmware link which you had used.. I cant find it using above link... (page can not found).

    ReplyDelete
    Replies
    1. - ElliotOctober 11, 2017 at 7:30 AM

      Try this one - looks like the topics page was renamed.

      http://discuss.bluerobotics.com/t/blueesc-firmware-compatible-with-afro-slim-20a-esc/89/2

      Delete
  8. UnknownDecember 30, 2017 at 9:54 AM

    Very nice build & presentation. Two things are not quite clear to me:
    1. Is the speed on the display real (i.e. somehow the ESC transmits the info to the Arduino over IC2?) or just based on calibration, like you used that tachometer pictured on the right at the beginning of the video and fit a line to the values the Arduino sent vs. the measured RPM's?
    2. At 16:27 you say getting a motor that goes relatively slowly is tricky. I have the same problem (and I'm trying to build a spin coater). Did you do something on the software side to fix the problem, or buy a lower kV motor?
    best regards,
    randy

    ReplyDelete
  9. UnknownAugust 8, 2019 at 10:53 PM

    Hey,I thought this might be an interesting idea. Do you think it'd be possible to replace the lamp of a projector with a uv light, and focus the image onto an object with photo resist to do your own micron level lithography

    ReplyDelete