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
  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 Assembly, Part III
  14. DrawBot – Design Considerations
  15. DrawBot – The Face Palm
  16. A nifty little WordPress plugin...
  17. Simple Series WordPress Plugin
  18. This is a test of the Simple Series post system... This is only a test
  19. Now Simple Series will also add the series list to RSS feeds too!
  20. ZOMG! Simple Series is going viral!
  21. DrawBot – The Assembly, Part VI
  22. DrawBot – The Operation, Part I
  23. DrawBot – The Assembly, Part VIII
  24. DrawBot – Printing!
  25. DrawBot – Printing, Part II
  26. DrawBot – Why are you crying?
  27. DrawBot – Calibration
  28. DrawBot – Pen Selection
  29. DrawBot – Drawing Success(ish)!!!
  30. DrawBot – Onwards and Upwards!
  31. WordPress plugin - OCD Plugin Stats
  32. Restarting a Stalled DrawBot Drawing
  33. Two new DrawBot links! And an update!
  34. DrawBot Practice Tip: A Watched Pot
  35. Ideas for improving my DrawBot
  36. DrawBot Aesthetic Re-Design Ideas
  37. Every Body Needs a Skull
  38. I think I know what I want to draw next...
  39. This project is not going to overengineer itself
  40. Overengineered Spools
  41. Overengineered Bolt Endcaps, Case Holder
  42. Simple Series WordPress Plugin Update
  43. OCD Plugin Stats and the WordPress.org Statistics API
  44. How to add a custom button to the WordPress Visual TinyMCE Editor
  45. A Study of Drawing Robot Pen Holders and Design Considerations
  46. Drawing Robot Pen Holders, Calligraphy Pens, and Thought Experiments
  47. To Maker Faire!!!

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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