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. DrawBot - Parts Ordered!!!
  5. DrawBot - The Breakdown
  6. DrawBot - Parts Shipped!!!
  7. DrawBot - What would you draw?
  8. DrawBot - The Plan!
  9. DrawBot - The Hacks
  10. DrawBot - Giant Unicorn?
  11. DrawBot - The Delivery?
  12. DrawBot - The Delivery, Part II
  13. DrawBot – The Delivery, Part III
  14. DrawBot – The Delivery, Part IV
  15. DrawBot – The Assembly, Part III
  16. DrawBot – Halp!!! No - seriously, a little help?
  17. DrawBot – The Face Palm
  18. i find i want to add more posts in some random series, just so i can use my new plugin
  19. Simple Series WordPress Plugin
  20. My first published WordPress plugin! Simple Series!
  21. This is a test of the Simple Series post system... This is only a test
  22. Now Simple Series will also add the series list to RSS feeds too!
  23. ZOMG! Simple Series is going viral!
  24. DrawBot – The Operation, Part I
  25. DrawBot – The Assembly, Part VIII
  26. DrawBot – The Breakdown, Part II
  27. DrawBot – Printing!
  28. DrawBot – Printing, Part II
  29. DrawBot – Why are you crying?
  30. DrawBot – Calibration
  31. DrawBot – Pen Selection
  32. Restarting a Stalled DrawBot Drawing
  33. Speedier DrawBot Drawings
  34. Two new DrawBot links! And an update!
  35. Maze Code + Polargraph?
  36. The Eagle Has Landed
  37. Every Body Needs a Skull
  38. I think I know what I want to draw next...
  39. Overengineered Spools
  40. Overengineered Stepper Motor Mounts, Filament Guides
  41. Ideal Qualities in a Drawing Robot Pen Holder
  42. Skipping! How could I forget the skipping?!
  43. Drawing Robot Penmanship

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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