DrawBot – Printing, Part II

After actually calibrating my machine, the results are MUCH better.  I still need to adjust the settings a little, but otherwise I’m very very happy with this result.  As you can see, the drawing is flipped.  Once flipped back, I think it is reasonably apparent this is Van Gogh’s Starry Night.  Here are a few things I’m going to try:

  • The pen I was using seemed to stop working in certain regions of the drawing.  I bought a few new pens on my lunch break today.  Both are art marker pens – one blue and one red.  Unfortunately, both are too wide to fit in my current gondola.  For now I’ll use a thin sharpie.
  • There is a slight curvature on the top and bottom of the drawing.  This is probably due to a miscalculation in the mm per rotation.  The downside to using a spool, rather than a sprocket/ball chain or gear/toothed belt, is that as the spool contains more cord, the diameter of the spool actually grows larger.  This means that when there’s a lot of line on the spool each rotation releases more line and when there’s very little line left on the spool, each rotate releases less line.  However, given the diminished space requirements, I don’t think this is going to be such a big deal.
  • I mostly measured the machine width.  Basically what that means is that I did measure it, but then got distracted, then used what I recalled the width to be inches to calculate the width in mm.  Clearly, there is room for increased precision.
  • For weights I’m using a bunch of spent batteries in a ziplock baggie tied with a wire to the gondola.  Too many batteries were causing the line to be too jagged.
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 - The Breakdown
  6. DrawBot - Parts Shipped!!!
  7. DrawBot - What would you draw?
  8. DrawBot - The Plan!
  9. DrawBot - The Hacks
  10. DrawBot - The Delivery?
  11. DrawBot - The Delivery, Part II
  12. DrawBot – The Delivery, Part III
  13. DrawBot – The Assembly, Part I
  14. DrawBot – The Software, Part I (and an existential conversation)
  15. DrawBot – The Delivery, Part IV
  16. DrawBot – The Assembly, Part II
  17. DrawBot – The Assembly, Part III
  18. DrawBot – The Assembly, Part IV
  19. DrawBot – Design Considerations
  20. DrawBot – Halp!!! No - seriously, a little help?
  21. DrawBot – The Face Palm
  22. DrawBot – The Delivery, Part V
  23. DrawBot – The Silver Lining of Failure
  24. DrawBot – The Delivery, Part VI
  25. DrawBot – The Assembly, Part V
  26. DrawBot – The Assembly, Part VI
  27. DrawBot – Printed Parts
  28. DrawBot – The Assembly, Part VII
  29. DrawBot – The Operation, Part I
  30. DrawBot – The Assembly, Part VIII
  31. DrawBot – The Breakdown, Part II
  32. DrawBot – Printing!
  33. DrawBot – Printing, Part II
  34. DrawBot – Why are you crying?
  35. DrawBot – Calibration
  36. DrawBot – Pen Selection
  37. DrawBot – Drawing Success(ish)!!!
  38. DrawBot – Pen Selection, Part II
  39. DrawBot – Onwards and Upwards!
  40. DrawBot – Another Successful(ish) Drawing!, and an Update
  41. Restarting a Stalled DrawBot Drawing
  42. TSP FTW!
  43. Speedier DrawBot Drawings
  44. Two new DrawBot links! And an update!
  45. Excellent DrawBot Slides
  46. Another Drawing Robot!!!
  47. DrawBot Practice Tip: A Watched Pot
  48. The biggest inkjet printer ever
  49. Why do DrawBots draw on walls?
  50. Maze Code + Polargraph?
  51. Ideas for improving my DrawBot
  52. DrawBot Aesthetic Re-Design Ideas
  53. The Eagle Has Landed
  54. Every Body Needs a Skull
  55. I think I know what I want to draw next...
  56. This project is not going to overengineer itself
  57. Overengineered Spools
  58. Overengineered Stepper Motor Mounts, Filament Guides
  59. Overengineered Bolt Endcaps, Case Holder
  60. Sourcing DrawBot Parts
  61. DrawBot - A Tour!
  62. DrawBot - A Preview
  63. Arduino Powered Drawing Robot Poll
  64. Building an Arduino Drawing Robot - On The Cheap
  65. DrawBot - Printed Parts Tour
  66. Unidentified Foam Object
  67. Arduino Powered Drawing Robot - Take 2 (Or 3)
  68. DrawBot, now ACTUALLY wall mounted!
  69. A Study of Drawing Robot Pen Holders and Design Considerations
  70. Drawing Robot Pen Holders, Calligraphy Pens, and Thought Experiments
  71. Ideal Qualities in a Drawing Robot Pen Holder
  72. Enough talk! Finally a pen holder!
  73. DrawBot Pen Holder Post Mortem
  74. To Maker Faire!!!
  75. Skipping! How could I forget the skipping?!
  76. Drawing Robot Penmanship
  77. PlotterBot at Maker Faire Bay Area 2013!
  78. PlotterBot.com - a new site dedicated to drawing robots

2 Responses to “DrawBot – Printing, Part II”

  1. […] Calibrating my DrawBot was apparently important to its operation.  Who knew?!  If you’re following along at home, you’ll definitely want to check out Sandy Noble’s instructible on Polargraph calibration.  I’ll put my settings here, but they probably won’t be that helpful to you unless you’re using the same exact equipment and hardware as I am. […]

  2. […] DrawBot – Printing, Part II […]

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