PlotBot: Difference between revisions
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<gallery> | <gallery> | ||
File:555688595 1215584740611888 2776984424721907890 n.jpg|3D-printed parts for original build | |||
File:Turtle-endstop.jpg|Different endstop microswitch | File:Turtle-endstop.jpg|Different endstop microswitch | ||
File:Turtle-switch-ball.jpg|Different size roller and endstop | File:Turtle-switch-ball.jpg|Different size roller and endstop | ||
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=== Endstops === | === Endstops === | ||
The microswitches come in different shapes and forms. We added extra prongs to the bumper ring to engage with wider range of microswitches. | The microswitches come in different shapes and forms. We added extra prongs to the bumper ring to engage with wider range of microswitches. | ||
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=== Power banks === | === Power banks === | ||
Ones we had didn't fit. We adjusted the layers 1 and made different versions of the upper ring to hold them in place. | Ones we had didn't fit. We adjusted the layers 1 and made different versions of the upper ring to hold them in place. | ||
== Control Board == | == Control Board == | ||
[[File:Turtle-bot-v3-pcb-back-etch.png|thumb|Traces can be drawn on copper laminate (cuprexit) with toner transfer technique and chemically etched. Negative printout for PCB etching: [https://github.com/lkundrak/turtle-robot/raw/refs/heads/main/artifacts/turtle-bot-v3-pcb-back-etch.pdf turtle-bot-v3-pcb-back-etch.pdf]]] | [[File:Turtle-bot-v3-pcb-back-etch.png|thumb|Traces can be drawn on copper laminate (cuprexit) with toner transfer technique and chemically etched. Negative printout for PCB etching: [https://github.com/lkundrak/turtle-robot/raw/refs/heads/main/artifacts/turtle-bot-v3-pcb-back-etch.pdf turtle-bot-v3-pcb-back-etch.pdf]]] | ||
We've drawn a PCB that can be sent to a manufacturing house, but is also optimized for chemical or CNC etching! | |||
Schematic: [https://github.com/lkundrak/turtle-robot/raw/refs/heads/main/artifacts/turtle-bot-v3-schematic.pdf turtle-bot-v3-schematic.pdf] | Schematic: [https://github.com/lkundrak/turtle-robot/raw/refs/heads/main/artifacts/turtle-bot-v3-schematic.pdf turtle-bot-v3-schematic.pdf] | ||
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Negative printout for PCB etching: [https://github.com/lkundrak/turtle-robot/raw/refs/heads/main/artifacts/turtle-bot-v3-pcb-back-etch.pdf turtle-bot-v3-pcb-back-etch.pdf] | Negative printout for PCB etching: [https://github.com/lkundrak/turtle-robot/raw/refs/heads/main/artifacts/turtle-bot-v3-pcb-back-etch.pdf turtle-bot-v3-pcb-back-etch.pdf] | ||
<gallery> | <gallery> | ||
File:630198759 1327012059469155 4819732943989781073 n.jpg|Cutting copper boards | File:630198759 1327012059469155 4819732943989781073 n.jpg|Cutting copper boards | ||
File:631316442 1327012126135815 8139523202493073450 n.jpg|Chilling in a pool after toner transfer | File:631316442 1327012126135815 8139523202493073450 n.jpg|Chilling in a pool after toner transfer | ||
File:640173458 1339273461576348 8523389435759424901 n.jpg|Toner transferred | File:640173458 1339273461576348 8523389435759424901 n.jpg|Toner transferred | ||
File:633395964 1327012302802464 3349586654434092500 n.jpg|Copper etching | |||
File:640446084 1339273764909651 2435820910506464661 n.jpg|Board fully etched | File:640446084 1339273764909651 2435820910506464661 n.jpg|Board fully etched | ||
File:640928983 1339273704909657 7028863716144500154 n.jpg|Posing for a picture | File:640928983 1339273704909657 7028863716144500154 n.jpg|Posing for a picture | ||
</gallery> | |||
== Software == | |||
Arduino code: https://github.com/vranicka/PlotBot | |||
=== More pictures === | |||
<gallery> | |||
File:20260119 145224.jpg|Robot coming alive | |||
File:555534763 1215584797278549 3519708831245411009 n.jpg|Robot skeleton | |||
File:PlotBot.jpg|In action | File:PlotBot.jpg|In action | ||
</gallery> | </gallery> | ||
Revision as of 17:49, 25 March 2026
What is this
A whiteboard drawing bot project. We didn't design the thing, but we built a couple of robots. Along the way, we made modifications and learned a lot.
Among things we learned is that it's a perfect project to get start with robotics.
Here's where it comes from:
https://hackaday.com/2025/09/02/this-plotter-knows-no-boundaries/
https://www.niklasroy.com/robotfactory/
The above link actually contains everything needed to get the bot going. Below are adjustments for parts we had.
Our modifications
Our FreeCAD model is here:
https://codeberg.org/lubko/turtle-robot/src/branch/main/tiny_turtle_plotter_CAD.FCStd
Modified parts typically have "new" in their name.
-
3D-printed parts for original build -
Different endstop microswitch -
Different size roller and endstop -
Roller ball -
Roller ball -
Wheels and tyres -
Wheels -
Wheel carriage -
Stepper motors
Endstops
The microswitches come in different shapes and forms. We added extra prongs to the bumper ring to engage with wider range of microswitches.
Roller ball
We used a larger furniture ball, which in turn means we had to make room in the parts in two lowest layer and make the wheels larger.
Wheels
The wheels were too small, possibly because our roller ball was bigger. They were also rubbing against layers 1 and 2, and appeared to be made for 5mm shaft in the stepper (our had 6mm). This has, of course, thrown off the geometry. a little.
We also had different size tyres.
Power banks
Ones we had didn't fit. We adjusted the layers 1 and made different versions of the upper ring to hold them in place.
Control Board
We've drawn a PCB that can be sent to a manufacturing house, but is also optimized for chemical or CNC etching!
Schematic: turtle-bot-v3-schematic.pdf
Fabrication notes: turtle-bot-v3-pcb-fab-notes.pdf
Negative printout for PCB etching: turtle-bot-v3-pcb-back-etch.pdf
-
Cutting copper boards -
Chilling in a pool after toner transfer -
Toner transferred -
Copper etching -
Board fully etched -
Posing for a picture
Software
Arduino code: https://github.com/vranicka/PlotBot
More pictures
-
Robot coming alive -
Robot skeleton -
In action
