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Sketchy Machines

@verytiredrobot.bsky.social
43 followers 44 following 20 posts

Plotter art and other machine drawing and painting enthusiast.

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Sketchy Machines @verytiredrobot.bsky.social · 19/04/2026
Thanks @schwittlick.net for this #ptpx postcard! I love the fine detail in the hatching perpendicular to the central axis of the lines.
A postcard, drawn by a penplotter of bands in deep blue ink on white paper.  The bands have a central line, and the hatchings are roughly perpendicular to that central line, but curve and zigzag on a smaller scale.  Where the lines intersect, one may cross the other, obscuring it, or the central lines may join in a 4 way join.
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Sketchy Machines @verytiredrobot.bsky.social · 15/07/2025
Maps look surprisingly good in silver! h/t to @doersino.mastodon.social.ap.brid.gy for his osm2svg tool ghpages.noahdoersing.com/osm2svg4art/ and thanks to DirtAlleyDesign for organizing the plot party (on Instagram). #plotterart,#penplotter #mapart
A pen plotted street map in silver ink on black paper with a river bend visible in the negative space in the center.
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Sketchy Machines @verytiredrobot.bsky.social · 17/06/2025
It's been months since I plotted anything, but this Monday's prompt (Flowers) from DirtAlleyDesign (on Instagram) and a particularly beautiful crop of peonies blooming in the garden nudged me to try a new photo to plotter workflow.  #plotter #plotterart
A black and white sketch of a flower in a small bottle done by a plotter in a very sketchy style.  The flower is large and irregular.  The stem has a leaft.  The bottle says Belle Brillet and, strangely, poivre.
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Sketchy Machines @verytiredrobot.bsky.social · 15/04/2025
Hey checkout this great #ptpx postcard from @polygonsoup on Instagram.  Love these colors, and the sgraffito technique!  #plotterart #penplotter
A plotter postcard of multicolored lines on a black background.  There are holes along the  top edge like for a ring binder.  The multicolored lines are made by scratching through a black coating.
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Reposted by Sketchy Machines
Paul Butler @paulbutler.org · 04/04/2025
Always nice getting surprise #ptpx mail! Bottom left is @verytiredrobot.bsky.social’s exploration of latent space of a facial autoencoder. Top and right, Daniel Catt’s work using a stamp with a plotter, and a nice photo booklet of the process!
Two post cards, one in the left has two faces plotted in a pointillist style, and the one on the right has variations of the word “FUCK” stamped in different colors. A booklet on top shows a picture of the stamping process.
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Sketchy Machines @verytiredrobot.bsky.social · 28/03/2025
Woohoo! #ptpx postcards hit the post office earlier this week. And besides that, I did a little write up about it. tinyurl.com/FaceAntiface #plotterart #penplotter
A set of plotted postcards in black and blue, each consisting of two faces rendered in halftone with a barcode between them
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Sketchy Machines @verytiredrobot.bsky.social · 22/03/2025
#ptpx is stretching out into a year long event! 😂 Friday I received this piece from Romain (data.flaw on Instagram). Love that sharp contrast of the white on black! Look closely to pick up on the alternating line structure (you see it more in the thumbnail). #plotterart #penplotter
A plotter art postcard in white ink on black paper.  There is an inner rectangle of white dots on the black background of the paper.  The dots are distributed fairly randomly, but vertical lines are visible where they are drawn from different distributions.
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Sketchy Machines @verytiredrobot.bsky.social · 16/03/2025
Thanks to Noah Doersing for this clever #ptpx postcard showing the OSM street map data thoughtfully placed nearby, but not exactly on, my house.  Extra thanks for sharing your code (ghpages.noahdoersing.com/osm2svg4art/) - I definitely do plan to try it out! #plotterart #penplotter
A plotter art postcard showing a network of streets and paths in red, blue and green ink.
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Sketchy Machines @verytiredrobot.bsky.social · 15/02/2025
Latest #ptpx arrival, Lattice Boltzmann Method @ Re = 400. If you like CFD - and if you are reading this you very well might be the kind of person who does 🤓 - checkout the blog post. nathan.fun/posts/2024-1... #plotterart #ptpx
A plotter art postcard showing flow around a cylinder, from left to right.  The flow becomes slightly turbulent after passing the cylinder and the lines cross.  The postal service contributed some smudges.
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Reposted by Sketchy Machines
Padcrafting @padcrafting.com · 14/02/2025
On a pretty depressing day, I got a little cheer with a #ptpx postcard from @bylr.info - including information on how it was programmed, and links to GitHub.
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Reposted by Sketchy Machines
Padcrafting @padcrafting.com · 14/02/2025
Another #ptpx postcard arrived, this one from @pcasadebaig.bsky.social all the way from France. Beautifully intricate work. Is there a standard postcard size for the world? I've been operating on the idea that a postcard is 100x150mm, which granted based on US postal standards. #plotterart
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Sketchy Machines @verytiredrobot.bsky.social · 13/02/2025
Another #ptpx postcard! In a lovely red fine linework, this untitled piece is by Simon M. @smn_txyz. I really dig those illusory folds. Unfortunately I can't figure out what social media platform that handle is actually on, so if you know this person, please tag them with my thanks. #plotterart

A plotter art postcard comprising fine red grids.  Different regions are angled in different ways and where the regions abut, an illusion of folding is created.
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Reposted by Sketchy Machines
openprocessing.bsky.social @openprocessing.bsky.social · 11/02/2025
This one was a special #genuary, a little month of generative heaven in dark times! Congrats to all who did their best to join, and @piterpasma.nl and et al for making this happen. To celebrate, here is a #Genuary Reel to explore users who filled up their calendars on OP: bit.ly/genuary-reel
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Sketchy Machines @verytiredrobot.bsky.social · 10/02/2025
Over on Insta, there is a #plotterart plot party hosted by PenPlotArt. Been a while since I could join in, but I had time yesterday to try rendering from an old engraved illustration of the heart, and I'm pretty happy with it. Bic ballpoint / office paper on Roland DXY-885. (orig img in alt text)
A plotter art image in red ink of an engraved anatomical drawing of a human heart.  This variation allows some areas to be fully white, and the background is empty. (Source image https://thegraphicsfairy.com/royalty-free-images-anatomical-heart-vintage/)A plotter art image in red ink of an engraved anatomical drawing of a human heart.  This variation has a lightly diagonally hatched background as well as diagonal hatching in light areas. (Source image https://thegraphicsfairy.com/royalty-free-images-anatomical-heart-vintage/)
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Sketchy Machines @verytiredrobot.bsky.social · 02/02/2025
We had a postal strike in Canada, and while in principle they were back on the job by Christmas, the mail has been very, very slow to arrive. But I'm happy to say some #PTPX have been trickling in!  And hey, I haven't sent mine yet, so who am I to complain.  Without further ado, presenting 🧵
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