DrawBot – Design Considerations

This post isn’t really so much of an update as it is a way for me to jot down some thoughts about this DrawBot and to keep me occupied. 1 23

  1. Stepper motors mounts
    1. Right now I’m designing some rather mundane stepper motor mounts.  They’re inspired by Ed’s designs, but I’ve written the code myself.  I’ll post the code on Thingiverse once I’ve printed it.  It will output a good looking motor mount, but the design isn’t entirely parametric yet.
  2. Beaded cord, belts, and filament, oh my!
    1. If you check out this Polargraph video, you can see @ 0:22 where Sandy Noble shows a version of his Polargraph operating using two spools winding and unwinding filament.  The versions Sandy was producing for sale used a beaded cord.  The Der Kritzler uses a toothed belt.
    2. There are several downsides to using beaded cord4 or toothed belts.  First, they’re more expensive and slightly more work to obtain than simple mono filament line.  Secondly, they are both bulky.  If you’re using beaded cord or a toothed belt, they’re going to have to dangle off the side of your machine.  This means more moving and swinging parts – which is a whole other problem.
    3. One of the benefits to using a filament line is that you can easily route and redirect the line using pulleys.  This means that you could mount the motors and electronics in close proximity to each other – and then run the filament line through something like an eye bolt or a specially designed5 part.
    4. I don’t know how any of these options would affect the placement and usage of a servo for penlifts.
  3. In a box6
    1. I have this long shallow pine box, at least three feet in length, that may be perfect for this project.  I think I’ll be able to mount the motors, electronics, and just about everything I need entirely inside this box.  If I do, then all I’ll need to do later is mount the box to the wall, plug the USB cable into a computer, plus the power adapter into the wall, and start printing away!  Now, I realize that this implies a totally vertical drawing surface, but I think that is not as much of a problem as it could be.
  4. The Russians used a pencil
    1. Writing on a perfectly vertical surface with a pen can be challenging.  My thought is to create a gondola that has the weight farther back on the gondola – so that it is pushing the pen against the paper.  If the pen were angled down slightly, this might even work a little better.   But, obviously, I’ve never tried any of these variations.  I have to imagine that smarter men than me have considered and discarded these designs.  I have a crappy sketch for this, but I’m really tired and should get some sleep.

To sleep, perchance to dream.  Ay, there’s the rub.

Fear not gentle reader.  If history tells us anything, tomorrow shall bring your RSS feed another deluge of nonsense!

Posts in the DrawBot Adventure Series
  1. Wanna make a DrawBot?
  2. DrawBot Resources and Links
  3. DrawBot, the Adventure Begins
  4. DrawBots for the slow learner
  5. DrawBot - Parts Ordered!!!
  6. DrawBot - The Breakdown
  7. DrawBot - Parts Shipped!!!
  8. DrawBot - What would you draw?
  9. DrawBot - The Plan!
  10. DrawBot - The Hacks
  11. DrawBot - Giant Unicorn?
  12. DrawBot - The Delivery?
  13. DrawBot - The Delivery, Part II
  14. DrawBot – The Delivery, Part III
  15. DrawBot – The Assembly, Part I
  16. DrawBot – The Software, Part I (and an existential conversation)
  17. DrawBot – The Delivery, Part IV
  18. DrawBot – The Assembly, Part II
  19. DrawBot – The Assembly, Part III
  20. DrawBot – The Assembly, Part IV
  21. DrawBot – Design Considerations
  22. DrawBot – Halp!!! No - seriously, a little help?
  23. DrawBot – The Face Palm
  24. DrawBot – The Delivery, Part V
  25. DrawBot – The Silver Lining of Failure
  26. DrawBot – The Delivery, Part VI
  27. DrawBot – The Assembly, Part V
  28. DrawBot – The Assembly, Part VI
  29. DrawBot – Printed Parts
  30. DrawBot – The Assembly, Part VII
  31. DrawBot – The Operation, Part I
  32. DrawBot – The Assembly, Part VIII
  33. DrawBot – The Breakdown, Part II
  34. DrawBot – Printing!
  35. DrawBot – Printing, Part II
  36. DrawBot – Why are you crying?
  37. DrawBot – Calibration
  38. DrawBot – Pen Selection
  39. DrawBot – How to Recover from a Stalled Print!
  40. DrawBot – Drawing Success(ish)!!!
  41. DrawBot – Pen Selection, Part II
  42. DrawBot – Onwards and Upwards!
  43. DrawBot – Another Successful(ish) Drawing!, and an Update
  44. Restarting a Stalled DrawBot Drawing
  45. TSP FTW!
  46. Speedier DrawBot Drawings
  47. Two new DrawBot links! And an update!
  48. Excellent DrawBot Slides
  49. Another Drawing Robot!!!
  50. DrawBot Practice Tip: A Watched Pot
  51. The biggest inkjet printer ever
  52. Why do DrawBots draw on walls?
  53. Maze Code + Polargraph?
  54. All New Polargraph on the way!!!
  55. Ideas for improving my DrawBot
  56. DrawBot Aesthetic Re-Design Ideas
  57. The Eagle Has Landed
  58. Every Body Needs a Skull
  59. I think I know what I want to draw next...
  60. This project is not going to overengineer itself
  61. Overengineered Spools
  62. Overengineered Stepper Motor Mounts, Filament Guides
  63. Overengineered Bolt Endcaps, Case Holder
  64. Sourcing DrawBot Parts
  65. DrawBot - A Tour!
  66. DrawBot - A Preview
  67. Arduino Powered Drawing Robot Poll
  68. Building an Arduino Drawing Robot - On The Cheap
  69. DrawBot - Printed Parts Tour
  70. Unidentified Foam Object
  71. Arduino Powered Drawing Robot - Take 2 (Or 3)
  72. DrawBot, now ACTUALLY wall mounted!
  73. A Study of Drawing Robot Pen Holders and Design Considerations
  74. Drawing Robot Pen Holders, Calligraphy Pens, and Thought Experiments
  75. Ideal Qualities in a Drawing Robot Pen Holder
  76. Enough talk! Finally a pen holder!
  77. DrawBot Pen Holder Post Mortem
  78. To Maker Faire!!!
  79. Skipping! How could I forget the skipping?!
  80. Drawing Robot Penmanship
  81. PlotterBot at Maker Faire Bay Area 2013!
  82. PlotterBot.com - a new site dedicated to drawing robots
  1. I don’t feel like working, even though the hour grows late and I will need to get a bunch of things done one way or another. []
  2. And, really making a drawing robot is SO much more productive than what I do on a daily basis. []
  3. I wish I were kidding. []
  4. Either metal or plastic []
  5. Perhaps printed?! []
  6. With a fox! []

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